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1. A cylindrical resistor of radius 4.9 mm and length 1.9 cm is made of material that has a resistivity of3.50×10-5 Ω m. What is the current density when the energy dissipation rate in the resistor is 1.0 W?
2. What is the potential dissimilarity?
A 2000 kg sailboat experiences an eastward force of 3000 N by the ocean tide and a wind force against its sails with magnitude of 6000 N directed toward the northwest ( 45 degress N of W.) what is the direction of the resultant acceleration?
Two blocks are connected by a string. The smooth inclined surface makes an angle of 39o with the horizontal, Obtain the direction and magnitude of the hanging block acceleration
A car moving at 8 m/s crashes into a barrier and stops in 0.050 s. There is a 17-kg child in the car. What is the impulse needed to stop the child
What horizontal force P must a worker exert on the rope to position 50 kg. crate directed over the trailer.
A ray of light is incident at angle 60 degrees on the upper surface of a transparent plate of thickness h=1cm, What is that lateral displacement d of the outgoing ray with respect to the incident ray
On a frictionless, horizontal air table, puck A (with mass 0.150 kg ) is moving toward puck B (with mass 0.400 kg ), What was the speed of puck A before the collision
While in orbit about the Earth, a space shuttle's mass is 50,000 kilogram and its speed is 8 km/s. Evaluate what is its kinetic energy
The outer edge of the grooved area of a long-playing record is at a radial distance 35 cm from the center; What is the radial speed of the needle
A glass sheet 1.10 ?m thick is suspended in air. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect
Fossilized ichthyosaurusremains enable us to estimate their volume. What was its weight in metric tonnes
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 80 kg. A person pushes on the outer edge of one section with a force of F = 75 N that is directed perpendicular to the section. Find out ..
A grandfather's clock is calibrated at a temperature of 20 C. The pendulum is a thin brass rod with a heavy mass attached to the end. On a hot day, when the temperature is 30 C, does the clock run fast or slow? How much time does it gain or lose i..
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