The correct answer is 19.7 m/s.
Range is the height of the projectile when it reaches a vertical velocity of zero; after that, gravity will take over and quicken the object's descent. The projectile range, which is determined by the object's initial velocity, is the horizontal displacement of the object projected.
Only when one force is applied at the start of the trajectory does projectile motion occur; thereafter, gravity is the only resistance. A projectile launched under specified beginning circumstances will have a range in physics. Assuming a flat Earth with a consistent gravity field and no air resistance may make it more predictable.
Range R = 38.7 m
Acceleration due to gravity g =9.8 m/s
Launch angle θ = 51
Range of the projectile is given by
R = [tex]u^2[/tex] Sin2θ / g
[tex]u^2[/tex] = gR/ Sin 2θ
u = √gR/ Sin 2θ
u = √ 9.8 × 38.7 / Sin ( 2 × 51)
u = 19.7 m/s.
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What is the SI unit for capacitance?
O farad (F)
O volt (V)
O joule (J)
O ampere (A)
The capacitance value of a capacitor is measured in farads (F)
The SI unit for capacitance is referred to as Farads.
What is Capacitance?This is the ability of a device or circuit to store energy which is usually in
the form of electric charges.
A capacitor on the other hand is the device which performs this function.
The formula for determining capacitance is denoted below:
C = q/V where C is capacitance, q is charges and V is voltage.
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a car initially traveling at 60 km/h accelerates at a constant rate of 2.0 m/s2. how much time is required for the car to reach a speed of 90 km/h? quizlet
Time required for the car to reach a speed of 90 km/h is 4.165 seconds.
To solve for time, use the formula for time, t = d/s which means time equals distance divided by speed.4.165 sec
In light of the posed query,
Initial velocity is 60 km/h, which is 60 x 1000 / 36600, or 16.67 m/s.
90 km/h is equal to 901000/3600, or 25.
2 m/s2 for acceleration, or a.
t = time
We are also asked to determine how long it will take the car to
accelerate to its final speed of 90 km/h.
We are aware,
v = u+at
Given the values we receive,
25 = 16.67 + 2t
2t = 25-16.67
2t = 8.33
t = 8.33/2
t = 4.165 sec
Thus, the car will take 4.165 sec to attain the final velocity of 90 km/h if its acceleration is 2 m/s^2 and initial velocity is of 60 km/h.
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Safety belts protect people in cars in the event of an accident because, according to Newton’s laws of motion, when an impact causes the car to suddenly change its motion -
A.the speed of the people always increases, since now they have not one but two forces acting on them.
B.the speed of the car always increases, giving it greater force since the mass will remain the same.
C.the car now has a greater overall mass - its own mass plus the mass of the object by which it has been struck.
D.the people in the car will continue to move in the same direction and at the same speed as before the impact.
Answer:
D :)
Explanation:
When an impact causes the car to suddenly change its motion, (D) the people in the car will continue to move in the same direction and at the same speed as before the impact.
What is Newton's first law of motion?
Newton's first law of motion states that Unless influenced by an imbalanced force, a body at rest stays at rest, and a body in motion keeps moving in a straight path at a constant pace. This law is commonly known as law of inertia and the resistance of a body to maintain its state of rest is called inertia of rest, same as, the resistance of a body to maintain its state of motion is called inertia of motion.
When a car is moving with certain speed, the car along with the people inside the car is in inertia of motion. In an event of accident, the car comes in rest in no time but the man in the car is still in inertia of motion. So, his body moves forward in the car which may cause injuries. To prevent such injuries, the people inside a car are advised to use safety belts.
So, correct answer is option (D).
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According to Newton’s first law of motion, which of the following objects will change its motion?
A.A train pulling on another train, each with the same amount of force.
B.A bike rider on a smooth and level road, pedaling at a constant rate.
C.A chair sitting on the floor with balanced forces acting in opposite directions.
D.A ball rolling across the floor with friction acting in the opposite direction.
A ball rolling across the floor with friction acting in the opposite direction.
