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A Carnot refrigerator is operated between two heat reservoirs at temperatures of 320 K and 265 K.
The reading on the scale when the block is completely immersed in water is 25.8 N, and the reading when it is completely immersed in a liquid of density 869 kg/m3 is 26.7 N. (a) What is the block's
A large aquarium of height 5.98 m is filled with fresh water to a depth of D = 2.40 m. One wall of the aquarium consists of thick plastic with horizontal length W = 7.10 m. By how much does the tota
An electron and a 0.0500-kg bullet each have a velocity of magnitude 450m/s, accurate to within 0.0100%. Within what lower limit could we determine the position of each object along the direction of
Two bumper cars of equal mass (m=700 kg) collide head-onelastically. Car 1 was moving to the right at 1.5 m/s before the collision. After the collision, car 1 was moving to the left at 2 m/s. Find t
A ray of light in air strikes a glass plate (n = 1.50) at an incidence angle of 500. Determine the angles of the reflected and transmitted rays.
A container of cross-sectional area 117 cm2 contains liquid of density 2.4 g/cm3 to a height of 5.10 cm above a small hole of area 1.00 cm2 in the side. Find the flow rate?
A particle with a charge of 4C and a mass of 12kg is travelling in a circular path around a fixed particle of charge -3C. The velocity is observed to be 3x10^3 meters per second. What is the radius
Two vehicles approach a right angle intersection and then collide. After the collision, they become entangled. If their mass ratios were 1:3 and their respective speeds as they approached were both
A 1200 kg cannon fires a 100.0 kg cannonball at 97 m/s. What is the recoil velocity of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally.
A 0.646 m string is clamped at both ends. If the lowest standing wave frequency in the string is 326 Hz, what is the wave speed?
Having found the minimum kinetic energy of an alpha particle inside a nucleus to be roughly 2.0 Mev, and given that the typical kinetic energy of an emitted alpha particle is 5.0 MeV, is actually po
If a pilot lets go of a rescue package and it lands on the island, how fast was the plane traveling? what was the final velocity of the package right before it hit the ground?
A handball of mass 0.15 Kg, traveling horizontally at 25m/s, strikes a wall and rebounds at 19m/s (a) What is its linear momentum BEFORE the impact?
What fraction of the nuclei in a tritium sample will remain after 3.50 yr?
Question: A 10-cm-long thin glass rod is uniformly charged to 50 nC. A small plastic bead, charged to - 5.4nC , is 4.5 cm from the center of the rod. What is the magnitude of the force on the bead?
What is the field strength a point on the axis 5 cm from one disk between them? (N/C)
Question: A mirror produces a 10 cm high image of an object that is only 4cm high. if the image is also real and inverted, then magnification of the mirror is.
A microwave oven operates at 2.4 GHz with an intensity inside the oven of 2500 W/m^2. What is the amplitude of the oscillating electric field?
The intensity of electromagnetic radiation from the sun reaching the earth's upper atmosphere is 1.37 kW/m^2
What is the minimum amount of electrical energy required by the refrigerator to carry out this process if it operates between reservoirs at temperatures of 20.0 °C and -20.0 °C?
A man and a boy are carrying a uniform wooden beam that is 8 m long and weighs 900 N. The boy lifts at one end. At which distance from the boy does the man have to hold the beam so that he lifts twi
A speck of clay of mass m = 0.01 kg strikes and stick to a wooden block of mass M = 0.99 kg, which rests on a frictionless horizontal surface and is attached to a spring with spring constant k = 10
The classical picture of the hydrogen atom has a single electron in orbit a distance 0.0529nm from the proton. Calculate the electric potential associated with the proton's electric field at this di
A new material is found to be superconducting below 104 K. How much resistance will a 100 mm long sample of this material have if it is at a temperature of 93.6 K while connected to a 8.3 V AC-power s