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
What is the relationship between velocity and acceleration? Acceleration is the change in velocity over time. Velocity is the change in acceleration over time. Velocity and acceleration are equal and opposite. Velocity and acceleration have nothing to do with each other.
19. The process by which atomic nuclei spontaneously decay is called relative dating radioactivity erosion deposition 20. The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the daughter product geologic time the half-life the half-time 21. The scientist who developed the theory of evolution was Harry Hess James Hutton Charles Darwin William Smith
Radloactive nuclel undergo decay because they are unstable. a TRUE b FALSE
Which of the following would cause a change in the speed of a sound wave? a the wave being made by a larger vibration b the wave moving through water C the wave changing medium from a gas to a liquid d the wave being made by a smaller vibration e none of the above
A man pulls a vacuum forward 13.6 m with a force of 33.9 N at a $55.0^{\circ }$ angle. How much work is being done to the vacuum by the man? $W=[?]J$
Select the cause of evaporation. Waves from the ocean Energy in the clouds Heat from the Sun Rain on the ground
True/False: The mass of the object affects the rate at which it falls. True False
If more force pushes two surfaces together, then the friction between the surfaces will __ stay the same increase decrease
Which of the following is the ideal way to apply pressure onto pedals? Gently at first and then with full force Stomping with force, so it reacts With your entire body weight behind it By pressing gradually
Select all of the types of electromagnetic waves that are ionizing radiation. gamma infrared microwave ultraviolet X-ray
