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An elevator is traveling upward at constant speed of 2.4 m/s. At time t = 0 s an object is dropped down the elevator shaft. After 2.4 s has passed, the distance between the object and the elevator is m.
A straight horizontal pipe with a diameter of 1.0 cm and a length of 47 m carries oil with a coefficient of viscosity of 0.13 N · s/m2. Estimate the maximum flow speed if the flow must be streamline
Consider an angular motion. If the displacement is given as 250teθ, and the radius r is constant, derive the expressions for the angular velocity θ=ω, angular accelerationα, linear displacements, linear velocitytv, normal accelerationna, and tange..
An automobile radiator is filled to the brim with 45 liters of glycerin coolant at 10 degrees C. How much glycerin overflows from the radiator as a result of expansion
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. What is the size of the image of the tree on your retina
A skier of mass m= 70kg glides down a slope at angle theta= 32 degrees, as shown in the figure below. The snow is so slippery that you can neglect friction. Find the force the snow exerts on the skier
At the end of a wild roller-coaster ride, the train of cars must come to a graceful stop at the loading station. What is the magnitude of the acceleration of the train
A 20 cm long organ pipe is filled with air and is open at one end and closed at the other. The velocity of sound in air at 0°C is 331 m/s. What is the wavelength of the fundamental frequency
Carlos is pitching in the nal game of the season. The pitcher's mound is 18.4 meters from home plate, With what speed does the ball cross the plate
A soccer ball is kicked with an initial horizontal velocity of 12.0 m/s and an initial vertical velocity of 19.0 m/s, How far from where it was kicked will the ball land
A conducting bar rests on two parallel horizontal rails 50 cm apart forming a square area. The resistance of the bar and the rails is assumed to be constant and equal to 0.05 ??. What is the maximum value of the force acting on the bar during that ..
A 12373-kg ice skater is standing at rest on a frozen lake. The friction between his skates and the surface of the ice is negligible. what is the magnitude of his recoil velocity
In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Find the net power radiated by the person when in a room with temperature . Express the net radiated power numerically, to the nearest 10 W
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