All of the parts of a series circuit are wired together end to end to create a single path for current flow. In a parallel circuit, one component is linked across the other by the same voltage at exactly two electrically common nodes.
A series circuit has two resistors A and B. The total resistance is 27 ohms. A has a resistance of 15 ohms. Calculate the resistance of B.
"12Ω"
In a series circuit the current is constant throughout the circuit and the resistance is the sum of all the resistances in it.
R_eq = ∑ Ri
in this case we have
R_eq = R₁1 + 3 R₂
where R₁ is the resistance of A and R₂ the resistance of B.
let's calculate
27 = 15 + R2
R2 = 12Ω
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You are driving through town at 12.0 m/s when suddenly a ball rolls out in front of you. You apply the brakes and begin decelerating at 3.5 m/s^2
(a) How far do you travel before stopping?
(b) When you have traveled only half the distance in part (a), is your speed 6.0 m/s, greater than 6.0 m/s, or less than 6.0 m/s?
(c) Find the speed of your car when you have traveled half the distance in part (a).
(a) The distance traveled by the driver before stopping is 20.57 m.
(b) When you have traveled only half the distance in part (a), your speed is greater than 6.0 m/s.
(c) The speed of your car when you have traveled half the distance in part (a) is 8.49 m/s.
Distance traveled by the driver before stoppingThe distance traveled by the driver before stopping is calculated as follows;
v² = u² + 2as
when the car stops, the final velocity, v = 0
0 = u² + 2as
0 = 12² + 2(-3.5)s
0 = 144 - 7s
7s = 144
s = 144/7
s = 20.57 m
when you travel half of 20.57 mv² = (12²) - 2(3.5)(0.5 x 20.57)
v² = 72.005
v = √72.005
v = 8.49 m/s
Thus, when you have traveled only half the distance in part (a), your speed is greater than 6.0 m/s.
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Which of the following statements is true
based upon your observations of the Earth
revolving around the Sun?
The hemisphere tilted away from the Sun
experiences winter; during this time the
pole in this hemisphere experiences 24
hours of sunshine.
The hemisphere tilted away from the Sun
experiences summer and the hemisphere
tilted towards the Sun experiences winter.
The hemisphere tilted towards the Sun
experiences summer; at this time the pole
in this hemisphere experiences 24 hours
of darkness.
The hemisphere tilted towards the Sun
experiences summer and the hemisphere
tilted away from the Sun experiences
winter.
The statement ' The hemisphere tilted towards the Sun experiences summer and the hemisphere tilted away from the Sun experiences winter.' is true.
The variation in seasons is due to the slight tilt of the earth on its axis towards the sun. This tilt is approximately equal to 29 and 1/2 degrees.
Due to this tilt of the earth, the north pole or the south pole of the northern or the southern hemisphere respectively never directly faces the sun.
But when the respective hemisphere is tilted towards the sun, it is as close to the sun as it is physically possible, and therefore that hemisphere experiences the summer season.
Whereas the other hemisphere which is tilted away from the sun is as far from it as possible and receives very little sunlight and hence experiences the winter season.
In the context of the above discussion, the statement ' The hemisphere tilted towards the Sun experiences summer and the hemisphere tilted away from the Sun experiences winter.' is true.
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A rock is thrown off a cliff with a speed of 5 m/s downward. How far will it fall after 7 seconds have elapsed?
Answer: 30 meters
Explanation: 5 meters times 7 seconds
2. What are the benefits of repeated trials?
Science is the study of how the world functions through the systematic process of data collection known as the scientific method.
What are repeated trials?Repeated trials are when a measurement is performed more than once at least three times, most often five but the more the better.
The likelihood that a measurement made once will yield an accurate result is substantially smaller. However, if you measure it multiple times, you may average the results to produce a value that is considerably more accurate.
In repeated trials, the same thing is measured repeatedly to increase the accuracy of your results. This is essential since data in the actual world frequently varies and nothing is flawless. Your average will get more closely to the genuine value as you perform more trials.
Therefore, Science is the study of how the world functions through the systematic process of data collection known as the scientific method.
