How to find moment of inertia of hemisphere

The noise from a power mower was measured at 106 dB. The noise level at a rock concert was measured at 115 dB. Find the ratio of the intensity of the rock music to that of the power mower. (Round your answer to the nearest whole number.)

A plane flies along a straight line path after taking off, and it ends up 190 km farther east and 80.0 km farther north, relative to where it started. What is the plane's displacement?

If velocity decreases, mass increases or decreases?

Suppose we hang a heavy ball with a mass 13 kg (so the weight is) from a steel wire 3.9 m long that is 3.1 mm in diameter (radius = 1.55*10-3 m). Steel is very stiff, and Young's modulus for steel is unusually large, 2 * 1011 N/m2.

What is the momentum of a cat mass of 4 kg that is running south with a speed of 1.5 m/s?

Which is the best analogy of a wave? -A wave is like building a ramp. -A wave is like shaking a hand. -A wave is like water rippling in a pond. -A wave is like knocking down a building.

you can produce a sound by plucking a string or by blowing in a pipe. how are these two ways of producing sound are similar

What would provide specific information about the materials in the equipment used in a certain experiment

The wavelength of sound wave is 30 m. Frequency is 7 Hz. What is the wave speed

The blood vessels that carry blood away from the heart to the rest of the body are