J. J. Thomson's experiments provided evidence that an atom

A. is the smallest particle of matter.

B. contains negatively charged particles.

C. has a negative charge.

D. has a positive charge.

The planet earth orbits around the sun and also spins around its own axis. 33% part (a) calculate the angular momentum of the earth in its orbit around the sun in kg • m2/s

How does an electric motor use magnetic force to produce motion? A. The north pole of a permanent magnet placed in the center of an electromagnet attracts the north pole of the electromagnet. B.

How many times does 30.48 go into 106, 650?

Which statement (s) about galaxy groups is/are true? Choose one or more: A. Galaxy mergers in groups are not known to have ever happened B. Galaxies in a group are all moving away from each other. C.

In a 30.0-s interval, 500 hailstones strike a glass window with an area of 0.600m2 at an angle of 45.0°to the window surface. Each hailstone has a mass of 5.00g and a speed of 8.00 m/s.

A mass spectrometer accelerates doubly ionized atoms of charge 2e over a potential difference V before they enter a uniform magnetic field B which is perpendicular to the direction of motion of the ions.

A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120 m starts from rest and accelerates at 30.

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures