Astronauts on a distant planet set up a simple pendulum of length 1.20 m. the pendulum executes simple harmonic motion and makes 100 complete oscillations in 450 s. what is the magnitude of the acceleration due to gravity on this planet?

Magnitude of the acceleration due to gravity on the planet = 2.34 m/s²

Explanation:

Time period of simple pendulum is given by

         , l is the length of pendulum, g is acceleration due to gravity value.

We can solve acceleration due to gravity as

Here

  Length of pendulum = 1.20 m

  Pendulum executes simple harmonic motion and makes 100 complete oscillations in 450 s.

  Period,

Substituting

Magnitude of the acceleration due to gravity on the planet = 2.34 m/s²

the answer is b, have negligible mass

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