Which part of the atom has to stay the same for it to be the same element?

A.) number of neutrons

B.) number of protons

C.) number of electrons

D.) number of protons, neutrons, and electrons

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Explain which of the three types of radiation (alpha, beta, or gamma) is the most dangerous to be exposed to.

What is the best example of reusing

A system in which No matter or energy can enter or exit from the surroundings (matter and energy cannot enter or exit).

Which substance is most likely to heat up the fastest? water (specific heat of 4.19 / g. C°) o copper (specific heat of. 39 / g. C°) o aluminum (specific heat of. 90 / g • C°) o dry air (specific heat of 1.01 / g. cº)

Which of these factors determines soil texture? A. Glacial till B. Particle sizes C. Mineral content D. Water composition

A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends toward the normal, making an angle of 19° with it. The velocity of light in air is approximately 300,000 km/s.

Which best explains the relationship between the speed of sound and the medium through which it passes?

g The magnetic force on a charged particle A. depends on the sign of the charge on the particle. B. depends on the velocity of the particle. C. depends on the magnetic field at the particle's instantaneous position. D.

How fast must a 1000 kg car be moving to have a kinetic energy of 1.0 kWh

Which of the following is used to measure weight? Newtons Liters Kilograms Meters