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
Vsevolod [243]
3 years ago
12

A ball is dropped from the top of a tall building. As the ball falls, the upward force of air rsistance becomes equal to the dow

nward pull of gravity. When these two forces become equal in magnitude the ball will: a) flatten due to the forces b) fall at a constant speed c) continue to speed up d) slow to a stop
Physics
1 answer:
iren [92.7K]3 years ago
5 0
Fall at a constant speed

You might be interested in
What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally h
zysi [14]

Complete question:

What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field 0.425 T. (This is 60 rev/s.)

Answer:

The peak emf generated by the coil is 15.721 kV

Explanation:

Given;

Radius of coil, r = 0.250 m

Number of turns, N = 500-turn

time of revolution, t = 4.17 ms = 4.17 x 10⁻³ s

magnetic field strength, B = 0.425 T

Induced peak emf = NABω

where;

A is the area of the coil

A = πr²

ω is angular velocity

ω = π/2t = (π) /(2 x 4.17 x 10⁻³) = 376.738 rad/s =  60 rev/s

Induced peak emf = NABω

                               = 500 x (π x 0.25²) x 0.425 x 376.738

                               = 15721.16 V

                               = 15.721 kV

Therefore, the peak emf generated by the coil is 15.721 kV

5 0
3 years ago
An ac power generator produces 73.37 a (rms) at 4623 v. the voltage is stepped up to 105,033 v by an ideal transformer, and the
evablogger [386]

Step up transformer is a device which is used to step up the voltage which is input with some value.

This is based upon the principle of mutual inductance and in this the voltage input and voltage output is different because of number of turns.

Here if ideal transformer is given then power input and power output of the transformer must be same as there is no power loss in ideal transformer.

So we can write

i_pV_p = i_sV_s

here

i_p = 73.37 A

V_p = 4623 V

V_s = 105033 A

now using above equation we will have

73.37*4623 = 105033*i_s

solving above we will have

i_s = 3.23 A

7 0
3 years ago
What is the Unit used to measure voltage
muminat
The derived unit for voltage is named volt.
3 0
3 years ago
Can someone please help meee!!
Paraphin [41]

The answer is 9800 J/S

5 0
3 years ago
The cement bag shown in the figure has a mass of 50 kg and the small pulley has a mass of 2 kg. If the cement bag is pulled upwa
GuDViN [60]

For the cement bag we can say as per its force diagram we will have

2F - mg = ma

here we will have

m = 50 kg

a = 2 m/s^2

now we will have

F = \frac{mg + ma}{2}

now plug in all data

F = \frac{50(9.8 + 2)}{2}

F = 295 N

so the pulling force will be 295 N

3 0
3 years ago
Other questions:
  • A negative charge of - 8.0 x 10^-6 C exerts an attractive force of 12 N on a second charge that is
    8·2 answers
  • A ball is thrown straight up from a point 2 m above the ground. The ball reaches a maximum height of 3 m above its starting poin
    10·1 answer
  • What is the momentum of a kid that is 23.3 kg and is running 2.1 m/s
    6·1 answer
  • A certain wire has a length l and a resistance r. It is stretched uniformly to a length of 2l. The resistance of the wire after
    12·1 answer
  • Preparing an Accounts Payable Schedule Pilsner Inc. purchases raw materials on account for use in production. The direct materia
    7·2 answers
  • An alternating current is set up in an LRC circuit.
    15·1 answer
  • Adiabatic Equation of State Derive the adiabatic equation of state (2.3.19) using particle conservation (2.3.7) and energy conse
    9·1 answer
  • A speedboat is moving at a rate of 45 km per hour travels a distance of 27 km. How long did it take to go to 27 km.
    15·1 answer
  • Two runners start at the same point and jog at a constant speed along a straight path. Runner A starts at time t = 0 s, and Runn
    8·1 answer
  • Which of the following is a result of sea floor spreading?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!