Which of the following describes the effect of beam filtration on the x-ray spectrum? It increases the number of low-energy photons It decreases the average energy of the beam It increases the average energy of the beam It increases patient dose
33. What are the two ways that light quality can be characterized? direct or indirect light bright and dim light hard and soft light round and curved light
Hydroplaning is when __ you utilize water driving techniques in the rain to drift your wheels lose traction on the road and your car skids you engage your brakes over the water and drift your car glides over shallow water
The rays from the Sun that tan our skin are called __ infrared rays visible light ultraviolet rays gamma rays
As an electromagnetic wave travels through vacuum, it __ reduces in speed releases photons propagates as a transverse wave loses energy
Why are some EMR types invisible to human eyes? They travel faster Their wavelengths are too long or short They reflect light They absorb sunlight
What is the change in atomic number when an atom undergoes beta emission? Increases by 1 Decreases by 1 Increases by 2 Decreases by 2
What is the rest position of particles in a wave called? Crest Trough Equilibrium position Peak
Only __ nuclei disintegrate on their own, giving out radiation. stable unstable irregular spherical
Which of the following is a mechanical wave? Light wave Sound wave Radio wave Gamma wave
$\square $ Answer Bank KE: 1000.0 J PE: 3000.0 J KE: 0J $PE:4000.0J$ KE: 2000.0 J PE: 2000.0 J KE: 4000.0 J PE: 0J
Learning Log: How do you think you get something to have more kinetic energy?
If a UV light unit has four lamps in it, and each lamp is 7-watt, it is known as a __ 7-watt unit 28-watt unit 11-watt unit 3-watt unit
10. What is the mass of a meteorite that is traveling towards Earth at $1,760m/s$ with a momentum of $33,400kgm/s$
Where is the energy coming from in the lab (where does it start)? A Potential energy in the Cheeto B Potential energy in the water C Kinetic energy inside the water D Kinetic energy in the Cheeto
What should happen to the temperature of the water? A It stays the same B It goes down C It goes up
9. Your local weather report announces that the barometric pressure is 30.44 inHg. Convert this pressure to psi, atm torr, and Pa.
Express the temperature, 275.18 K in degrees Celsius. $548.33^{\circ }C$ $274.17^{\circ }C$ $2.03^{\circ }C$ $120.88^{\circ }C$ $22.78^{\circ }C$
Hubble's Law has led physicists and astronomers to the hypothesis that the universe is expanding. True False
Newton determined that the force of gravity on an object is proportional to its mass causing its mass to be canceled out (Newton's second law) and resulting in a constant acceleration. If the laws of physics are universal, then Newton should be able to apply his discoveries about gravity on Earth to the motion of the planets in our Solar System. Newton's third law says that for every force there is an equal reaction force in the opposite direction. What does this imply about the force of gravity associated with a person standing on the Earth? Choose one: A. The force of gravity on the person cancels out to zero. B. The Earth's gravity pulls downward on the person but also pushes upward on them. C. The Earth's gravity pulls downward on the person, and the person's gravity pulls upward on the Earth. D. There is twice as much gravitational force on the person than there would be if it weren't for Newton's third law.
