The energy derived from the digestion of food is __________. a. kinetic energy b. inertia c. momentum d. chemical energy
1. A diagram that shows the sun at the center of the solar system is known as a? A) geocentric model. B) heliocentric model. C) universe model. D) earth moon sun model. 2. Why do the planets not travel in a straight path?. A) The forces of inertia and gravity cause them to move in a elliptical orbit around the Earth. B) The forces of inertia cause the planets to move in curved paths around the sun. C) the forces of inertia cause the planets to move in curved paths around the sun. D) the forces of gravity and inertia combine to produced elliptical orbits around the sun. E) all of above.
What kind of motion indicates a system where the net force equals zero only accelerating objects only stationary objects both accelerating and stationary objects only objects moving with a constant positive velocity stationary objects as well as objects moving with a constant velocity
Which statement about electrons and atomic orbitals is NOT true? An electron has the same amount of energy in all orbitals. An orbital can contain a maximum of two electrons. An electron cloud represents all the orbitals in an atom. An atom’s lowest energy level has only one orbital.
Which statement correctly defines displacement? A) the maximum distance between the starting point and the ending point of a motion B) the shortest distance between the starting point and the ending point of a motion C) the maximum distance between the starting point and the ending point of a motion, measured in the direction of motion D) the distance vector between the starting point and the ending point of a motion E) the distance vector between the ending point and the starting point
To increase the brightness of a desk lamp, a student replaces a 50-watt incandescent lightbulb with a 100-watt incandescent lightbulb. Compared to the 50-watt lightbulb, the 100-watt lightbulb has (1) less resistance and draws more current (2) less resistance and draws less current (3) more resistance and draws more current (4) more resistance and draws less current
The _____ is the region of the Sun where energy moves through circulating currents of gases. photosphere, corona, core, radiative zone, chromosphere, or convective zone
Clothes in a dryer acquire static cling by a. friction. b. conduction. c. induction. d. static discharge.
In which situation is the object experiencing unbalanced forces? A) A box resting on a horizontal floor. B) A car slowing as it reaches a traffic light. C) A car with its cruise control set to 30 km/h. D) A penny at terminal velocity after falling off of a building.
Two polarizers are arranged as shown. How much light will reach point X? 0% less than 50% but more than 0% 50% 100%
Heat can never flow from __________. a. hot to cold b. cold to hot c. liquid to solid d. solid to liquid
Which of the following statements is untrue in regard to sound traveling in air? A. As the distance from the Earth increases, the sound wave intensity also decreases due to the lessening density. B. The area covered by the wave front increases as the wave advances, but the energy passing through a wave front in a unit of time decreases. C. During a single vibration of the diaphragm, molecules in the air near it will also complete one vibration. D. Sound waves in the air are transverse and consist of compressions and rarefactions of air molecules.
What would we need to know to calculate both work and power? (2 points) energy, force, and time force, distance, and time force, mass, and distance mass, force, and energy
Which of the following statements is a consequence of the equation E = mc2? A. Energy is released when matter is destroyed. B. Mass and energy are equivalent. C. The law of conservation of energy must be modified to state that mass and energy are conserved in any process. D. all of the above
In order for work to take place Select one: A. the energy present must be related to the movement of the object. B. the force applied must be a balanced force resulting in motion of the object. C. the force applied must cause the movement of the object in the same direction as the force. D. the movement of the object must be the cause of the force.
8.Why are objects that fall near Earth’s surface rarely in free fall? Gravity does not act on objects near Earth’s surface. Air exerts forces on falling objects near Earth’s surface. The objects do not reach terminal velocity. The objects can be pushed upward by gravity.
A metal bolt with a mass of 8.50 x 10^-2kg and a temperature of 85.0 degrees Celsius is placed in a container of water. The mass of the water is 0.150 kg, and its temperature is 25.0 degrees Celsius. What is the specific heat capacity of the bolt if the final temperature of the bolt and water is 28.4 degrees Celsius? (Cp.w = 4186 j/k* degree Celsius)
Why would you expect sodium (Na) to react strongly with chlorine (Cl)? 1. They both need to lose one electron. 2. They both need to gain one electron. 3. Sodium needs to lose one electron, and chlorine needs to gain one electron. 4. Sodium needs to gain one electron, and chlorine needs to lose one electron.
Which rigid transformation would map abc to edc? a rotation about point b a reflection across the line containing cb a reflection across the line containing ac a rotation about point c?
Which scenario best describes motion? a toy train in position 4 on a number line a race track that is 100 meters long a ball rolling from point A to point B a student living 150 miles from Chicago
Which is an example of transforming potential energy to kinetic energy? Check all that apply. changing thermal energy to electrical energy changing chemical energy to thermal energy changing nuclear energy to radiant energy changing radiant energy to electrical energy changing mechanical energy to chemical energy
What distinguishes mass from weight? a. mass is a measure of the amount of matter in an object, while weight is a measure of the force of gravity on the object. b. weight is a measure ofthe amount of matter in an object, while mass is a measure of the force of gravity on the object. c. mass is a measure of an object's inertial force, and weight is the force exerted by that object on other objects. d. mass and weight are synonyms and ultimately describe the same principle?
When a wire is made smaller, the resistance increases. Which happens to the electric current? A) The current decreases. B) The current increases. C) There is no effect on the current
Which of the following statements is a consequence of the equation E = mc2? A Energy is released when matter is destroyed. B Mass and energy are equivalent. C The law of conservation of energy must be modified to state that mass and energy are conserved in any process. D all of the above
1. The path of motion of a thrown javelin is an example of (blank) motion. 2. The acceleration of an object is equal to net (blank) acting on the object dividing by the objects (blank) 3. The pressure exerted by a fluid at any given depth is exerted (blank) in all directions. 4. A 38 kg canoe broke free of its dock and is now floating at a speed of 2.2 m/s. What is the canoe's momentum? 5. please explain this equation in words.
One degree Celsius indicates the same temperature change as? A. One degree Fahrenheit B. 5/9 degree Fahrenheit C. One Kelvin D. 9/5 Kelvin
When discussing discordant and harmonious sound waves, which statement is false? A. Low ratios of the frequencies of the original and resultant waves indicate discordant waves. B. If the original waves combine to form irregular displacements of air, the sound will be discordant. C. Knowing the frequencies of the original waves is useful in determining if the result will be discordant or harmonious. D. Both types of waves are the result of component waves with different frequencies.
Most of the circuits in your home are a. parallel circuits. b. switch circuits. c. series circuits. d. reversible circuits.
For INELASTIC collisions, which of the following statements can be true? Choose all that apply. Momentum is conserved. Momentum is lost. Kinetic energy is lost. Momentum is gained. Kinetic energy is conserved. Kinetic energy is gained.I put a and c and it says it wrong down to my last tries.