Physics Practice Test for the HESI® exam
Which of the following is true regarding the way light travels?
Light is a curiosity in that it acts as both a wave and a particle. It only changes direction via reflection (bouncing off of something) or refraction (passing from one medium to another). In a vacuum, the speed of light is constant, but when passing through a medium that has an index of refraction different from a vacuum, light’s speed slows.
According to the theory of the same name, after the “Big Bang” there were only what two things?
The Big Bang Theory attempts to explain the origins of the universe. According to the theory, a “big bang” produced matter and antimatter in equal quantities.
A subatomic particle is which of the following in relation to an atom?
Subatomic particles- which include neutrons, protons, and electrons- are much smaller than atoms.
Who discovered the special theory of relativity?
The Theory of Relativity is one of physics’ most famous and was proposed by Albert Einstein.
A fresh egg will float in water…
Eggs are typically more dense than water, which makes them sink. However, if enough salt is added to the water, the water becomes more dense than the egg, which will cause it to float.
How fast does sound travel through a vacuum?
The speed of sound in a vacuum is 0 m/s because sound waves cannot travel through a vacuum.
What planet is the slowest rotating and often referred to as Earth’s “sister planet?”
Venus is the slowest-rotating planet and is sometimes referred to as Earth’s “sister” because of their similar size and distance from the sun.
A woman has a mass of 50 kg on the moon. What is her mass on Earth?
While the woman’s weight would change due to differences in gravitation force, her mass would remain the same no matter if she was on the Earth or moon.
A ball is at the top of a hill. Which factor, or factors, is responsible for its potential energy?
A ball on a hill would have potential (or stored) energy because of its location on the top of a hill and because of its mass. Recall that gravitational potential energy is the product of an object’s mass, position, and the acceleration due to gravity.
Which of the following is true of a negatively charged particle?
A negatively charged particle has more electrons (which have negative charge) than protons (which have a postive charge).
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