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Q1. A skater holds her arms outstretched as she spins at 180 rpm. What is the speed of her hands if they are 150 cm apart?
Q2. Consider a horizontal square plate capacitor of area 1.8 x 1.8 m^2, capacitance in vacuum 2.5 μF, that contains the dielectric material with dielectric constant K=5. The dielectric slides frictionless and is attached via a massless string and a massless pulley to a block of mass 3 kg. The block pulls the dielectric from the capacitor as it falls. Calculate the speed of block at the instant the dielectric leaves the capacitor assuming it starts at rest and that the voltage across capacitor after the dielectric is removed is measured to be 200 V.
Neutrons (RBE = 3.4) and %u03B1 particles have the same biologically equivalent dose. What is the RBE for the %u03B1 particles
question1a child in danger of drowning in a river is being downstream by a current that has a speed of 2.25 kmh. the
The index of refraction of benzene is 1.8. What is the critical angle for a light ray traveling in benzene toward a flat layer of air above the benzene
An object with mass 3.2kg is executing simple harmonic motion, attached to a spring with spring constant 260N/m, Calculate the maximum speed attained by the object
A jeweler examines a diamond with a magnifying glass. find the angular magnification when the diamond is held 5.39cm from the magnifying glass
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal. How far over does it land on the ground?
To separate two pieces of paper whose area is 10 cm by 10 cm, you blow across them with an air speed of 2.40 m/s. What is the resulting force on each
A transverse wave is travelling in a denser medium is incident on a rarer medium. How the phase of the wave is affected
What must the charge (sign and magnitude) of the particle of mass 1.42 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 650 N/C.
When one person shouts at a football game, the sound intensity level at the center of the field is 60.0 dB. how many people are at the game
q1. a 60kg ball of clay is thrown horizontally at 40 ms toward a 1.6kg block sitting at rest on a frictionless hi
A 75 kg ladder that is 3.0 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.2 m from the base of the ladder. find the static frictional force between the floor and the ladder
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