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You want to lift a heavy box with a mass of 98 kg using a two pulley system.
a) With what minimum force do you have to pull down on the rope in order to lift the box slowly at a constant velocity?
b) If you lift the box by 1 m, how much work is done by gravity?
c) how much work is done by you?
A 1.0-cm-diameter microscope objective has a focal length of 2.8 mm . It is used in visible light with a wavelength of 550 nm. What is the objective's resolving power if used in air
A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz. The height of the oven cavity is 25 cm, What is the amplitude of the electric field
Two resistors are connected in a series to a 15V battery. The voltage drop across the first resistor is 3.5V, What is the resistance of the two resitors
A convex mirror has a focal length of -20 cm. What is the position of the resulting image in cm if the image is upright and one-fourth the object size
Your thoughts about illustrate what information is critical to collect at the outset of or early on in the interview process. Explain the upsides and downsides/concerns of having to gather this information and address related issues in a first se..
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg and the same charge. The two particles are initially held in place and then released.
Two particles with masses 2m and 5m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the two particles in terms of vi. particle 2m
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons with charge q = +2(1.6 x 10-19 C ) is moving perpendicular to a magnetic field of 0.530 tesla at a velocity of 3.00E+6 m/s, Calculate the acceleration of the alpha p..
Determine the magnitude and direction of the force between two parallel wires 15m long and 6.0cm, Determine the magnitude of the force between two parallel wires
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 2.85 multiplied by 10-4 m3, What mass of gold is contained in the rock
A 57 kg tightrope walker stands in the middle of a rope. Her weight makes the rope sag, evaluate the rope tension
Electric charge can accumulate on an airplane in flight. You may have observed needle-shaped metal extensions on the wing tips and tail of an airplane, What is the electric field at the surface of each sphere
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