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Two resistances, one 62? and the other 88?,are connected in parallel. The resistors are then connected to a 12-V battery.
a. What is the equivalent resistance of the parallel combination?
b. What is the current through each resistor?
The speed of the fastest-pitched baseball was 45.0 m/s , and the ball's mass was 145g. How many joules of kinetic energy did this ball have
A baseball on a planet, where the acceleration due to gravity is 0.379 of a g and air resistance is negligible, is hit directly upward and returns to the same level 7.30s later. How fast was it moving just after being hit
A second oil is then poured into the right arm until the two levels are even. A small object (density 0.640 g/cm3 ) is dropped into the second column of oil and it is found to float with 20.0% of its volume above the surface.
A single chain supports a pulley whose weight is 40 N. Two identical 80-N weights are then connected with a cord that passes over the pulley
If the football has a mass of 0.47kg and the time of contact with the ball is 0.021s, what is the force exerted by the ball on the kicker's foot.
On the bunny hill at a ski resort, a towrope pulls the skiers up the hill with constant speed of 1.57 m/s. What is the force with which the towrope has to pull on the child before movement, right as the child grabs the towrope
A small 2 g bullet moving at V0= 2000 m/s, inbeds itself in a 1kg block at the top of an inclined plane with an angle of θ= 450. The combined system then becomes a projectile, landing on the ground 10 m below the top of the incline. Calculate the f..
A house has a floor area of 200 m2 and an outsidewall that has an area of 50.0 m2. The earth's magneticfield here has a horizontal component of 2.65E-5 T that points duenorth and a vertical component of 4.22E-5 T that points straightdown, toward t..
a uniform electric field has magnitude e and is directed in the negative x-direction. the potential difference between
a constant force changes the speed of a 76 kg sprinter from3m/s to 4m/s be 0.45s. What is the magnitude (in m/s2)of the acceleration of the sprinter
How much is the spring compressed?
AM radio signals are broadcast at frequencies between 530 kHz and1605 kHz (kilohertz) and travel 3.0 108 m/s. What is the range of wavelengths for these signals.
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