2. A block of wood of uniform density floats so that exactly one quarter of its volume is under water. The density of water is 1000 kg/m3. What is the density of the block?

An ambulance travels down a high way at a speed of 75.0 mi/h, its siren emitting sound at a frequency of 400 Hz. What frequency is heard by a passenger in a car travelling at 55.

Two aluminum soda cans are charged and repel each other, hanging motionless at an angle. which of the forces on the left can has the greatest magnitude?

What causes the phases of a new moon

If you send a sound wave of the same wavelength (λ = 2.00 m) through air, helium, and carbon dioxide, describe how the pitch of the sound will compare through each medium.

During which phase change do water molecules form crystal lattice? A. Melting / B. Freezing / C. Boiling / D. Condensing

Ethylene (C2H4) reacts with oxygen gas to produce carbon dioxide and water. 45.0 grams of ethylene reacts, how many grams of carbon dioxide gas will be produced?

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.