What is the size of the smallest vertical plane mirror in which a 6 ft tall person standing erect can see her full-length image?

An airplane is flying in a horizontal circle at a speed of 92.1 m/s. The 55.6 kg pilot does not want his radial acceleration to

Fudgin [204]

Answer:

r = 102.43 m

Explanation:

Newton's second law for this case is

F = ma

Where the acceleration is centripetal

a = v² / r

r = v² / a

They indicate that the radial acceleration is 8.45 g

r = v² / 8.45 g.

r = 92.1² / 8.45 9.8

r = 102.43 m

7 0

2 years ago

A capacitor acquires a charge of 0.003 C when connected across a 30-V battery. Its capacitance is _____.

USPshnik [31]

Charge stored in a capacitor given by Q = C*V.

So, C = Q / V.

V=30V, Q=0.003C

C = 0.0001F or 100μF

5 0

3 years ago

Why is it so difficult for astronomers to see new stars in the process of birth?

vekshin1

Birth happens very quickly, so it is hard to "catch" stars in the act. - most stars are born inside dusty clouds, which block any light that may be coming from the stars.

4 0

1 year ago

Defined the term electromagnetic induction and explain how a generator uses electromagnetic induction

tatuchka [14]

Is the production of electricity by magnetic field.

There are two types of generator which is D.C generator . And A.C generator

A.C gen consist of rectangular coil,brushes and permanent magnet

According to the external force mechanical energy used to rotate coil, due to magnetic flux produced by permanent magnet create induced current, this is to according to flemmings right hand rule of electromagnetic induction the rotating coil will produce current

I hope that will help.

8 0

3 years ago

A flywheel in a motor is spinning at 510 rpm when a power failure suddenly occurs. The flywheel has mass 40.0 kg and diameter 75

8_murik_8 [283]

Complete Question

A flywheel in a motor is spinning at 510 rpm when a power failure suddenly occurs. The flywheel has mass 40.0 kg and diameter 75.0 cm . The power is off for 40.0 s , and during this time the flywheel slows down uniformly due to friction in its axle bearings. During the time the power is off, the flywheel makes 210 complete revolutions. At what rate is the flywheel spinning when the power comes back on(in rpm)? How long after the beginning of the power failure would it have taken the flywheel to stop if the power had not come back on, and how many revolutions would the wheel have made during this time?

Answer:

$\theta=274rev$