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Donovan Orozco
Physics
If you were trying to kill a fish with a laser beam, would you aim where you see the fish?
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Ronin Ho
Physics
Buffy is rolling along in her 10.4 kg wagon at 3.4 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.7 m/s relative to the ground. This causes her wagon to go speeding forward at 8.04 m/s relative to the ground. How much does Buffy weigh
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Dayanara Beasley
Physics
What is the dose of radiation received by an employee whose assigned duties involve exposure to radiation and radioactive material?
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Maxim Miles
Physics
A major leaguer hits a baseball so that it leaves the bat at a speed of 30 m/s at an angle of 36.9° above the horizontal. The bat is at a height of 1.2 m when it hits the baseball. Ignore air resistance. a) What is the time of flight of the baseball? b) What is the maximum height of the baseball? c) What is the horizontal distance the baseball flies? d) What are the components of the velocity of the baseball just before it lands on the ground? e) What is the final magnitude and direction of the baseball? f) At what two times is the baseball at a height of 10 m? g) What are the components of the velocity at the two times in part (f) ?
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Kingston Vega
Physics
When a pair of enantiomers is treated with a single (pure) enantiomer of another compound, the resulting mixture is?
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Vazquez
Physics
Why do objects repel and attract?
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Rubio
Physics
Which scientist is not known for his work with electricity? A. Edison B. Franklin C. Van de Graaff D. All of these people contributed to our understanding of electricity.
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Lowery
Physics
400.0 mL of a gas is collected at 745.0 mm Hg. What will the volume be at standard pressure
(Std pressure = 760.0 mm Hg) ?
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Guest
Physics
Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water with an initial speed of 15.0 m/s strikes the water with a speed of 24.8 m/s independent of the direction thrown. (Hint: show that $$K_i + U_i = K_f + U_f) $$
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Huber
Physics
how do you relate between magnetic field from current carrying wires with the force felt by a current carrying wire?
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Pebbles
Physics
What happens when a roller coaster car moves down from the top of a hill?
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Malia Pittman
Physics
What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 35.0 cm?
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Jonathon Schultz
Physics
Select the correct answer.
The chart gives the number of cases of polio between 1937 and 2011. Polio is an infectious disease that causes paralysis and sometimes death. The polio vaccine was introduced in 1955. What can be concluded about the polio vaccine?
a graph giving the number of cases of polio between 1937 and 2011 shows the polio vaccine introduced in 1955 and the number of polio cases tapering to zero through 2011
A.
It was successful in eradicating polio from the United States.
B.
It had no effect on the number of polio cases in the United States.
C.
It reduced the number of polio cases, but deaths from polio stayed constant.
D.
It initially lowered the number of polio cases, but the number of US cases remains high.
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Oliver Duran
Physics
Calculate the mass of an object that has 150 J of gravitational potential energy if it is 5.0 m above the ground
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Ashton Johnson
Physics
A school bus takes 0.53 hours to reach the school from your house. If the average speed of the bus is 19km/h, what is the displacement of the bus during the trip?
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