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Sanjay is a veterinary scientist who works for a pharmaceutical company that manufactures cures for many diseases that affect animals. Recently, his company came across a substance that they believe could be used to fight one of the biggest threats to the American food system. The problem is that this particular disease can only be studied on Plum Island, in New York. Sanjay is on a helicopter meant to take him to Plum Island to begin his research with live samples of the disease. Which disease is Sanjay’s drug MOST likely attempting to heal?
A. mad cow disease
B. toxoplasmosis
C. foot and mouth disease
D. swine flu
Sanjay is going to Plum island to begin his research with live samples of the disease. So, Sanjay's drug is most likely an attempt to heal foot and mouth disease. Hence, option C is correct.
What is Foot and Mouth disease?All animals with cloven hooves, including cattle, sheep, goats, came lids, deer, and pigs, are susceptible to the deadly and contagious foot-and-mouth disease (FMD). Animals with divided hooves are known as cloven-hoofed animals. Zebras and horses are unaffected.
Humans, not animals, are affected by the hand, foot, and mouth disease (HFMD), which is common in young children. FMD is a different illness. People cannot contract FMD by eating infected beef.
The FMD virus is present in all live animals, meat, dairy products, soil, bones, untreated skins, automobiles, and equipment used with these animals. It can also persist in foods that have been chilled, frozen, or freeze-dried, as well as on people's clothing and shoes.
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What do we mean by internal and external structure of a substance in solid state?
The external structure of a solid refers to the overall structure of the solid due to the arrangement of its particles..
The internal structure of a solid is the the arrangement of unit particles in the internal space of the solid.
What is a solid?A solid is a substance which has a definite shape and volume.
Solids are one of the three states of matter.
The particles in a solid are arrange in regular repeating patterns due to the strong intermolecular forces of attraction between the particles in the solid.
The external structure of a solid refers to the overall structure of the solid due to the arrangement of its particles.
The external structure of a solid may be a crystal or amorphous in shape.
The internal structure of a solid is the the arrangement of unit particles in the internal space of the solid.
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velocity equations solve:
15, km over second
find the m/s
and find the km/h
The 15 km/s velocity is equivalent to 15000 m/s and 54000 km/h.
Velocity is a vector quantity. It consist both a direction and a magnitude. The magnitude of velocity is called speed. Its S.I. unit is a meter/second. It also has other units like Km/h and Km/s. Its dimensional formula is [[tex]LT^{-1}[/tex]].
Given in the question
Velocity is 15 Km over a second
We can infer from the given value that the body moves 15 km per second.
1 Km = 1000 m
1 Km × 15 = 15 × 1000 m
So 15 Km = 15000 m
Hence we can say that the body travels 15000 meters in a second.
As a result, its velocity in m/s is 15000 m/s.
Now
15 kilometers can be covered in 1 second.
Distance traveled in 3600 seconds = 3600 × 15 Km
So the total distance traveled in 3600 seconds is 54000 kilometers.
Also 3600 seconds = 1 hour
In other words, The body travels 54000km in 1 hour, hence its velocity is 54000 km/h.
Therefore, the 15 km/h velocity is equal to 15000 m/s and 54000 km/h.
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need help
what is a difference between a compound and a element
Answer is
Elements are pure substances which are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions.
Explanation:
I think that's the correct answer sorry if im wrong
A car is traveling at a steady 86 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.1 m/s2 .
How far is the motorcycle from the car when it reaches this speed?
A scalar quantity, speed is defined as the size of the change in an object's location over time or the size of the change in an object's position per unit of time.
How far is the motorcycle from the car when it reaches this speed?
When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time.
Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration.
Given,
Speed = 86 km/h
= 86000m/3600 s = 23.89m/s
v = a t
so,
23.89 = 7.1 * t
Therefore, t = 3.36 seconds
Distance car went = 23.89*3.36 = 80.38m
Distance motorcycle went = (23.89/2)* 3.36 = 40.14m
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What was Bernard Kimani's speed in the Crim in FlintMI when he ran 13.1 mile in 1.00 hours?
The speed of Bernard Kimani in the Crim in FlintMI who ran 13.1 miles in 1 hour is 13.1 miles/hr.
