3. The sun is directly overhead at the equator on what day of the year?

A. Solstice

B. Ecliptic

C. Zenith

D. Equinox

12. A space walker conducts a sound experiment on a space walk by striking a tuning fork with a mallet. Instrumentation is used to detect sound waves. Which explains the results of this experiment? A.

A small block of wood of inertia mb is released from rest a distance h above the ground, directly above your head. you decide to shoot it with your pellet gun, which fires a pellet of inertia mp.

A 15.0-kilogram mass is moving at 7.50 meters per second on a horizontal, frictionless surface. What is the total work that must be done on the mass to increase its speed to 11.5 meters per second? (1) 120. J (3) 570. J (2) 422 J (4) 992 J

Calculate the efficiency for each machine, then answer the question. Machine A has an input work of 1,000 J and an output work of 250 J. Machine B has an input work of 500 J and an output work of 350 J.

An engineer in India (standard household voltage = 220 volts) is designing a transformer for use on her upcoming trip to Canada (standard household voltage = 120 volts). If her input coil has 240 turns, how many turns should her output coil have?

Can an object travel at the speed of light? Why or why not?

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present

Danilo is sliding down a slide. What forces are acting on him as he slides