Gamma-ray bursters emit pulses of gamma rays with high energies. The frequency of the most energetic pulses has been measured at around 3.0 x 1021 Hz. What is the wavelength of these gamma rays?

The 4.0-kg head of an ax is moving at 36 m/s when it strikes a log and penetrates 0. 03 m (3 cm) into the log. What is the average force the blade exerts on the log?

How much time would it take to go up to the moon and back

Which object extends farther from the nucleus of the Milky Way galaxy? The spiral arms The halo The bulge The disk

In which state is the density of matter greater?

Which of the following statements about an object traveling at terminal velocity is true? A. The object is accelerating. B. The object is not accelerating. C. The object's velocity is zero. D. Unbalanced forces are acting on the object.

What produces an electromagnetic wave? A) An oscillating or accelerating electric charge B) An electric charge moving at constant velocity C) A static electric charge D) A magnetic monopole moving at constant velocity

A physics book has a height of 25.8 cm, a width of 20.2 cm, and a thickness of 2.90 cm. (a) What is the density of the physics book if it weighs 20 N? kg/m³ (b) Find the pressure that the physics book exerts on a desktop when the book lies face up.

A 24 volt battery is connected to a 3Ω resistor and a 5Ω resistor in series. What is the current in the circuit?

Two technicians are discussing a problem where the brake pedal travels too far before the vehicle starts to slow. Technician A says that the brakes may be out of adjustment.

What are three types of muscle fibers? A.) smooth, intermediate-twitch, cardiac B.) slow twitch, intermediate twitch, fast twitch C.) smooth, cardiac, skeletal D.) slow twitch, fast twitch, involuntary