During convection of air currents,

a. all air rises.

b. cool air sinks.

c. warm air sinks.

d. air is cooled by a heat source.

Two objects are moving at equal speed along a level, frictionless surface. the second object has twice the mass of the first object. they both slide up the same frictionless inclined plane. which object rises to a greater height?

An isolated box with volume V is initially split into two halves by a partition. One side has gas at temperature T with pressure P and number of molecules N, and the other side has nothing (it is a void).

A 0.05 kg weight is used to accelerate a cart. At t=1 second, the 0.5 kg cart is at x=0.5 m, at rest. At t=2.5 seconds, the cart is at 1.5 m, traveling at 1.3 ± 0.3 m/s.

Waves on a pond are an example of which kind of wave? a. sound b. surface c. deep water d. non-mechanical

Which of the following explains the process of radiation? Question 3 options: when heat gets transferred through objects that are touching when the measurement of heat in the atmosphere goes down when heat gets transferred through electromagnetic

The horsepower unit is commonly used to indicate the power rating of household appliances.

A 50.9 kg box initially at rest is pushed 5.65 m along a rough, horizontal floor with a constant applied horizontal force of 247.25 N. If the coefficient of friction between box and floor is 0.466, find the work done by the applied force.

Which of the following best defines absolute threshold? A. The presence of stimulus for detection. B. The absence of stimulus from detection. C. The weakest amount of stimulus one can detect. D. The greatest amount of stimulus one can detect.

Liquid hazardous wastes are blended in a CSTR to maintain a minimum energy content before burning them in a hazardous waste incinerator. The energy content of the waste currently being fed is 8.0 MJ/kg (mega - joules/kilogram).

Explanation's of E=MC²