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A boy shoots a rock with initial velocity of 40 m/s straight up from his slingshot. He quickly reloads and shoots another rock in the same way 4.0 s later.
(a) At what time do the rocks meet?
(b) At what height do the rocks meet?
(c) What is the velocity of each rock when they meet?
A boy on board a cruise ship drops a 30.0 g marble into the ocean. what is the terminal speed of the marble
Typical field strengths are a few femoteslas (1fT=10^-15T). An adult brain is about 140mm wide, A reasonable magnetic field is 4.35fT at the sensor. According to this model, what is the current in the brain?
a proton travel with a speed of 5.02106ms in a direction that makes an angle of 60 with the direction of the magnetic
A hypodermic syringe contains a medicine with the density of water, Determine the speed of the medicine as it leaves the needle's tip
20g of Uranium Carbide (UC) of density 13.6 g/cm^3 is mixed with 15g of uranium dioxide of density 11.2 g/cm^3, Determine the atom densities of U-235 and U-238 in the fuel mixture
some types of glass have a range of indices of refraction of about 1.4 to 1.7. What is the range of the polarizing angle
The mass of Venus is 80% that of Earth while its radius is 95% that of Earth. What is the value of the acceleration due to gravity on Venus
In 1581, when Galileo was 17 years old, he noticed one morning at the Cathedral in Pisa (just next door to the leaning tower) that after the chandeliers were lit several of them oscillated back and forth with different amplitudes, How long was the..
A curve of radius 65 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve
A particular guitar string is supposed to vibrate at 203 Hz, other than it is measured to actually vibrate at 208 Hz. By what percentage must the tension in the string be changed to get the frequency to the correct value.
An arrow is launched vertically upward from a crossbow at 97.9 m/s. What is its average speed up to that moment
suppose a 29.9-kg child sits 1.27 m to the left of center on the same seesaw as the problem you just solved in the
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