1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tia_tia [17]
3 years ago
10

A roller coaster is at the top of a hill and rolls to the top of a lower hill. if total energy is conserved, on the top of which

hill is the kinetic energy of the roller coaster larger?
Physics
1 answer:
mel-nik [20]3 years ago
3 0
The lower hill has higher kinetic energy.
You might be interested in
Plzzzzzz help!!!!!!struggling
wel
Metamorphic rock
Coal
Changes in pressure.
the matching will be in comments

4 0
3 years ago
Read 2 more answers
6.7.1 Current and Current Density A sphere of radius 10 mm that carries a charge of 8 nC =8x 10°C is whirled in a circle at the
aev [14]

Answer:

Part a)

Rate of charge flow is known as electric current

Part b)

Average current flow is

i = 4\times 10^{-7} A

Part c)

As we know that current density is current per unit area

j = 1.27 \times 10^{-3} A/m^2

Explanation:

As we know that angular frequency of rotation is

\omega = 100\pi rad/s

now by basic definition of electric current

Part a)

Rate of charge flow is known as electric current

i = \frac{dq}{dt}

so here we have

i = \frac{Q}{T}

i = Qf

Part b)

here we know that

\omega = 2\pi f

100\pi = 2\pi f

f = 50 Hz

now we have

i = (8\times 10^{-9})(50)

i = 4\times 10^{-7} A

Part c)

As we know that current density is current per unit area

So we have

j = \frac{i}{A}

j = \frac{4\times 10^{-7}}{\pi(10\times 10^{-3})^2}

j = 1.27 \times 10^{-3} A/m^2

6 0
3 years ago
How many joules are in 10,000 Electron Volts
Semenov [28]
1.602177e-15 joules are in 10,000 electron volts

5 0
3 years ago
Read 2 more answers
A rocket is launched from atop a 101 foot cliff with an initial velocity of 116 ft/s.
Katen [24]

Answer:

A. 16t2 -116t -101=0 B. 8.0s

Explanation:

Known parameters from the question:

Height of Cliff,h0 = 101ft

Velocity of rocket ,v= 116ft/s.

1.Substituting the above to the above formula we have;

h(t) = -16t2 + vt + h0

Since h(t) =0, it means the rocket is falling towards the ground, when it gets to the ground when it's at rest the height h(t) = 0m

{Note the rocket is launched from the height of the Cliff so that would be the initial height of the rocket,h0}

2.Substituting into h(t) = -16t2 + vt + h0

We have;

0 = -16t2 + 116t + 101=> 16t2 -116t -101=0

Using formula method for solving quadratic equation we have;

t = -(-116)+_√[(-116)^2 -( 4× 16 ×-101]/ (2× 16)

t = [116 +_(141.1382)]/32

t = (116 -141.1382)/32 or (116 +141.1382)/32

-0.786s or 8.036s

-0.8s or 8.0s to the nearest tenth.

Now time cannot be negative in real life situation hence the time is 8.0s

Note : the general equation of a quadratic equation with variable t is given below;

at2 + bt + c=0

Formula method for quadratic equation is :

t =( -b+_√[(b^2 -( 4× a×c)] ) / (2× a)

6 0
2 years ago
Sounds waves are an example of which type of wave? Longitudinal Transverse O Electromagnetic​
erastova [34]

Answer:

Happy now?

Explanation:

Correct answer:

Sound waves are longitudinal waves, meaning that the waves propagate by compression and rarefaction of their medium. They are termed longitudinal waves because the particles in the medium through which the wave travels (air molecules in our case) oscillate parallel to the direction of motion.

8 0
2 years ago
Other questions:
  • 13.<br>14. Why does a person feel weightlessness during freefall?​
    7·1 answer
  • when a ball is dropped it is easy to see that earth exerts a force on it. why cant you tell that the ball exerts a force on it.
    7·1 answer
  • A pipe that is open at both ends and a tuning fork of frequency 240 Hz are being used as a fancy new thermometer, albeit one tha
    6·1 answer
  • A runner drank a lot of water during a race. What is the expected path of the extra filtered water molecules?
    12·1 answer
  • A condition that affects the ability to sleep or the quality of sleep is referred to as a __________.
    8·2 answers
  • HURRYYYY pls help due today n i be giving brainliest!!!<br><br><br> n no mfkn links plsss
    7·1 answer
  • Describe the energy conversion in each of these scenarios: a plant using photosynthesis to make food, using a battery-powered fl
    13·1 answer
  • If you applied a force of 200 Newtons to lift a box 2.20 meters above the floor, how much work would you be doing?
    6·1 answer
  • Someone solvw this for me please
    5·1 answer
  • Please help me with this rotation and linear motion problem
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!