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A skier is gliding along at 4.72 m/s on horizontal, frictionless snow. He suddenly starts down a 19.2° incline. His speed at the bottom is 27.8 m/s. What is the length of the incline?
A spherical surface completely surrounds a collection of charges. Find the electric flux (with its sign) through the surface if the collection consists of (a) a single +1.90 × 10-6 C charge, (b) a single -2.40 × 10-6 C charge, and (c) both of the ..
The same device can act as both an air conditioner and a heat pump (after all, they do the same thing), what is the coefficient of performance of the device acting as a heat pump
A heat pump with a cop of 1.8 supplies energy to a house at a rate of 75000 kJ/h. Determine the electric power drawn by the heat pump and the rate of heat removal from the outside air
The circuit shown in the drawing is constructed with six identical resistors and an ideal battery. When the resistor R4 is removed from the circuit, Determine the resistance of each resistor
n lab tests on a 9.25cm cube of a certain material, a force of 1375N directed at 8.50degree to the cube, What is the shear modulus of the material
a physical pendulum consists of a uniform solid disk (of radius R = 54.9 cm) supported in a vertical plane by a pivot located a distance d = 21.1 cm from the center of the disk. What is the period of the resulting simple harmonic motion
A 74.8 g sample of copper at 143.2°C is added to an insulated vessel containing 165 mL of glycerol, C3H8O3 (l) (d = 1.26 g/mL), at 24.8°C. The final temperature is 31.1°C. The specific heat of copper is 0.385 J g-1°C-1
As a baseball is being caught, its speed goes from 43 to 0 m/s in about 0.003 s. What is the baseball's acceleration in m/s2
A loudspeaker of mass 21.0 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.90 {rm m}.
A laboratory technician drops an 83.5g solid sample of unknown material at a temperature of 100?C into a calorimeter. Compute the specific heat capacity of the sample
The rope wrapped around the outer diameter of the disk is pulled at a constant speed of 1.55 m/s. how fast does the hanging mass rise
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.20 kg wrench from 3.00 mm above the ground, Express the planet's mass in terms of the earth's mass
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