What is Speed? Is it scalar or vector?Speed is defined as the rate of change of distance travelled with respect to time. Mathematically -
s = Δd/Δt
It is a scalar quantity.
Given in the question is Bernard Kimani's from FlintMI who ran 13.1 miles in 1 hour. From this we can write-
Distance [d] = 13.1 miles
Time [t] = 1 hour
Bernard Kimani started running from d = 0 miles at time t = 0 hr.
The speed of Bernard Kimani will be -
s = Δd/Δt
s = (13.1 - 0)/(1 - 0)
s = 13.1 miles/hr
Therefore, the speed of Bernard Kimani in the Crim in FlintMI who ran 13.1 miles in 1 hour is 13.1 miles/hr.
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[tex]{\huge\color{green}{\boxed{\fcolorbox{red}{blue}{꧁QUESTION꧂}}}}[/tex]
What is Mutual Induction ?
When a change in current in one coil induces EMF in the other coil, this phenomenon is called mutual induction.
The strength of the induced EMF depends on the mutual inductance of the coil pair. Mutual inductance has the SI unit of Henry, the same as self-inductance. Digital signal processing is another example where counter-rotating coils reduce mutual inductance. Fast on, off electromotive forces representing 1s and 0s in digital circuits create complex time-varying magnetic fields. EMF can occur on adjacent conductors.
Mutual inductance is the fundamental working principle of transformers, motors, generators, and other electrical components that interact with another magnetic field. Mutual induction can then be defined as the current flowing in one coil inducing a voltage in the adjacent coil. Mutual induction is the ability of an inductor in one circuit to induce a voltage in another circuit.
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What major difference was there in the US leadership during the Potsdam Conference?
A. Roosevelt was tougher on the Soviet Union and Germany
B. Truman was tougher on communism and less appeasing
C. Truman was more willing to compromise to make progress
D. Roosevelt began using atomic weapons as a bargaining threat
26. How are a hypothesis and a theory similar?
They are both attempts to explain natural phenomena
They are about equally true
A hypothesis and a theory cannot be revised.
Theories and hypotheses are produced by experts
Answer: The are both attempts to explain natural phenomena is what ima say.
Explanation: I hope this is right an di hope this helps.
What is the distance travelled by the motorbike while it is moving at
constant speed?
(a) 150m
(b) 50m
(c) 300m
(d) 750m
Any Expert Please Help me out
The distance travelled by the motorbike while it is moving at a constant speed is 150m
From the graph, we form the relationship between the speed s and the change in the time t for the journey, i.e. from t = 20sec to t = 30sec speed s is constant = 15m/s
As the formulae states that
Speed = Distance / Time
Distance = Speed × change in time
⇒15 × ( 30 - 20 )
⇒15 × 10
⇒150m
Hence the Distance travelled by bike was 150m
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Use the energy equation, your answer from #5, and Planck’s constant (6.63E-34) to find the approximate energy of this photon:
4.8E-19 Joules
3.0E-19 Joules
3.0E-17 Joules
1.21 Gigawatts
The energy for the Photon with frequency 4.6 x 10 raise to power 14 Hertz is equal to 3 × 10 raised to power minus 19.
What is a Photon?A photon is an elementary particle that is a quantum of the electromagnetic field and the force carrier for the electromagnetic force. Photons are massless, so they always move at the speed of light in vacuum, 299792458 m/s.
What is energy equation for radiation?Energy equation is a derivative of the energy mass equation and is used to give energy of an electromagnetic or particle have frequency.
Given:
Frequency of the photon = 4.6×10¹⁴
Value of plank constant = 6.626×10⁻³⁴
Now from energy equation we have-
Energy of photon = plank constant × frequency of the photon
E = h × v
Where,
E is Energy of photon
h is plank constant
v is frequency of the photon
On substituting values in the energy equation we get,
E = 6.626 × 4.6×10⁻²⁰
E = 3 × 10⁻¹⁹
The energy for the Photon with frequency 4.6 x 10 raise to power 14 Hertz is equal to 3 × 10 raised to power minus 19.
