What happens to wavelength as a wave leaves the air and enters the Perspex?

a. It decreases

c. It stays the same

b. It increases

d. It becomes irregular

Is there any terminal identification mark for rheostat as positive, negative?

Why might scientists conduct multiple trial experiments rather than rely on a single trial?

It's important to match your exercise shoes with the type of exercise in which you will be participating. True or false?

A spring with k = 500 N/m stores 704 J. How far is it extended from the equilibrium position

How much time does it take for a plane To fly 5000 miles if the plane travels a speed of 500 miles per hour?

The diagram below shows rock is affected when water enters cracks in rock, freezes and becomes ice

A vertical piston-cylinder device contains a gas at a pressure of 100 kPa. The piston has a mass of 5 kg and a diameter of 12 cm. Pressure of the gas is to be increased by placing some weights on the piston.

Evaluate the force of a skateboard exerts on you if your mass is 60kg and you push on the skateboard with a force of 60N

Select all the expressions below which represent a 20% discount off the price of an item that originally costs d dollars. A. 0.8d B. d-0.2 C. d-0.2d D. 1-0.2d

Life cycle of a medium mass star