9. Given the formula c=lambda cdot v. .show how you would manipulate this equation to solve for wavelength and for frequency. (Can you show the equation for just wavelength? Just frequency?) square
A wire has a current that flows to the right. Which describes the magnetic field produced by the current? straight lines along the wire to the right moving the same direction of the current straight lines along the wire to the left moving the opposite direction of the current circles around the wire that go in at the top of the screen and moves in a counterclockwise direction circles around the wire that go in at the bottom of the screen and moves in a clockwise direction
The planet whose orbit about the Sun is most inclined is Saturn Mercury Mars Uranus
Water is placed in an ice cube tray and placed in the freezer, tuning it into ice cubes. If water is the system, what will the heat and work values be for the surroundings? a q=-,w=+ b q=+,w=+ C. q=-,w=- d q=+,w=-
The nuclear reaction is (}_{20)^45Caarrow _(2)^4He+underline ( ) for Calcium-45 undergoing alpha decay. a (}_{17)^45Ar b (}_{10)^47Ar c (}_{18)^41Ar d (}_{15)^49Ar A B C D
What is the basis for analyzing an energy transfer diagram? The mechanical energy input and output must be equal. Heat must always be the largest output. The sum of all outputs must equal the input. Electrical energy is an input but not an output.
What does it mean when work is positive? Velocity is greater than kinetic energy. Kinetic energy is greater than velocity. The environment did work on an object. An object did work on the environment.
6. How many kilocalories of heat are required to raise the temperature of 6.500 g of ice from -15.0^circ C to -1.5^circ C ? The specific heat of ice is 2.065J/(g^circ C) (4 points)
When the north pole of a bar magnet is moved into a solenoid, the needle on a galvanometer attached to the solenoid moves to the left, indicating that a current is produced. The magnet is then pulled out at a faster speed. What will be the result? a larger current in the same direction a larger current in the opposite direction a smaller current in the same direction a smaller current in the opposite direction
What is one way radio waves are used? A to carry signals for televisions B to kill germs in hospitals III to treat cancer with radiotherapy
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
