An object that does not allow light to pass through it is

What is the number of complete oscillations of a wave per second

The air in a kitchen has a mass of 60.0kg and a specific heat of 1505J / (kg°C). What is the change in thermal energy of the air when it warms from 24°C to 31°C? A) 90,300J B) 100,835J C) 630,000J D) 632,100J

A researcher wants to show the effects of slight changes in pH on the reproductive rates of fish in a lake. Why would a table be more suitable than a graph to show the data?

Rarefaction occurs only in a ___ wave. A: transverse B: longitudinal C: sympathetic D: forced

How much force is required to accelerate a 2 kg mass at 3 m/s2

How do inertia and centripetal force combine to keep an object moving in circular motion?

Compare and contrast the average kinetic energy of 0.5 L of coffee at 34°C, 0.5 L of coffee at 38°C, and 0.25 L of tea at 43°C.

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5