Answer:
D.
Explanation:
the friction will cause the ball to stop moving which is a change
can any one give me a amazon code i will repay you. plz i am trying to buy my mom somin off amazon
Answer:i have none but good luck also this is a learning site ;-;
Explanation:
"El sujeto es emergente de la compleja trama de relaciones vinculares e institucionales que lo determinan. En esa trama, las relaciones tempranas adquieren un lugar fundamental en los procesos de constitución subjetiva" Terigi, Flavia (2010) Sujetos de la Educación. Para el psicoanálisis, ¿cuáles serían esas relaciones tempranas y por qué se afirma que son fundamentales en los procesos de constitución subjetiva?
La respuesta correcta para esta pregunta abierta es la siguiente.
Para el psicoanálisis, las relaciones tempranas son las relaciones a posteriori entre los padres del recién nacido y el bebé mismo. Estas relaciones son fundamentales en los procesos de constitución subjetiva para el discurso parental para entender los aspectos del desarrollo infantil y sus diferentes estados o teorías de desarrollo para ir comprendiendo cada aspecto de la interrelación y el comportamiento entre las partes.
Para el psicoanálisis, el recién nacido está llegando a un núcleo familiar que ya está establecido y se basa en conocimientos, tradiciones y experiencias de los padres que han recibido de generaciones anteriores, y éstas van a influir directamente en la interrelación permanente con los primeros años del crecimiento del bebé.
Science: Please help me with this due in 5 minutes
Answer: Use less water
only turn on lights when needed
electrical cars
less gas usage
Explanation:
This physics problem is kinda complicated to my small brains...
so uh how much work does it take to lift 250kg to 6 meters high
Answer:
[tex]\huge\boxed{\sf P.E. = 14700\ Joules}[/tex]
Explanation:
This work done is in the form of Potential Energy so we'll use the formula of Potential Energy.
Given Data:
Mass = m = 250 kg
Acceleration due to gravity = g = 9.8 m/s²
Height = h = 6 m
Required:
Work Done in the form of Potential Energy = P.E. = ?
Formula:
P.E. = mgh
Solution:
P.E. = (250)(9.8)(6)
P.E. = 14700 Joules
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807How can you determine the qualitative relationship that may exist in a set of
data?
WILL MARK BRAINLEST
Answer:
Qualitative research can identify key variables in which regards as findings. Such findings may put into a conceptual framework or a research framework, later stage, that research framework can be tested via various statistical methods such as correlation, structural equation modelling ect. Because, qualitative research do not prove any significant relationship among variables, but quantitative research do. However, based on data gathered in qualitative research, the researcher can show that there may have some relationships among variables through graphically or by using NVivo qualitative data analysis software.
Explanation:
creds to Roshan Panditharathna
You can determine the qualitative relationship that may exist in data because qualitative describes key qualities and characteristics using questionnaires, observation or interviews. On the other hand quantitative relationships are based off of numbers and are collected using graphs and charts.
Kiana is wearing a black shirt and shiny necklace. While she is outside at recess her shirt absorbs the light waves and gets very hot in the sun, but her necklace reflects the light waves and small circles of light are seen around the yard. What explains why the light waves behaved differently on her shirt than they did on her necklace?
Answer:
Black bodies are good absorber of light waves from the sun, while shining surfaces are good reflector of the light waves.
Explanation:
Generally, a black surface or material tends to absorb light waves while under the sun, while a shiny surface is a good reflector of the waves. This is because the black material is a good absorber, and also a good emitter.
The shiny necklace can only absorb little light waves from the sun, thus it reflects most of the light waves. The reflection is the reason for the small circles of light seen around the yard.
However, when in a cool environment the black shirt would cools faster (good emitter) than the shiny necklace.
Solenoid A has length L and N turns, solenoid B has length 2 L and N turns, and solenoid C has length L / 2 and 2 N turns. If each solenoid carries the same current, rank the magnitudes of the magnetic fields in the centers of the solenoids from largest to smallest.
