Answer:
It is unbalanced
Explanation:
There are 5 more newtons of force being exerted toward the right.
what's the momentum of a 99 kg Boulder going 30 m/s?
Answer:
2970kgm/s
Explanation:
p=m.v
=99kg.30m/s
=2970kgm/s
If your bathroom scale reads 150 lbs, what is your mass in kg? What is your weight in newtons?
A ball is dropped from the top of a 55.0 m-high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 26.0 m/s. The stone and ball collide part way up.
Distance from base of the cliff is 33.2 m
Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.
It is given that
height of cliff = 55.0 m
speed of stone = 26.0 m/s
y1 = 55.0 - 4.9 t^2
y2 = 26 t - 4.9 t^2
y2 - y1 = 26 t - 55
t = 55/26 = 2.11 s
y1 = 33.2 m
Hence, distance from base of the cliff is 33.2 m
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Complete Question
A ball is dropped from the top of a 55.0m high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 26.0m/s The stone and ball collide part way up.
How far above the base of the cliff does this happen in meters?
Velocity/Acceleration
a car driving down the highway goes from the 12 mile marker and sometimes later passes the 158 mile mark. how many miles has the car driven
The distance travelled by the car is 146 miles.
What is distance?Distance is a measure the space between two points.
Distance is measured in units of length such as kilometer, meters, miles, feet, etc.
In order to measure the distance between two points, a measuring instrument such as a ruler is used.
Considering the car that was travelling along the road, the distance traveled by the car is calculated as follows;
The car starts moving from an initial highway marker of 12 miles.
The car then travels from the initial highway marker of 12 miles to a second highway marker of 158 miles.
The distance travelled by the car is obtained by finding the differences between the highway markers.
Difference between the highway markers = 158 miles - 12 miles
Difference between the highway markers = 146 miles.
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Block 1, of mass m1, is connected over an ideal (massless and frictionless) pulley to block 2, of mass m2, as shown. Assume that the blocks accelerate as shown with an acceleration of magnitude a and that the coefficient of kinetic friction between block 2 and the plane is μ.
Find the ratio of the masses m1/m2 .
Express your answer in terms of some or all of the variables a , μ , and θ , as well as the magnitude of the free-fall acceleration g .
The ratio of the masses will be: (a + gsin(θ) + μgcos(θ)) / (g – a)
What is friction?Friction can be defined as the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other
To solve the above problem, we must find the tension with respect to both masses, and then equate since the tension is the same throughout the entire rope:
For mass 1:
(m1)g – T = (m1)a
substituting where
T = (m1)g – (m1)a
T = (m1)(g – a)
For mass 2:
T – (m2)gsin(θ) – (m2)μgcos(θ) = (m2)a
T = (m2)a + (m2)gsin(θ) + (m2)μgcos(θ)
T = (m2)(a + gsin(θ) + μgcos(θ) )
we will then equate both equations having m1 and m2 were factored in the above equations. we do this in order to isolate m1/m2
(m1)(g – a) = (m2)(a + gsin(θ) + μgcos(θ))
m1/m2 = (a + gsin(θ) + μgcos(θ)) / (g – a)
The ratio of the masses is:
(a + gsin(θ) + μgcos(θ)) / (g – a)
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Identify two kinds of data the student will likely collect during his experiment. Identify the type of data collected and how the student might present his data.
The two kinds of data that can be collected during an experiment are qualitative and quantitative data.
What are qualitative and quantitative data?
Numbers are used to convey quantitative data, which are measurements of values or counts. Numerical variables are the subject of quantitative data.
Qualitative data are represented by a name, symbol, or number code and are measurements of "types." Data concerning categorical variables make up qualitative data.
To provide a complete picture of a population, quantitative and qualitative data are frequently combined since they produce distinct results. For instance, if yearly income statistics are acquired (quantitative), occupation data might also be gathered (qualitative) to learn additional specifics about the average annual income for each type of profession.
Depending on whether the variable of interest is numerical or categorical, it is possible to acquire both quantitative and qualitative data from the same data unit.
