How many trees were sold in all during 1999 and 2000?

A U-tube is filled with water until the liquid level is 28cm above the bottom of the tube. An oil of specific gravity 0.

What are global wind patterns called?

The electric motor of a model train accelerates the train from rest to 0.740 m/s in 30.0 ms. The total mass of the train is 560 g. Find the average power delivered to the train during its acceleration.

Physical science was once defined as "the science of the nonliving world." Explain why that definition is no longer sufficient.

Two long parallel wires carry currents of 1.19 A 1.19 A and 4.27 A 4.27 A. The magnitude of the force per unit length acting on each wire is 7.73 * 10 - 5 N / m 7.73*10-5 N/m. Find the separation distance of the wires expressed in millimeters.

A ball is thrown upward with an initial velocity of 48 ft/sec from a height 640ft. It's height h, in feet, after t seconds is given by h (t) = - 16t^2 + 48t+640.

You slide a slab of dielectric between the plates of a parallel-plate capacitor. As you do this, the potential difference between the plates remains constant.

Heat transfer between two substances that are in contact is called

What is the principles of electric motor

A tow truck has a weight of 10,350 N. What is the mass of the tow truck?