A train passes a stationary observer. Which of

the following best describes how the amplitude

and the apparent frequency of the sound waves

heard by the observer change as the train moves

away?

A student pushes a 40 in Block across the floor for a distance of 10 meters how much work was done to move the block A) 4j. B) 40j. C) 400j D) 4,000

The magnitude J of the current density in a certain wire with a circular cross section of radius R = 3.50 mm is given by J = (5.00 ✕ 108) r2, with J in amperes per square meter and radial distance r in meters.

An airliner lands with a speed of 47.0 m/s. Each wheel of the plane has a radius of1.25 m and a moment of inertia of 110kgm2. Attouchdown the wheels begin to spin under the action of friction. Each wheel supports a weight of 1.

At one instant in time, a rock falling off a cliff experiences an upward force from air resistance at a magnitude of 10 N. The rock itself has a mass of 7 kg.

Classify the type of plate boundary where the appalachian mountains formed. how have they changed since their formation

Current always returns to the: a) positive battery terminal b) negative battery terminal

Which processes cause rocks to be exposed at Earth's surface? SC. 7 ... 6.2

Compare and contrast the terms melting and freezing

A medical cyclotron used in the production of medical isotopes accelerates protons to 6.5 MeV. The magnetic field in the cyclotron is 1.9 T.

What is the speed of sound in a vacuum?