A train travels 90 kilometers in 2 hours, and then 66 kilometers in 2 hours. What is its average speed?

This is a computer program, why is there an error between the computer values and the nominal values of R?

suppose you had two small boxes, each containing 1.0 g of protons. (a) If one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!

If you heat a magnet above a certain temperature, it will lose its magnetic field. True False

A direct result of the Newlands reclamation Act was the

When a train is traveling along a straight track at 2m/s, it begins to accelerate at a=60v^-4 m/s^2, where v is in m/s. Determine its velocity and the position 3s after the acceleration.

In a laboratory experiment, a diffraction grating produces an interference pattern on a screen. If the number of slits in (including the slit spacing) the same, then The fringes stay the same brightness and get closer together.

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate

In four-seater countries, temperature drops below 0 ° C during peak winter. Why only the frozen surface of the water instead of the whole river and the lake freezes?

Which type of circuit is more useful and why

how much current is in a circuit that includes a 9-volt battery and a bulb with a resistance of 3 ohms?