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A converging lens with a focal length of 20 centimeter is used to produce an image on a screen that is 2 meter from the lens. Evaluate what is the object distance?
a person pushes on a 57-kg refrigerator with a horizontal force of -270 n the minus sign indicates that the force
A 1408.0 g mass is on a horizontal surface with ?k = 0.39, and is in contact with a massless spring with a force constant of 526.0 N/m which is compressed. Calculate the distance the spring was compressed
Pilots can be tested for the stress of flying high-speed jets in a whirling "human centrifuge" which takes 1.0 min to turn through 20 complete revolutions before reaching its final speed. what was its final speed in rpm
5.0kg of copper has an apparent weight of 40N when inserted into an unknown fluid. Find the density of the unknown fluid
a potential difference is applied between the electrodes in a gas discharge tube. in 2.0 s 3.1 x 1016 electrons and 1.1
Find the change in length of the bridge for an increase in temperature of 10 degree Celcius
A square coil of wire of side 3.00 cm is placed in a uniform magnetic field of magnitude 2.50 T directed into the page, find the average current induced in the coil during this rotation
A Porsche 944 Turbo has a rated engine power of 217 . 30% of the power is lost in the drive train, and 70% reaches the wheels. what is its speed when it reaches maximum power output
A damped mass-spring system oscillates at 140 Hz. The time steady of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.6 cm and the energy of the oscillating system is after that 86 J.
A 10-m-long glider with a mass of 680kg (including the passengers) is gliding horizontally through the air at 26m/s, What is the glider's speed just after the skydiver lets go
Suppose your favorite FM radio station broadcasts at a frequency of 99.9 MHz. What is the wavelenght of this signal
the equation of continuity states the mass flow rate has the same value at every position along a tube that has a
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