Therefore, the two kinds of data that can be collected during an experiment are qualitative and quantitative data.
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How long must a current of 0.1A flow so as
to transfer a charge of 30 C?
300 s is the time taken.
Electric charge is a physical property that creates a force on matter within an electromagnetic field. A charge can have a positive or negative nature. A substance is considered neutral or uncharged if it has no net charge.
Current is the speed at which electrons pass through a point in a complete circuit. The simplest is current = flow. Ampere or Ampere is the international unit used to measure electrical current.
So here Q=I x t
t=Q/I
=30/0.1
=300/1
=300s
so from the above equation, and the given data that 0.1A is the current and the charge is 30C. the time taken is 300s.
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How do microwaves differ from radio waves?
OA. Microwaves have a lower frequency.
OB. Radio waves have a shorter wavelength.
C. Microwaves have more energy.
OD. Microwaves are not used in communications.
Microwaves differ from radio waves as they have higher frequencies than radio waves.
A recurring event's frequency is measured by how many times it occurs in a unit of time. To emphasize differences between spatial and angular frequencies, it is also sometimes referred to as ordinary frequency or temporal frequency respectively.
Microwaves propagate in a single direction at a time because they are directional. Radio waves have multiple directions in which they can travel from their source. The acceleration of electrons produced in the radio antenna produces radio waves. Microwaves are a subclass of radiowaves.
A microwave is an electromagnetic wave with a low frequency and relatively long wavelength. Despite having greater frequencies than conventional radio waves, microwaves are frequently categorized as radio waves. They have more energy and higher frequencies.
The correct option is B.
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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.
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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What is the scientific name of the cup-shaped pouches of lung tissue that are one-cell thick, and they are the site of gas exchange?
A. Bronchioles
B. Trachea
C. Alveoli
D. Glottis
E. Pharynx
OF. Larynx
G. Nose
Answer:
your answer is C
Explanation:
Alveoli is your answer
0.030 km
2. The Olympic record for the marathon is 2hr, 1min, 39s. Determine the average velocity in m/s and
miles per hour of the record.
0.0041m/s and 0.00917 mile/hr. is the average velocity.
If an object moves with an average speed of v for time t, then the distance traveled by this object is s= v.t
Average speed and time are given in the task. So you can use this formula to calculate the marathon distance.
Velocity or speed is defined as: The rate of change of the object's position in any direction. Velocity is measured as the ratio of distance traveled and time traveled. Velocity is a scalar quantity because it has only direction and not magnitude.
time =2hr, 1min, 39s s= 0.030km
t= 7299s s=30m
v=s/t=30/7299
=0.0041m/s.
in mile per hour = 0.00917 mile/hr
So feom the above equations solved the answer is 0.0041m/s and 0.00917 mile/hr.
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Express the speed of 60 m per minute in km per hour.
Answer:
3.6 kilometres per hour
Explanation:
for an approximate result, divide the speed value by 16.667
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 67.1 N, Jill pulls with 89.7 N in the northeast direction, and Jane pulls to the southeast with 123 N. (Since the donkey is involved with such uncoordinated people, who can blame it for being stubborn?) Find the magnitude of the net force the people exert on the donkey.
The strength of the force increases when all the forces are pulling in the same direction. When forces are exerted on an item from different angles, the force's strength reduces.
What is force?The definition of force is: The pushing or pulling that alters the velocity of a mass item. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. There are several instances of forces in daily life, including: heft and force (i.e. the weight of something) the force a bat applies to a ball. the pressure that a hair brush applies to hair when brushing it. the pressure exerted by your foot.
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What is the force in this
Answer:
It something big enough for this
might be balance force, because the stacks of sticks remains stationary/ stable
definition of balance force = it is when resultant force acting on an obeject is zero and its said to be equilibrium. by newton's first law, the object remains stationary or continues moving at a constant velocity,
bye, hope u understand
. Biologically, humans are "preprogrammed" to have one major sleep cycle at night and another short one in mid-afternoon. In some cultures, a Siesta is the norm, while in other cultures, people are expected to remain awake all day. Other cultures may emphasize practices that lead to sleep deprivation, such as working long hours, socializing until late at night, and getting up early in the morning. What attitudes does your culture have toward sleep?
