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4 years ago

A spacecraft is flying toward the moon. The moonÍs gravitational pull on the spacecraft will ___________.

Physics

2 answers:

kifflom [539]4 years ago

4 0

A. Increase is correct because the statement said the moons gravitational "PULL"

Veseljchak [2.6K]4 years ago

4 0

<span>The correct answer between all the choices given is the first choice or letter A, which is increase. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.</span>

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A drum rotates around its central axis at an angular velocity of 18.9 rad/s. If the drum then slows at a constant rate of 3.73 r

konstantin123 [22]

Answer with Explanation:

We are given that

Initial angular velocity, $\omega_0=18.9 rad/s$

Angular acceleration, $\alpha=-3.73 rad/s^2$

a.We have to find the time taken by drum in coming to rest.

$\omega=0$

We know that

$\alpha=\frac{\omega-\omega_0}{t}$

Using the formula

$-3.73=\frac{0-18.9}{t}$

$t=\frac{-18.9}{-3.73}=5.067 s$

b. $\theta=\omega_0t+\frac{1}{2}\alpha t^2$

Using the formula

$\theta=18.9(5.067)+\frac{1}{2}(-3.73)(5.067)^2$

$\theta=47.88 rad$

$\theta=2743.3 degree$

6 0

4 years ago

The current in a hair dryer measures 21 amps. The resistance of the hair dryer is 8 ohms. What is the voltage?

Korolek [52]

Answer:

168 Volts

Explanation:

Use Ohm's law:

(Voltage) = (Current) x (Resistance)

(Voltage) = 21 A * 8 Ohm = 168 V

8 0

4 years ago

A strip of copper 150 µm thick and 4.50 mm wide is placed in a uniform magnetic field of magnitude B = 0.74 T, that is perpendic

Sophie [7]

Answer:

V = 6.55*10^{-6} v

Explanation:

The number density can be determined by using below formula:

$n = \frac{Bi}{Vle}$

where,

B is uniform magnetic field 0.74

i is current 18 A

V is hall potential difference

l is thickness 150 MICRO METER

e is electron charge 1.6 *10^{-19} C

therefore V can be determined as

$V = \frac{iB}{nle}$

$V = \frac{18*0.74}{8.47*10^{28}*150*10^{-6}*1.6 *10^{-19}}$

V = 6.55*10^{-6} v

8 0

3 years ago

Explain what makes up a circuit .

ANEK [815]

Explanation:

An electrical circuit needs:

a source of electrical power (this could be a power plant or a battery)

a material along which the electricity can flow (this may be a copper wire)

something to power (this could be a bulb)

The circuit is connected in a loop. Then, the source of power pushes electrons around the wire. It lights the bulb and continues in the circuit until it is broken.

A simple circuit lights one bulb. More difficult circuits might have several switches and loops. This would allow different groups of lights to be turned on or off at the same time.

( I hope this was helpful) >;D

Read more: All in a Circuit - What Makes a Circuit?, Battery Power, How a Battery Works, Flat!, Home Circuits, Conductors and Insulators - JRank Articles https://science.jrank.org/kids/pages/232/All-in-Circuit.html#ixzz6qWd5gxGf

5 0

3 years ago

A cannon ball fired horizontally from a cliff has a velocity directed at 60 degrees above horizontal when it hits the ground 3.0

Kamila [148]

Since the ball is fired horizontally, the initial y velocity is zero and the time to hit the ground is the same as if the ball was simply dropped from the cliff. So you can solve the y position function:
$-\frac{1}{2}g t^{2} + h_{o}=0$
giving a height of 44.1m.
The given final velocity vector tells us that the initial x-directed velocity was about 17m/s.

3 0

3 years ago

Read 2 more answers