Rank of the magnitude of the magnetic fields in the centers of the solenoid from largest to smallest is,
[tex]B_{C}\; > B_{A}\; > B_{B}[/tex]
We know that, Magnetic field is directly proportional to Turns (N) and inversely proportional to Length (L) of the solenoid.
[tex]B \propto\frac{N}{L}\;\;\;\;\;------ equation(1)[/tex]
For Solenoid A,
[tex]Length\;(L) = L[/tex]
[tex]Turns\;(N)=N[/tex]
Substitute the value of turns and length in equation(1),
[tex]B_{A} =\frac{N}{L}[/tex]
For Solenoid B,
[tex]Length\;(L) = 2\;L[/tex]
[tex]Turns\;(N)=N[/tex]
Substitute the value of turns and length in equation(1),
[tex]B_{B} =\frac{N}{2L}[/tex]
[tex]B_{A} =\frac{1}{2}\;\frac{N}{L}[/tex]
For Solenoid C,
[tex]Length\;(L) = \frac{L}{2}[/tex]
[tex]Turns\;(N)=2N[/tex]
Substitute the value of turns and length in equation(1),
[tex]B_{C} =\frac{2N}{\frac{L}{2} }[/tex]
[tex]B_{C} =\frac{4N}{L}[/tex]
Describe the magnetic field?The magnetic influence on moving electric charges, electric currents and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field. The magnetic field of a permanent magnet pulls on ferromagnetic substances like iron and attracts or repels other magnets. A magnetic field that varies with location will also exert a force on a variety of non-magnetic materials by changing the velocity of those particles' outer electrons.
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PLEASE HELP ME
Imagine a metal cooking pan with a wooden handle is placed into a 200 °c oven.
Which material (wood or metal) would reach thermal equilibrium most rapidly? Why?
Answer:
The pan because it is directly on there to absorb heat while the handle is there more towards the end and will have heat reaching the start of the handle while the metal is already hot
If car is going at a speed of 80 km/h how far will it travel in two hours
Answer: 160 km
Explanation:
can anyone help me with this question please
Explanation:
V=u+at
where,
v=final speed
u=initial speed,(starting speed)
a=acceleration
t=time
v=u+at = 6=2+a*26=2+2a
2a=6-2
2a=4
a=4/2 = 2
a =2
2. to find time taken
v=u+at
25=5*2t
2t=25-5
2t=20
t=20/2
t=10sec
3. finding final speed
v=u+at
v=4+10*2
=4+20
v=24m/sec
5.v=u+at
=5+8*10
=5+80
V=85m/sev
6. v=u+at
8=u+4*2
8=u+8
U=8/8
u=1
these are your missing values
PLS HELP ILL GIVE BRAILIEST + 20 PTS
What is the displacement of a car which travels at a steady velocity of
60 km/h
(a) for 3 h
(b) for 1/2 h?
Answer:
(a) 180 km
(b) 30km
Explanation:
To find displacement (in this case, kilometers) you need to convert km/h to km, this can be done by multiplying by the amount of hours:
[tex]\frac{60km}{h}*3h=60km*3=180km \\\frac{60km}{h} *h/2 = 60km/2=30km[/tex]
(The h/2 term came from 1/2*h, since half an hour is h*1/2)
What is the weight of a person who has a mass of 60 kg
Answer:
Depends on the grativy of the planet. On Earth is 600 Newtons
Explanation:
W = M . G
W = 60 . 10
W = 600
What is the acceleration of a 7 kg mass pushed by a 3.5 N force?
Answer:
According to Newton's second law of motion, the acceleration of an object equals the net force acting on it divided by its mass, or a = F m . This equation for acceleration can be used to calculate the acceleration of an object when its mass and the net force acting on it are known
Explanation:
Heat transfers through Earth's systems in different ways. In which atmospheric action can we see evidence of conduction? Cold air pushes warm air upward, creating a current. Cold air pushes warm air upward, creating a current. The surface of the Earth heats the air that contacts it. The surface of the Earth heats the air that contacts it. Radiation from the Sun heats the surface of the Earth. Radiation from the Sun heats the surface of the Earth. Air increases in density and sinks back towards the Earth.
