How many experiments are needed to prove a theory

A quantity of gas in a cylinder received 1600j of hear from a hot plate at the same time 800j of work are done on the gas what is the change in the internal energy?

Which feature of a human community is similar to a niche in a biological community? a. A person's location b. A person's habitat c. A person's occupation d. A person's family

7) Sound waves travel with a nominal speed of 340m/s. Calculate the wavelengths of the following musical notes a) C1: 32.7 Hz b) A6: 1760.0 Hz c) B7: 3951.1 Hz

Determine the maximum theoretical speed that may be achieved over a distance of 66 m by a car starting from rest, knowing that the coefficient of static friction is 0.

A woman weighs 580 N. What's her mass?

What were the discoveries of astronomers like Copernicus and Galileo?

A major obstacle to developing good human relations is that

4.) An apartment building is on fire and a guy is trapped on the fire escape ladder. There is a dumpster that is 6.3m away and is filled full of trash, and he is 7m above it.

Calculate the temperature of and power-per-area radiated from a blackbody if the spectral intensity density peaks at (a) gamma rays, λ = 1.50*10-14 m; (b) x rays, 1.50 nm; (c) red light, 640 nm; (d) broadcast television waves, 1.

How has increased energy use associated with scientific advancements affected society? a. It has led to an increase of the concentration of atmospheric carbon dioxide. b. It has led to an increase in hazardous wastes from mining operations. c.