A child of mass 25kg sits on a merry-go-round. The child is seated 4m from the centre of the merry-go-round and period of the motion is 27.3s. Calculate:

a) the acceleration of the child

b) the centripetal force

Explain the dual theory of light

A car weighing 9,800 N was lifted by a crane to a height of 10 m in 60 s. What power was used?

What is the total resistance of the circuit with a 20 ohm and 30 ohm resistance

What is gravitation.

2. Would you want to minimize or maximize the heat transfer to and from the handrails? Explain your reasoning.

Your car travels 600 miles in 6 hours. You stop the car for lunch for 1 hour and then you continue on your trip for another 14 miles and finish the entire trip in 8 hours. What was your car's average speed while you were driving?

Speed is a vector quantity

The observation location A is located at m. The conventional current running through the wire is 7.5 amperes. In this exercise you will calculate the magnetic field at the observation location due only to segment 4 of the wire.

The wavelength of a light wave can be used to measure which of the following? A. The direction the wave is traveling B. How many photons the wave contains C. How much energy the wave has D. How high the top of the wave is

Sound 1 has an intensity of 38 W/m2. Sound 2 has an intensity level that is 2.5 dB greater than the intensity level of sound 1. What is the intensity of sound 2?