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Two point charges lie along the y-axis. A charge of q1 = -9.5 ?C is at y = 6.0 m, and a charge of q2 = -7 ?C is at y = -4.0 m. Locate the point (other than infinity) at which the total electric field is zero.
A small immersion heater is rated at 350 W. Estimate how long it would take a heat a cup of soup (assume this is 250 mL of water) from 20C to 60C.
When the afternoon Sun reaches an angle of 30° above the horizon, sunlight ceases to clarify any part of the bottom of the tank. How deep is the tank.
A 70-? electrical appliance and a 110-? electrical appliance are plugged into the outlets of a house. By what factor will the power used change if an additional 140-? electrical device is plugged in?
Neglect air resistance during the descent. She comes to rest 3.00 m under the surface of the water. Identify the average force that the water exerts on the diver. This force is nonconservative.
Distance between focal plane and lens
assume a bar 2.5 m long expands 0.5 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated.
Assume that your reaction time is 0.50 s and that your car brakes with constant acceleration. How far are you from the intersection when you begin to apply the brakes? Illustrate what acceleration will bring you to rest right at the intersection?
A uniform soda can of mass 0.140 kg is 12.00 cm tall and filled with 1.31 kg of soda. After that small holes are drilled in the top and bottom (with negligible loss of metal) to drain the soda.
If an automobile rounds this curve at 30 {rm m/s}, illustrate what is the minimum coefficient of static friction between tires and road needed to prevent skidding?
An 77 kg quarterback jumps straight up in the air right before throwing a 0.43 kg football horizontally at 15 m/s. Illustrate how fast will he be moving backward just after releasing the ball?
A car starts from rest and travels for 10s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform negative acceleration of -2.0 m/s2.
Illustrate what are the possible weaknesses in the Kimberely Process? Illustrate what role do you think the three sectors will have in addressing these weaknesses?
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