If you see a spacecraft moving past you at 90% of the speed of light, and if you are able to watch a clock on the spacecraft, then according to special relativity you will see the clock

Measures a slower course of time

Explanation:

According to the theory of relativity, there is a difference in the time measured by two observers, due to a relative speed difference between them. In other words, you observe that a clock that moves with respect to you will measure a slower course of time than a clock that is at rest in your frame of reference.

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27