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An automobile moves at a constant speed over the crest of a hill. the driver moves in a vertical circle of radius 17.5m. at the top of the hill, she notices that she barely remains in contact with the seat. find the speed of the vehicle.
A transverse wave is travelling in a denser medium is incident on a rarer medium. How the phase of the wave is affected
Mary needs to row her boat across a 120{\rm m} -wide river that is flowing to the east at a speed of 1.5{\rm m/s}. how far downstream will she land
A spherical mirror is to be used to form an image 5.20 times the size of an object on a screen located 4.20 m from the object, What is the required radius of curvature of the mirror
a boy hears an eco of his own voice from a distant hill after 1s. The speed of the sound is 340m/s. What is the distance of the hill from the boy
A 9 m, 260-N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.5, and the ladder makes a 50° angle with the ground. How far up the ladder can an 800-N person climb before the ladd..
A stereo speaker has a surface area of 0.043 m^2. The acoustic power output of the speaker is 1.7 W. Calculate the intensity of the speaker
A double-slit experiment is set up using a helium- neon laser (lamda=633nm). How thick is the glass
What happens when a proton moves parallel to a magnetic field and when a proton moves perpendicular to a magnetic field
A 66.0 kg person throws a 0.0410kg snowball forward with a ground speed of 25.0 m/s. A second person, with a mass of 57kg, catches the snowball.
Suppose a portable electric heater can be modeled by an Ohmic resistor. If the heater requires 600 Watts to operate, calculate the voltage drop across the heater
Estimate the speed of the water just before striking the turbine blades (overlook air resistance).
The pressure in each of your car tires is 1.90 105 Pa. The mass of your car is 1500 kg. what is the contact area of each tire with the road
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