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A passenger on a stopped bus notices that rain is falling vertically now outside the window. When the bus moves by constant velocity, the passenger observes that the falling raindrops are now making an angle of 15 with respect to the vertical.
1. What is the ratio of the speed of the raindrops to the speed of the bus?
2. Find the speed of the raindrops, given that the bus is moving by a speed of 18 m/s?
A cosmic ray has a lifetime of 2 mirco seconds. At what minimum speed must it travel to cover a distance of 100km as measured by a stationary observer
If aliens were to drop an asteroid of a mass 10^14 kg from about the radius of the moon's orbit (384,000km), how much kinetic energy would it have
At a party,3.00kg of ice at-4.20°C is added to a cooler holding 30 liters of water at 20.0°C. What is the temperature of the water when it comes to equilibrium
A steel cable with total length 30 m and mass 100 kg is connected to two poles. find the wavelength of the resulting wave on the cable
Two violin strings are tuned to the same frequency, 294 Hz. The tension in one string is then decreased by 1.5 %. What will be the beat frequency heard when the two strings are played together.
light ray is incident normally to the long face (the hypotenuse) of a 45° -45° -90° prism surrounded by air, Calculate the minimum index of refraction of the prism
Two waves are traveling in the same direction along a stretched string. The waves are 45.0° out of phase. Each wave has an amplitude of 7.00 cm. Find the amplitude of the resultant wave
An aluminum cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. A 490 g sample of silver at an initial temperature of 90°C is placed in the water. Calculate the mass of the aluminum cup
question1a 44.0 kg child is in a swing that is attached to ropes 1.90 m long.the acceleration of gravity is 9.81
A glass flask whose volume is 1000cm^3 at a temperature of 0.400^ C is completely filled with mercury at the same temperature. When the flask and mercury are warmed together to a temperature of 52.0 C, a volume of 8.25cm^3 of mercury overflows the..
A husband buys a helium-filled anniversary balloon for his wife. The balloon has a volume of 4.1L in the warm store at 72deg F. By how much has the volume decreased
You have a 6kg cart that has a spring attached to the front. You hold the cart so the spring is compressed against the wall. What is the total work done by the spring on the cart
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