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Q1. A 35.0-kg child swings in a swing supported by two chains, each 2.90 m long. The tension in each chain at the lowest point is 352 N. Find the child's speeds at the lowest point.
Q2. The resistor in an RC circuit has a resistance of 150 Omega.
(a)What capacitance must be used in this circuit if the time constant is to be 3.7 ms?
(b)Using the capacitance determined in part (a), calculate the current in the circuit 7.4 ms after the switch is closed. Suppose that the capacitor is uncharged initially and that the emf of the battery is 9.0 V
Two parallel plates 0.600cm apart are equally and oppositely charged. An electron is released from rest at the surface of the negative plate and simultaneously a proton is released from rest at the surface of the positive plate. How far from the n..
q1. sunlight enters a room at an angle of 32 above the horizontal and reflects from a small mirror lying flat on the
A starship is exploring a new star system. The ship is a light-minutes away from the star, which has a radius of 106km. The intensity at the location of the starship is 240 W/m^2.
Jumping up before the elevator hits. After the cable snaps and the safety system fails, an elevator cab free-falls from a height of 33.0 m. determine the magnitudes of the impulse
A microscope has an objective lens with a focal length of 14.0mm . A small object is placed 0.90mm beyond the focal point of the objective lens. At what distance from the objective lens does a real image of the object form
An airplane needs to reach a velocity of 407 km/h to take off. On a 2000m runway, what is the least acceleration necessary for the plane to take flight.
You're convinced the opera is almost over because of the large women singing a loud vibrato, What is the power coming from her voice? All of the sudden 4 more identically loud women come out of nowhere
A 3.4M? resistor is connected in series with an initially uncharged 0.29?F capacitor. This arrangement is then connected across four 1.5-Vbatteries, What is the maximum charge on the capacitor
Charges q and Q are placed on the x axis at x = 0 and x = 2.0 m, respectively. If q = -40 pC and Q = +30 pC, define the net flux through a spherical surface (radius = 1.0 m) centered on the origin.
The work done by an engine equals one-half the energy it expels to a cooler at 0C. what is the temperature of the heater
A 37-kg block of ice at 0° C is sliding on a horizontal surface. The initial speed of the ice is 6.2 m/s, Determine the mass of ice that melts into wate
The filament of a light bulb has a temperature of 2.97 x 103 °C and radiates 60.0 W of power. Find the surface area of the filament
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