A new study shows that your body clock doesn't determine when you go to bed, but it does affect how you wake up in the morning.
Cultural pressures and daily responsibilities can override our body clocks and affect how long we sleep, according to a study in Science Advances.
But when people wake up, researchers say, it's not just about doing morning chores like going to work or school, it's also heavily dependent on your body clock.
The new findings are a reminder that sleep is more important than many realize, researchers said. Even if taken, the person still builds up a sleep debt.
Studies have found that middle-aged men sleep the least, often less than the recommended 7-8 hours.
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Question for everybody... Do you like billie eilish or do u hate her and give a explanation why you hate or like her?
Answer:
I like Billie Eilish
Explanation:
My friend introduced me to yer music and really liked stuff like the 30th and Happier than ever. Me and my friend bond over her music and my friend has her own records that we listen too. Billie sticks up for herself and hasnt had to many big controversal moments and she bring modernism to the music indrustry. We have seen many sides of her and she supports others and seems to be a good be a good human being.
Answer:
Yes I like Billie sm
Explanation:
I've heard her music in so many places for years, and she is on my playlist. She is very amazing! I love Happier than Ever, lovely, and Ocean Eyes, they are my fav!
What is the magnetic force on a 240 mm length of wire stretched between two towers carrying a 150 A current given that the earth’s magnetic field is
5X10^5T
and makes an angle of
60o
with the wire?
The magnitude of magnetic force is 1.55 mN
We know that,
F = I B L Sin θ
where,
F = Magnetic force
I = Current
B = Magnetic field
L = Length
θ = Angle
Given that,
L = 240 mm = 0.24 m
I = 150 A
B = 5 * [tex]10^{-5}[/tex] T
θ = 60°
F = 150 * 5 * [tex]10^{-5}[/tex] * 0.24 * sin 60°
F = 1.55 mN
Magnetic force is the attractive or repulsive force created when electrically charged particles are moved. So, it is the consequence of an electromagnetic force which is one of the four fundamental forces of nature.
Therefore, the magnitude of magnetic force is 1.55 mN
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What system includes the system that starts the vehicle?
Explanation:
The electrical system provides the voltage necessary to operate the many electrical components on the vehicle such as the vehicle's lighting system. The main source of power for the electrical system is the battery. The electrical system also includes the starting system and the charging system.
 which of the following questions may be difficult to test scientifically?
What is the average flight speed of an African swallow?
how was Hawaii formed?
why is cheating wrong?
is there evidence of water on other planets?
When conducting a scientific experiment, it will be difficult to test why cheating is wrong. Thus, (c) is the correct answer.
Scientific experiment is an experiment or study conducted by researchers to verify the authenticity of a test or hypothesis scientifically or assess the possibility or effectiveness of something that has not been attempted before. Scientific experiments show what happens when a certain component is modified, which sheds light on cause-and-effect relationships.
Controlled, field and natural experiments are three essential types of scientific experiments.
Keeping in mind that a successful scientific experiment typically evaluates one independent variable at a time, it is crucial to utilize a control group and to hold all other possible variables constant.
Therefore, it is difficult to test scientifically why cheating is wrong.
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Answer: why is cheating wrong?
Explanation: may be difficult to test scientifically is why is cheating wrong
The capacitance of two capacitors connected in series will is
analogous to
a. two resistors connected in series
b. two resistors connected in parallel
c. none of the above.
d. all of the above.
The capacitance of two capacitors connected in series will is
analogous to two resistors connected in parallel.
What is capacitor?In an electric field, a capacitor is a device that stores electrical energy. It has two terminals and is a passive electrical component. Capacitance refers to a capacitor's effect.