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what happens to the sh
ape of water when we pour the same volume of water in different containers of different shape
Answer:
It shapes into the form of the container because water is a liquid.
Explanation:
A tank has two rooms separated by a membrane。 Room A has 1 kg of air and a volume of 0.6m³、room B has 0.8 m 'of air with density 0.9 kg /m³。 The membrane is broken、and the air comes to a uniform state。 Find the final density of the air?
The final density of air coming to a uniform state after the membrane is broken is 1.23 kg / m³
ρ = m / V
ρ = Density
m = Mass
V = Volume
[tex]m_{A}[/tex] = 1 kg
[tex]V_{A}[/tex] = 0.6 m³
[tex]V_{B}[/tex] = 0.8 m³
ρ[tex]_{B}[/tex] = 0.9 kg / m³
Total mass, m = [tex]m_{A}[/tex] + [tex]m_{B}[/tex]
m = [tex]m_{A}[/tex] + ρ[tex]_{B}[/tex] [tex]V_{B}[/tex]
m = 1 + ( 0.8 * 0.9 )
m = 1.72 kg
Total volume, V = [tex]V_{A}[/tex] + [tex]V_{B}[/tex]
V = 0.6 + 0.8
V = 1.4 m³
Final density, ρ = m / V
ρ = 1.72 / 1.4
ρ = 1.23 kg / m³
Therefore, the final density of air coming to a uniform state after the membrane is broken is 1.23 kg / m³
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A car is driving on a gravel road at a speed of 12 m/s. The car maintains this speed for 10 seconds. Going around a bend the car reduces speed to 5 m/s during the next 5 seconds. Over the last 15 seconds the car increases its speed with 2 m/s every second. Determine the maximum and minimum values for both axes.
The maximum distance covered by the car from point A to B will be 120 meters, and the minimum distance covered by the car will be 25 meters.
What is Speed?Measuring is the most important scientific concept. Many different types of quantifiable quantities can be measured using base or physical fundamental units. One such quantifiable quantity is speed, which computes the proportion of a moving object's distance travelled to its travel time.
According to the question,
Point A and B are taken on X-axis and point B,C and D are taken on y-axis.
On going from point A to B,
Time taken= 10 seconds
Speed= 12 m/s
Distance covered will be : Speed × time
=12 × 10 sec
Distance= 120 meters
On going from Point B to C,
Time taken= 5 Seconds
Speed= 5 m/s
Distance covered by car will be : Speed × Time
=5 × 5 sec
Distance= 25 meters.
Now, On going from point C to D,
Time taken= 15 seconds
Speed= 2 m/s
Distance covered = speed × time
= 2 × 15 sec
Distance= 30 meters
Hence, the maximum distance covered by car is 120 meters when it goes from point A to B and the minimum distance covered by car is 25 meters when it goes from Point B to C.
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A projectile is launched at 68.0° above the horizontal and at a speed of 55 m/s. How long will it take the projectile to reach maximum height?
Answer:
5.2s
Explanation:
We care about the vertical component of the velocity, which, in our case, is [tex]v_y=55 sin 68\° m/s \approx 51 m/s[/tex]. The projectile is affected by gravity, which means its velocity will decrease by [tex]g= 9.81 m/s[/tex] each second. Remembering that at maximum height velocity is zero, we can write [tex]0=51-9.81 t \rightarrow t= \frac{51}{9.81}\approx 5.2s[/tex]
1. Which of the determinants of health and wellness do you have least
control over?
O A.Environment
B. Health Care
OC. Social and Individual
D. Personal
A ball is thrown horizontally from a cliff. Identify which of the following statements about the ball is/are correct.
I The vertical velocity of the ball increases as it falls.
II The vertical acceleration of the ball increases as it falls.
III The vertical force on the ball increases as it falls.
(1 point)
I. The statement that describes the motion of the ball is "The vertical velocity of the ball increases as it falls.
What is velocity of a projectile?The velocity of a projectile is the rate of change of displacement of the projectile.
The velocity of a projectile can be vertical or horizontal.
Vertical velocity of a projectileThe vertical velocity of a projectile is affected by force of gravity. When an object is thrown upwards, the speed of the object decreases because the force of gravity acts in opposite direction to the motion of the object.
