Which type of mechanical wave needs a source of energy to produce it?

a. a transverse wave

b. a longitudinal wave

c. a surface wave

d. all of the above

What type of machine are wire cutter pliers? Simple machine. Mechanical machine. Complex machine. Compound machine.

How many birds have tested positive for West Nile virus?

If you are driving an oscillatory system at a certain frequency, but the amplitude is much smaller than it could be, you can be certain that 1. The driving frequency is too low. 2. The driving frequency is too high. 3.

A ball is thrown upward with an initial velocity of 48 ft/sec from a height 640ft. It's height h, in feet, after t seconds is given by h (t) = - 16t^2 + 48t+640.

How will a wave change as it moves from a layer of lower velocity into a lower layer of higher velocity?

Darna rolls the 7.05-kg ball down the lane and it hits the 1.52-kg pin head on. The ball was moving at 8.24 m/s before the collision. The pin went flying forward at 13.2 m/s. Determine the post-collision speed of the ball.

What is the acceleration caused by your push on the ball

In the chemical reaction in which carbon, hydrogen and oxygen absorb heat and combine to form carbon dioxide and water which of the following is considered to be a reactant? A. heat B. water C. oxygen D. carbon dioxide

A box is at rest on a table. What can you say about the forces acting on the box? The upward ___ and the downward___ are balanced Applied force Frictional force Normal force Drag force Gravitational force Tension

When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?