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A converging mirror has a focal length of 20 cm. An object is placed 30cm in front of the mirror. Showing your calculations, determine where the image appears.
A cart for hauling ore out of a gold mine has a mass of 427 kg, including its load. Find the work that the donkey performs on the cart during this process
A lighter-than-air spherical balloon and its load of passengers and ballast are floating stationary above the earth. determine how much weight must be dropped overboard to make the balloon rise 122m in 23 s
When the bulb of a constant-volume gas thermometer is placed in a beaker of boiling water at 100 oC, the pressure of the gas is 229 mmHg . When the bulb is moved to an ice-salt mixture, the pressure of the gas drops to 161 mmHg . Assuming ideal beh..
If in addition to the magnetic field a constant electric field is now created within the region where the magnetic field is located so that the charge proceeds in a straight line and exits with velocity v2 = v, what must be the magnitude of this e..
A physics book slides off a horizontal tabletop with a speed of 1.10 meter per second. Obtain the height of the tabletop above the floor
A ball is dropped from rest from the top of a building and hits the ground with a speed of v. From ground level a second ball isthrown upwards with the same speed at the same instant the ball at the top is dropped.
A plane goes from a velocity of 28 m/s to -45 m/s in 12 seconds. What is its average acceleration
A wire is 1.50 m long and has a diameter of 1.50 mm. The tensile modulus of the wire is 6.20 x 1010 N/m2. what is the increase in length of the wire
Assuming the losses in the nozzle of the form 0.04 V2/(2g), perfect velocity conditions between the water jet and the runner velocity, the water spreads at β° from the runner blades and neglecting the losses on the runner blades, determine:
Calculate the efficiency of a Rankine cycle that is modified from the parameters used in the text in each of the following three ways (one at a time), and comment briefly on the results: (a) reduce the maximum temperature to 500°C; (b) reduce the ..
The rope of a swing is 3.2 meter long. Find the angle from the vertical at which a 77 kilogram man must begin to swing in order to have the same kinetic energy at the bottom as a1460 kilogram car moving at 1.55 m/s
A square loop with resistance 15 ohms is located perpendicular to a time -varying magnetic field; the loop is 8.2 centimeter on a side. Determine the current circulating in the loop
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