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nalin [4]
3 years ago
11

If you know a car is traveling 300 km in 3 hours, you can find its

Physics
1 answer:
alexandr402 [8]3 years ago
5 0

you can find the rate that it is traveling at. r=d/t. r=300/3. which equals 100km per hour

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An astronaut who is repairing the outside of her spaceship accidentally pushes away a 92.9 cm long steel rod, which flies off at
DiKsa [7]

Answer:

V = 0.0723 volts = 72.3 milivolts

Explanation:

The emf induced in the rod is the motional emf due to the magnetic field. This motional emf can be calculated by the following formula:

EMF = V = vBl Sin\theta

where,

V = Motional EMF = ?

v = speed of rod = 12.5 m/s

B = Magnetic Field = 6.23 mT = 0.00623 T

l = Length of rod = 92.9 cm = 0.929 m

θ = angle between v and B = 90°

Therefore,

V = (12.5\ m/s)(0.00623\ T)(0.929\ m)Sin\ 90^o\\

<u>V = 0.0723 volts = 72.3 milivolts</u>

7 0
3 years ago
Which tool would you use to measure the amount of rainfall? a. graduated cylinder b. stopwatch c. scale d. thermometer
Fittoniya [83]

A graduated cylinder measures the volume of a liquid.

A stopwatch measures the amount of time that elapses.

A scale measures the mass of objects.

A thermometer measures the temperature of any object.

Because we are measuring rain, a liquid, we would want to use a tool that would allow us to collect the rain for measuring. Therefore, the tool e would use to measure the amount of rainfall would be A. a graduated cylinder.

5 0
3 years ago
Read 2 more answers
One statement of the first law of thermodynamics is that:___________.
blagie [28]

Answer:

a. the amount of work done on a system is dependent of pathway

Explanation:

The first law of thermodynamics states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system.

ΔU = Q - W

Where;

Q, the net heat transfer into the system depends on the pathway

W, the net work done by the system also depends on the pathway

But, ΔU, the change in internal energy is independent of pathway

Therefore, the correct option is "A"

a. the amount of work done on a system is dependent of pathway

6 0
3 years ago
Which of the following statements are true?
yawa3891 [41]
A. False, because the SI unit for frequency is Hertz, 1 hertz equals 1 wave passing a fixed point in 1 second,

B. True, f and Nu (v)

C. To find the frequency of a wave, divide velocity of wave by wavelength

D. False, the period of a wave is measured in frequency (Hertz)
8 0
3 years ago
Which of the following is a way that microwaves and x-rays are similar?
NISA [10]

Answer:

A

Explanation:

In my opinion I'm pretty sure it's A because WE DO use microwaves and x-rays as techonological uses.

6 0
3 years ago
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