The intensity of a sound describes

a. its speed.

b. its loudness at a particular distance.

c. the distance and medium through which it travels.

d. the medium through which it travels.

Modern telescopes are capable of seeing bright galaxies up to about

A car accelerates from 25 km/hr to 55 km/hr in 30 seconds. What is the car's acceleration

Bjorn is holding a tennis ball outside a second floor window (3.5 meters from the ground) and billie jean is holding one outside a third floor window (6.

When does the velocity and speed of a moving body become identical?

Alpha particles cannot penetrate deeply into solids because they

A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends toward the normal, making an angle of 19° with it. The velocity of light in air is approximately 300,000 km/s.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters