Who discovered that the proton has a positive charge

A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second? A. 5.1 meters B. 9.8 meters C. 25 meters D. 15 meters

Calculate the force of gravity acting on an object that has a mass of 1.3 kilograms. The object is on Earth soyuz 9.8 m / S 2 for the acceleration due to gravity A 12.7 N B 1270 N C 0.13 N D 7.5 N

Let's now apply our equations for the normal modes of open and closed pipes. On a day when the speed of sound is 345 m/s, the fundamental frequency of an open organ pipe is 690 Hz.

Light with a frequency of 7.18 Ã 1014 hz lies in the violet region of the visible spectrum. what is the wavelength of this frequency of light? answer in units of nm.

What is the distance between rarefactions called

When a the irregularities of one surface come into contact with those of another surface, occurs

What type of wave passes through the spring in the frog toy? Why?

Different kinds of substances have different properties of metals

Magma appears to be rising underneath the mid-oceanic ridges. a. True b. False

The energy required to crack a material