Why is acid rain s major biological concern

When a substance changes from any state of matter to another it is called a. sublimation. b. condensation. c. absolute zero. d. a phase change.

What kind of energy is stored when you squeeze a mattress?

A block measures 3.5 cm long 2.8 cm wide and 1.6 cm deep. the density of the block 2.5 g/cm. calculate the volume of the block.

Charge is placed on two conducting spheres that are very far apart and connected by a long thin wire. The radius of the smaller sphere is 5 cm and that of the larger sphere is 12 cm. The electric field at the surface of the larger sphere is 280 kV/m.

Which object would be considered to be in free fall? one that experiences both friction and centripetal force one that is truly weightless one that is slowed down by air resistance one with only gravity acting upon it

What is the force of attraction between two masses 5kg and 8kg at a distance of 60cm apart. (A) 4.5*10-9N (B) 5.6*10-9N (C) 7.4*10-9N (D) 8.0*10-9N (E) 10.5*10-9N

A 1100 kg car pushes a 1800 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N.

The model that describes a Sun-centered solar system is called theA. laws of motion. B. geocentric model. C. heliocentric model. D. general theory of relativity.

A truck on a straight road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20.0 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.

which of the following best describes the amount of natural resources found here in the united states. coal is the only natural resources found in abundance in the US. Natural resources here are lacking and must all be imported to the us.