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

Tell how energy is transferred to the building where the heater is located

You kick a soccer ball with a speed of 12 m/s at an angle of 21. How long does it take the ball to reach the top of its trajectory?

An alcohol functional group is called what?

Which of the following statements are true? A Simple machines use electricty B Simple machines are made from only one part C Compound machines are made from two or more simple machines D Compound machines make the job harder

What is the material ability to be desolved in a solvent

If an oscillation is moving up and down in the y-axis and the wave is traveling to the right in the x-axis, what type of wave is this?

What can result if an earthquake causes a sudden vertical change in the sea floor? A. a tsunami B. liquefaction C. soil creep D. sheet erosion

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

I'm completely lost in physics, the Kinematics and dynamics units ... My exam is coming up ... If a biker travelling at 6.4m/s sees biker B 34m ahead on the road travelling 4.7m/s. How far will biker B get before biker A catches him?

When scientists record the volume of a gas, why do they also record the temperature and the pressure