The International System of Units' (ISO) standard unit of capacitance is the farad (F) (SI). It denotes a substance's capacity to store an electric charge. Most electrical capacitors are measured in farads, microfarads (F), or nano-farads to express their value (nF).
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A certain brand of light bulb converts 45% of the available electrical current into light. What is the efficiency of the bulb?
The efficiency of the bulb is the 45%, because it is the useful energy or output energy of the light bulb.
What is efficiency?The efficiency of a device is the amount of the energy input to the device that is converted to a useful energy.
So we say that efficiency of a device is how good a device is at converting energy input to useful energy output.
The efficiency of a device or machine is calculated using the following formula;
efficiency = 0utput energy/input energy x 100%
efficiency = useful energy / total energy x 100%
Thus, if a certain brand of light bulb converts 45% of the available electrical current into light. The efficiency of the bulb is the 45%, because it is the useful energy or output energy of the light bulb.
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A cellphone emits a radio signal with a frequency of 1910 MHz. Determine its wavelength
The wavelength of the radio signal, λ = 1.57 m.
Equation :To find the wavelength we use the formula,
fλ = c
where,
f is frequency of radio signal
c is speed of light
λ is wavelength
So,
The known values are :
frequency = 1910 MHz
speed of light = 3 x 10⁸ m/s
λ = ?
By rearranging the formula we get,
λ = c / f
Putting values,
λ = 3 x 10⁸ m/s / 1910 MHz
λ = 3 x 10⁸ m/s / 1.91 x 10⁸ Hz
λ = 1.57 m
What is wavelength and frequency?The wavelength, which will also apply to troughs, is the separation between two wave crests. The frequency is measured in cycles per second (Hz), which is the quantity of vibrations that cross a specific area in a second (Hertz). In this article, the relationship between wavelength and frequency is covered.
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A brass plate has a 4.00 inch diameter hole in it. A rod with a diameter of 4.01 inches is to be
threaded through this plate to produce an interference fit. This is to be done by increasing the temperature of the plate, passing the rod through the plate, and then allowing the plate to return to its normal temperature. What must be the temperature change of the plate? (The coefficient of expansion per degree centigrade for brass is “19x10^-6 or 0.000019”)
The change in the temperature of the plate is 160 degree centigrade
What is the superficial expansion?We know that the superficial expansion has to do with the increase in the rea per kelvin rise in the temperature of the plate. The first thing that we must do now is to obtain the area of the plate before and after.
Initial area of the plate in square meters = πd^2/4 = 3.14 * (0.1016)^2/4 = 8.10 * 10^-3 m^2
Final area of plate in square meters = πd^2/4 = 3.14 * (0.1019)^2/4
= 8.15 * 10^-3 m^2
2α = ΔA/A1θ
α = linear expansion
ΔA = change in area
A1 = initial area
θ = temperature change
2(1.9 * 10^-5) = 5 * 10^-5/8.10 * 10^-3θ
2(1.9 * 10^-5) * 8.10 * 10^-3θ = 5 * 10^-5
θ = 5 * 10^-5/2(1.9 * 10^-5) * 8.10 * 10^-3
θ = 5 * 10^-5 /3.1 * 10^-7
θ = 1.6 * 10^2 or 160 degree centigrade
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5. A ball is thrown up in the air with an initial velocity of 11.4 m/s. What is the maximum height in the air the ball will reach?
Answer:
6.50m
Explanation:
Vf=0
Vi=11.4
g=-10(against the gravity)
D=x?
Vf²=vi²+2ad
0²=11.4²+2(-10)d
0=129.96+-20d
-129.96=-20d
-129.96/-20=d
D=6.50m
A centrifuge in a medical laboratory rotates at an angular speed of 3,450 rev/min. When switched off, it rotates through 48.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.
Answer:
Explanation:no
A car passes you going at 15 m/s and accelerating at 0.2 m/s2. Another person farther along on the road observes it traveling at 30m/s. How far are you from the other person?
The distance between myself and the other person is 1687.5 m
What is distance?Distance is the length between two points. The S.I unit of distance is meter(m)
To calculate the distance between me and the other person, we use the formula below.
