Question 3: how can an object have an acceleration?

a.â the objectâs speed is decreasing

b.â the objectâs speed is increasing

c.â the object is changing direction

d.â answers

a. and

b. are true, but not

c. e) â answers a), b), and

c. are all true

How often does the earth revolve around the sun?

Jenny and Fred both play a long note on their trombones. A stationary observer hears the sound increasing and decreasing repeatedly in loudness. Which of these must be true? A.

Explain when a falling object is in free fall.

Chef tom works in a very busy restaurant. he cooks for 100's of people each night. why chef tom would use a copper pot instead of an aluminum pot?

A 45.0-kg person steps on a scale in an elevator. The scale reads 460 n. What is the magnitude of the acceleration of the elevator?

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.

The amplitude of a sound is the Group of answer choices frequency of the sound. magnitude of displacement of a sound pressure wave. psychological aspect of sound related to timbre. amount of sound energy falling on a unit area.

Air at 38°C and 97% relative humidity is to be cooled to 18°C and fed into a plant area at a rate of 510 m/min. a. Calculate the rate (kg/min) at which water condenses. b.