How much heat must be added to 4.55 kg of copper to change it from a solid at 1358 K to a liquid at 1358 K? Latent heat of fusion for copper is Lf=20.7*104J/kg.

A boy on a bicycle rides at 21.1 m/s a distance of 87.9 m. How long does it take?

Calculate the mass of a gas with a density of 0.0065 g/cm3 and volume of 260 cm3

A cylinder has a length of 3.23 cm, a diameter of 1.75 cm, and a mass of 69.61 grams. (a) What is the density of the cylinder? (b) Based on its density, of what kind of material might it be made?

Kepler's third law states that the planet's orbital period squared is equal to its mean solar distance cubed. Consequently, the solar distances of the planets can be calculated when their periods of revolution are known.

Which of the following is an example of a group that is both primary and voluntary? A. Two people who have chosen to be friends for over 30 years B. Two coworkers who have been assigned to the same department C.

Why arent insulators allowed in operating rooms

What does Kepler's second law state? A. Planets travel in ellipses. B. Planets sweep equal areas in equal times. C. A planet's apparent backward movement is termed retrograde motion. D.

Why do charges build up in a cloud

How does the wave model of electrons orbiting the nucleus account for discrete energy values?

An ecosystem is all the populations of organisms that live together and A. the microorganisms that depend on them. B. the organisms that generate energy from sunlight. C. the physical factors with which they interact. D.