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A stuntman drives a car over the top of a hill, the cross section of which can be approximated by a circle of radius R = 250 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill?
A person with perfect pitch sits on a bus bench listening to the 450{\rm Hz} horn of an approaching car. how fast is the car moving
What is the lift (in newtons) because of Bernoulli's principle on a wing of area 78m^2 if the air passes over the top and bottom surfaces at speeds of 260m/s and 150 m/s, respectively.
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
A model airplane of mass 0.870 kg is flying at constant speed in a horizontal circle at one end of a 28.0 m cord and at a height of 17.0 m. What is the acceleration of the plane
Under such extreme conditions, protons and electrons are squeezed to form neutrons, giving birth to a neutron star. Neutron stars are massively heavy - a teaspoon of the substance of a neutron star would weigh
Find the force acting on the roof of a 7m x 7m airtight building due to the difference in air pressure created during a hurricane with 78 m/s winds. A large open tank contains liquid with a density of 1200 kg/m3 at a depth of 10 m. A 5 x 10-3 m2 p..
You push on the chair with a force of = 42.0 directed at an angle of 34.0 below the horizontal and the chair slides along the floorcalculate, Illustrate what is the magnitude of the normal force that the floor exerts on the chair.
A 5570kg open train car is rolling on frictionless rails at 23.6m/s when it starts pouring rain. What mass of water has collected in the car
A slab of material has parallel faces. One coincides with the xy-plane while the other is given by z=t. Find the volume and surface densities of bound charge
A microphone is moving in air towards a stationary source of sound. The detected frequency is 106 Hz greater than the emitted frequency. What is the speed of sound in the unkown liquid
a golfer tees off on the fourth hole on a level golf course, giving the ball an initial speed of 42.0 m/s and an initial direction of 35 degrees above the horizontal. How far from the golfer does the ball land
Find the typical speed for a tsunami. (Note down that in the open ocean, tsunamis generally have amplitude of less than a meter, allowing them to pass ships unnoticed. As they approach shore, however, water depth decreases and the waves slow down. Th..
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