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In an experiment, olive oil (n=1.47) is added to a glass of water (n=1.33) slowly to form a thin film on top of the water. When the film appears to be dark under a red light (=685 nm) for the first time, no further addition of the oil is made. What color, measured in wavelength, will the film appear to be if the glass is directly under the sun light?
A 70-kg ski jumper starts from rest 59 m above the ground on an icy track and flies off the track at an angle of 31°, With what speed does the skier leave the track
A 20 Kg loudspeaker is suspended 2.0 m below the ceilling by two cables that are each 30' from vertical . What is the tension in the cables
A bullet is fired into a block of wood sitting on a block if ice. The bullet has an initail velocity of 500m/s and a mass of 0.005 kg. The wooden block has a mass of 2kg and is initially at rest.
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
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. A typical mantle contains 439 mg of thorium. What is the reactivity of the mantle
A car of mass 1500 kg traveling at 24 m/s is at the foot of a hill that rises 115 m in 2.2 km. Find the average power delivered by the car's engine
A uniformly charged ball of radius a and charge Q is at the center of a hollow metal shell with inner radius b and outer radius c. The hollow sphere has net charge +4Q. Decide the electric field strength in the region r? a. Determine the electric fie..
An airplane, diving at an angle of 48° with the vertical, releases a projectile at an altitude of 670 m. The projectile hits the ground 3.43 s after being released. What is the speed of the aircraft?
What is constant acceleration
Two masses connected by a rope are being pulled along a frictionless floor by a Force of 10 N. obtain the tension in the rope connecting the two masses
To develop muscle tone, a woman lifts a 4.00 kg mass held in her hand. She uses her biceps muscle to flex the lower arm through an angle of 60.0°. How much work does she do
A cube of ice is taken from the freezer at -9.4°C and placed in a 94 g aluminium calorimeter filled with 315 g of water at room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of ice cube.
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