Why are satellites placed into orbit at least 150 km above Earth's surface?

If a body system, such as the digestive system, fails to work properly, what would happen to the organism

When the decibel level of traffic in the street goes from 40 to 60 db, how much greater is the intensity of the noise?

How does bacteria effect cells

A car is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy of the car

An x-ray photon of energy 3.20 * 10-15 j has what wavelength?

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?

It is 5.5 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.0 km/h (which uses energy at 290 W).