Answer:
B. The surface of the Earth heats the air that contacts it.
Explanation:
Conduction is a mode of heat transfer in which energy is transferred from a hot molecule to the neighboring molecules due to contact. Thus, heat energy is transferred from one molecule to another in the process.
Therefore, the air that comes in contact with the surface of the earth heats up by conduction. Since the surface of the earth is heated up due to the radiation from the Sun.
Answer: B.
Explanation: I took the test. Also, after my diagnostic I just wanted to see if my answers were correct lol.
A 1kg cart is accelerating at 2 m/s2 due to a constant force. If that same net force was applied to a cart with twice as much mass, what acceleration would it have?
Answer:1m/s2
Explanation:
Need help quick!!!!
When trying make an object accelerate, what kind of Net force is required?
A. Balanced Force
B. Unbalanced Force
C. Force of Friction
D. Normal Force
How can someone, like myself, share roughly 50% of their DNA with a 1st Cousin?
Your answer:
Answer:
that's your 1st cousin which is your mom or dad's sibling's child sooo when you're that close and that related i would say that that would be the reason why.
Explanation:
hoped that helped!!
Which two factors affect the amount of thermal energy an object has?
What does a step down transformer change in an alternating current
The step down transformer decrease the incoming current's voltage.
Transformers go with the principle of mutual inductance . A changing magnetic field in one circle of wire actuates an electromotive force (EMF) in an adjoining circle of wire, inductively coupled to the primary. In exceptionally fundamental terms, a transformer comprises two coils of wire with tall shared inductance. These coils are electrically isolated whereas they share a common magnetic circuit. In a step-down transformer, there is a decrease in the incoming current’s voltage, where the primary voltage is the incoming voltage whereas the outgoing voltage is considered the secondary. the second coil has fewer windings than the primary, permitting a decrease in voltage within the exiting electrical stream. The primary winding, which is the primary set of coils, interfaces to an alternating-current voltage source, or primary voltage influx. The secondary coil interfaces to the stack, or secondary voltage outpouring, conveying the electrical control absent from the transformer. The substituting current streaming in at the primary voltage makes a substituting magnetic flux. This actuates a similar current within the secondary coil, making a secondary voltage. Here, the diminished number of windings within the secondary coil successfully diminishes the resultant voltage, subsequently “stepping down” the voltage to a lower value whereas keeping up a steady frequency.
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if you know how to SHiFT in sleep how do you do it
Differentiate between
joule and watt
What is the mass in grams of 0.48 mol of platinum,Pt.?
93.64 grams
Explanation:mass of platinum =number of moles x molar mass molar mass = atomic mass of any element ,0.48 ×195.084 = 93.64 grams
In a nuclear reactor, electricity is produced from
Answer:
Nuclear reactors are the heart of a nuclear power plant. They contain and control nuclear chain reactions that produce heat through a physical process called fission. That heat is used to make steam that spins a turbine to create electricity
~+lil more info!+~
What material is used to power a nuclear reactor?
uranium !
All commercial power reactors are based on nuclear fission. They generally use uranium and its product plutonium as nuclear fuel, though a thorium fuel cycle is also possible.
a plane flew for 2 hours at 467 mph
Answer: Plane flew 3,614 miles
Explanation: = (2 × 467) + (5 × 536)=3, 614 miles.
Hope this helps!!! Brainlist? plz
Why are some objects transparent
Because .......
Some light passes through them
All light passes through them
No light passes through them
Which one is correct ?Pls help thank you
Answer:
All light pass through them
Explanation:
hope it helps u :) hv a great day
Why should you care
about air masses?
Explanation:
because
1.Extremely warm masses can lead to heat waves
2.Extremely cold air masses can be just as deadly and costly
3.The"clashing "of different air masses can produce regions of severe weather