The speed of the object decreases and eventually becomes zero when the object reaches maximum height.
As the object begins to descend, its velocity increases because the object is moving in the same direction as the force of gravity, and the velocity of the object eventually becomes maximum before the object hits the ground.
Thus, the statement that describes the motion of the ball is "The vertical velocity of the ball increases as it falls.
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The first one is obvious.
But if you get super picky technical, II and III are also true, because the ball gets closer to the center of the Earth as it falls.
An object traveling at a constant speed exhibits which of the following:
Net force of 0N.
Acceleration is 0m/s/s
Speed of 0m/s.
None of the above
When an object is traveling at a constant speed, the acceleration is 0 m/s².
What is constant speed?If an object covers an equal amount of distance in equal interval of time, then the body is said to be moving at a constant speed.
F - ff = ma
where;
F is the applied forcem is mass of the objecta is acceleration of the objectDuring constant speed, acceleration = 0
Thus, when an object is traveling at a constant speed, the acceleration is 0 m/s².
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a glass block in air has a critical angle of 49degrees. what will happens to a ray of light coming through the the glass when it is incident at the angle at a angle of 50degrees
If a glass block in the air has a critical angle of 49° and an incident angle of 50°, any light rays entering to the glass will be bent away from the normal and refraction would be happen.
The critical angle is the angle of incidence in a denser medium for which the angle of refraction in a rarer medium is 90°. which would be represented by (c). The bending of light ray through one medium to the another medium would be defined as refraction. There are two refraction laws, which are written as,The normal, refracted, and incident rays all lie on the same plane For any two media, the ratio of incident to refracting angle is a constant. This is also known as Snell's law .[tex]\frac{sin_{i} }{sin_{r} } =n[/tex]
In above equation , n is constant, sin i and sin r are the angles of incident and refracted ray for two medium.
Therefore, from the above discussion ,as the incident angle is laser than the critical angle so that the ray of light would be refract away from the normal.
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Daniel's physician has told him that he needs to spend less time in his office chair because sitting for so long is causing him to have back pain. What ergonomic solution could help him?
(A short explanation is ok if you can)
A) wearing a wrist brace
B) a standing desk
C) moving his monitor closer to his eyes
D) using a speakerphone more often
(please help ill give brainliest as soon as i can =) )
The possible ergonomic solution that could help Daniel reduce hos back pain caused by sitting long on his chair is a standing desk.
What is ergonomic solution?
Ergonomics is defined as the science of creating a working environment that suits the capabilities and limitations of the worker while providing the best working experience.
If Daniel's physician has told him that he needs to spend less time in his office chair because sitting for so long is causing him to have back pain. The possible ergonomic solution that could help him include the following.
Daniel can use a revolving seatDaniel can also use a standing desk; this will enable him stand and reduce his back pain which happens when he sits for long.Thus, the possible ergonomic solution that could help Daniel reduce hos back pain caused by sitting long on his chair is a standing desk.
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Answer: B. A standing desk
Explanation: I remember getting it right on my test.
The earth has a radius of 6.38×10^6 meters. Assume a perfectly smooth spherical earth. Calculate the minimum horizontal velocity required for an object to orbit the earth just above the surface
The minimum horizontal velocity required for an object to orbit the earth just above the surface is 5.04 x 10¹⁰ m/s.
What is orbital speed of earth?
The orbital speed of Earth or a natural satellite is the speed at which it orbits around the center of the system.
The minimum orbital speed of the Earth is calculated as follows;
V(min) = √GMR
where;
G is universal gravitation constant = 6.67 x 10⁻¹¹Nm²/kg²M is mass of earth = 5.97 x 10²⁴ kgR is the radius of the earth = 6.38 x 10⁶ mSubstitute the given parameters and solve for the minimum orbital speed of the earth.
V(min) = √(6.67 x 10⁻¹¹ x 5.97 x 10²⁴ x 6.38 x 10⁶)
V(min) = 5.04 x 10¹⁰ m/s
Thus, the minimum horizontal velocity required for an object to orbit the earth just above the surface is 5.04 x 10¹⁰ m/s.
