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Dennis Fernandez
Physics
A motor-driven winch pulls a 50.0 kg student 5.00 m up the rope at a constant speed of 1.25 m/s. how much power does the motor use in raising the student? how much work does the motor do on the student?
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Carley Pugh
Physics
By what percent must one increase the tension in a guitar string to change the speed of waves on the string from 301 m/s to 343 m/s?
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Abigayle Pierce
Physics
A plane is traveling from one location to another 10,000 miles away. If the plane travels at a speed of 575 miles per hour, how long will it take to get there?
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Tamia Clements
Physics
At the bow of a ship on a stormy sea, a crewman conducts an experiment by standing on a bathroom scale. In calm waters, the scale reads 183 lb. During the storm, the crewman finds a maximum reading of 230 lb and a minimum reading of 138 lb. A. Find the maximum upward acceleration experienced by the crewman
B. Find the maximum downward acceleration experienced by the crewman
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Dayami Newton
Physics
A 1.5m wire carries a 2 A current when a potential difference of 52 V is applied. What is the resistance of the wire?
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Eileen Crosby
Physics
StarsA. begin as protostars, which fire up when they collapse and become denser and hotter. B. create elements by splitting the nuclei of small atoms into the nuclei of larger atoms. C. have unlimited amounts of fuel and therefore exist indefinitely. D. all explode cataclysmically when they die and contribute their matter to future star generations
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Valentino Crawford
Physics
The "atomic weight" of an atom reflects the average number of
A) protons.
B) neutrons.
C) electrons.
D) protons + neutrons.
E) protons + neutrons + electrons.
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Dana
Physics
How fast would a 2-kilogram object need to move to have the same kinetic
energy as a 4-kilogram object moving at 8 meters per second?
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Daniella Spencer
Physics
The frequency of the George Washington Bridge is 2.05 Hz. What is its period?
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Oswaldo Glenn
Physics
Is speed and average speed the same thing?
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Saige Norris
Physics
Explain constellations and galaxies in detail.
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Archie
Physics
A vw bug is driving north on a striaght two lane road at a constant 38mph and a chevy impala is driving south at 29mph on the same road heading toward the vw bug (but in a different lane). What is the velocity of the vw bug relative to the chevy impala?
A. 67mph, south
B. 67mph, north
C. 9mph, north
D. 9mph, south
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Laurel Waters
Physics
Ptolemy and Copernicus were astronomers who had proposed theories about the solar system. Ptolemy believed that the planets and the sun orbited Earth. Copernicus believed that Earth and other planets circled a stationary sun. Which of these statements best explains why Ptolemy and Copernicus made different observations about the solar system?
They studied outdated theories and evidences.
They had different backgrounds and interests.
They used incorrect methods of experimentation.
They made errors in their scientific calculations.
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Tanya Knox
Physics
A TV draws 0.867 A of current when connected to a 122 V outlet. It's resistance is 140.71.
A.) How many electrons pass through the TV per minute?
B.) How much electrical energy does the TV convert to other forms of energy
per minute?
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Caitlin Brown
Physics
If the pig can move the car 30 meters in 10 seconds then what is the speed for the car
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