What temperature scale (s) are used most often by scientists?

a. only celsius

b. celsius and kelvin

c. fahrenheit and kelvind. fahrenheit and celsius

Explain why the invention of the microscope led to the discovery of cells.

Which of the following is related to intensity of light in a photoelectric effect? A) Intensity of light is related to work function of the metal. B) Intensity of light is related to frequency of the light.

What is the de Broglie wavelength of a bullet of mass 0.030 kg traveling at 540 m/s? Planck's Constant is 6.63 * 10-34 J⋅s. 4.1 * 10-35 m 3.5 * 10-35 m 2.2 * 10-34 m 1.7 * 10-34 m

If 20 waves of water pass you in 5.0 s and the waves are 2.0 m long, how fast are they moving? 1.0 m/s 4.0 m/s 2.0 m/s 8.0 m/s

What is the mass of a crate if a net force of 12 N gives the crate an acceleration of 0.20 m/s2? 2.4 kg 6 kg 12.2 kg 60 kg

In a circuit, electrons travel in A. a circular path. B. different directions. C. alternating directions. D. the same direction.

Which explains upwelling in the oceans?

Explain in terms of the arrangement of particles the kinetic theory of matter

What is the rate at which energy is transferred?

A person is strolling along a moving walkway at a constant velocity of + 1.00 m/s with respect tot he walkway, which moves at a constant velocity of + 0.50 m/s with respect to the ground.