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A 12kg object is moving up at a rate of 5m/s when it is 3m above the ground. How high in the air will it be when it stops moving
The air will be when it stops moving 180J.
The generally accepted boundary where space begins, which is also the point where the atmospheric pressure is assumed to be zero, is called the Kalman line. Simply put, gases move from areas of high pressure to areas of low pressure. And the greater the pressure difference, the faster air moves from high pressure to low pressure. This draft is the wind we experience.
As the air rises the surface pressure decreases. As the air rises, it expands and cools adiabatic cooling that is, it cools by changing volume rather than by increasing or decreasing heat. As a result, condensation/sedimentation occurs. Cold air sinks. The boundary between Earth and space is called the Kalman Line, an imaginary line 100 kilometers above Earth. This line is considered the boundary between space and the Earth's atmosphere.
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A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 60.0° with the vertical. Find the velocity of the rain with respect to the following reference frames. (Enter the magnitude of the velocity.)
(a) the car
m/s
(b) the Earth
m/s
The velocity of the rain with respect to car is 43.3 km/h and the velocity of the rain with respect to earth is 50 km/h.
What is relative velocity?Relative velocity is the velocity of one object with respect to another using a frame of reference.
Velocity of the rain with respect to the car
V(rc) = 50 km/h x sin(60)
V(rc) = 43.3 km/h
Velocity of the rain with respect to the earth
V(re) = speed of the car = 50 km/h
Thus, the velocity of the rain with respect to car as frame of reference is 43.3 km/h and the velocity of the rain with respect to earth as the frame of reference is 50 km/h.
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vector A points in the negative x direction and has a magnitude of 25 units. The vector B points in the positive y direction. Find the magnitude of B if A+B has a magnitude of 35 units
The magnitude of vector B is determined as 24.5 units.
What is resultant vector?
A resultant vector is defined as a single vector that produces the same effect as is produced by a number of vectors collectively.
The given parameters;
magnitude of vector A = 25 unitsresultant of vector A and B = 35 unitsmagnitude of vector B = ?The magnitude of vector B is calculated as follows;
B² = R² - A²
where;
R is the resultant vector or sum of vector A and vector BB = √(35² - 25²)
B = 24.5 units
Thus, the magnitude of vector B is determined as 24.5 units.
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Football player Joe is running toward the opponent's goal line with the football, and slows down as he encounters the other team. If the opponent's goal line is the reference point, which of the following best describes his motion?
Question 4 options:
Negative Velocity, Negative Acceleration
Negative Velocity, Positive Acceleration
Positive Velocity, Negative Acceleration
Positive Velocity, Positive Acceleration
Since Joe is running towards the goal line and slowing down, the option that describes this motion is negative velocity, negative acceleration.
What is negative velocity?A negative velocity occurs when an object moves in the negative direction.
Example of negative velocity;
If a car is moving away from you (reference point) then the velocity is positive.
If a car is coming towards you (reference point) then the same vector reverses direction and hence the velocity is negative.
What is negative acceleration?If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion. Thus, the acceleration of the object will be negative.
Thus, since Joe is running towards the goal line and slowing down, the option that describes this motion is negative velocity, negative acceleration.
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On the way to class, you walk east and then south such that your resultant displacement is 360 m in a direction 53 ° south of east. Your average velocity is 2.0 m/s in the same direction as the displacement. Calculate
(a) your walking time and (b) your average speed
(A) Your walking time during the journey is 180 seconds.
(B) Your average speed during the journey is 2.8 m/s.
What is the time of motion?The time of motion is the time taken for an object to travel a given distance.
V(average) = displacement / time of motion
time of motion = displacement / average velocity
time of motion = (360 m) / (2 m/s)
time of motion = 180 seconds
Distance traveled in east directionDx = 360 m x cos(53)
Dx = 216.65 m
Distance traveled in south directionDy = 360 m x sin(53)
Dy = 287.5 m
Total distance travelled = 216.65 m + 287.5 m = 504.15 m
What is average speed?The average speed of an object is the ratio of total distance to total time of motion.
average speed = (504.15 m) / 180 s
average speed = 2.8 m/s
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