Read about a process that helps shape Earth’s surface. Water on Earth’s surface seeps into rocks. When water in the cracks freezes, it expands and breaks the rocks apart. This process is called frost wedging.

Which spheres interact when this process occurs?

atmosphere, biosphere, cryosphere
hydrosphere, cryosphere, geosphere
biosphere, hydrosphere, cryosphere
cryosphere, atmosphere, geosphere

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?

Describe the work performed by a ski lift in terms of kinetic and gravitational potential energy