Why is a block of gold is more dense than a block of iron of equal size?

Explain whether the temperature of a substance must increase when thermal energy is added to the substance

Water's states of matter include steam, liquid and ice. What about water is the same in these states? What can you conclude about what changes and what does not change during a change of state?

You bring a negatively charged rod close to some tiny pieces of plastic. Some of the pieces jump up to the rod, but as soon as they make contact, they immediately fly away from the rod. Explain.

At t = 0.0 s, a runner is moving forward (in the positive direction along the x-axis) at a speed of 7.0 m/s. For 2.0 s the runner accelerates to his left at 0.50 m/s2 and backward at 1.0 m/s2 . What is the runner's position at t = 2.

What is density? a. the amount of matter in a given volume b. the force of attraction between two objects having mass c. the mass of an object multiplied by the force of attraction acting upon it d. the measure of how much matter is in an object

Part A Find the energy U0 stored in the capacitor. Express your answer in terms of A, d, V, and ϵ0. Remember to enter ϵ0 as epsilon_0.

How many discovered planets are there

Why is a block of gold is more dense than a block of iron of equal size?

How much work is required to uniformly accelerate a merry-go-round of mass 1490 kg and a radius of 7.80 m from rest to a rotational rate of 1 revolution per 8.33 s? Model the merry-go-round as a solid cylinder (I = ½ MR2).

What percentage of North American adults may be functioning below their potential due to prolonged exposure to stress