Formula:
v² = u²+2ad........ Equation 1Where:
v = Final speedu = Initial speeda = Accelerationd = distance between me and the other personFrom the question,
v = 30 m/su = 15 m/sa = 0.2 m/s²Substitute these values into equation 1
30² = 15²+2×0.2×d900 = 225+0.4d0.4d = 900-2250.4d = 675d = 1687.5 mHence, the distance between myself and the other person is 1687.5 m.
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the acceleration of your bike as your ride it home to the store
Your acceleration varies as you travel to the store. Your total speed can change over time; sometimes it can go up, sometimes down. Because doing so would mean you would keep speeding up and eventually pass the store, constant acceleration doesn't happen. In physics, even a decrease in speed is a form of acceleration. When you arrive at it, we can determine how much your average speed was and examine the impact that varying acceleration would have had on it.
According to estimates of the power needed to ride, cyclists deliver about 150 W when riding level terrain, but this increases to about 250 W when cycling up hills. On a flat surface, the average acceleration is 0.231 m/s2, and the acceleration phase has an average duration of 26 seconds. On average, 120 W of power is output during this phase.
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Show transcribed data A vacationer gets into his outboard motorboat and leaves a dock on a river bank for a day of fishing. Just as he turns upstream, he hears a splash but pays no attention and continues cruising at normal speed. Unfortunately, only 25 minutes later does he realize that his (fortunately watertight) lunchbox is missing. He then turns downstream, with the motor still set at cruising speed. Luckily, he sights his lunchbox floating down the river and retrieves it at a point 2.8 km downstream of the dock. 9 How long after turning around does he pick up his lunch? Give your answer in minutes.
It is after a time of 25 minutes that the vacationer picks up his lunch after turning around the dock.
Let the speed of the motorboat be v and the speed of the river be u.
Upstream - The term "upstream" refers to a boat that is moving against the direction of the stream. The boat's upstream speed in this situation is its net speed.
Downstream - A boat is said to be moving downstream if it is moving in the same direction as the stream. In this instance, the boat's downstream speed is its net speed.
Given in the question
Distance travelled downstream = d = 2.8 km
Time = t = 25 mins = 25 × 60 = 1500 seconds
Downstream Speed = v + u
Let the time after he picks the lunch be t' seconds
Distance traveled by boat in t' seconds
d = (v + u )t'
Distance traveled by lunch in t + t' seconds
x = u(t + t')
Upstream Speed = v - u
Distance traveled by boat upstream :
x' = (v-u)t
So accordingly,
x + x' = d
u(t + t') + (v-u)t = (v + u )t'
ut + ut' + vt -ut = vt' + ut'
vt = vt'
t = t'
t' = t = 1500 seconds = 25 minutes
So, the vacationer picks up the lunch 25 mins after turning around.
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Which one of the following is NOT consistent with a car which is accelerating?
Question 13 options:
A car is moving with a high speed.
A car is moving with a decreasing speed.
A car is changing direction.
A car is moving with an increasing speed.
A car moving at a decreasing speed is not consistent with a car that is accelerating. Hence, option B is correct.
What is Acceleration?Acceleration is the general term for any process where the velocity changes. There are just two methods for speeding up : changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.
Its SI unit is m/s² and the dimension is LT⁻² where,
L= length and,
T= Time
Acceleration, a= Velocity/Time
Hence, the car is moving with a decreasing speed will not consistent with a car which is accelerating.
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A box with mass m = 10
kg is pushed up a
slope to a height of h =
10 m. The slope makes
a 8 = 30° angle with
the horizontal and the
friction force along the
slope is f = 5 N. What
is the input work done
on the box?
Answer:
20m
Explanation:
u=20ms−1
v=0
f=μmgcosθ
mgsinθ+f=ma
mgsinθ+μmgcosθ=ma
530+0.5×10×54=a
6+4=a
a=10ms−2
v2−u2=2as
0−202=2×(−10)×s
s=20m