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A cylindrical resistor of radius 4.8 mm and length 2.0cm is made of material that has a resistivity of3.50×10-5 Ω m.
a) What is the current density when the energy dissipation rate inthe resistor is 1.0 W?
b) What is the potential difference?
a vehicle covers 600m on a compass bearing of 47 degrees,then 500m bearing 128 degrees; Determine the resultant displacement of the vehicle
An object of mass 3.00 kg, moving with an initial velocity of 5.00i m/s, collides with and sticks to an object of mass 2.00 kg with an initial velocity of ?3.00j m/s
a uniform 5.93 m long horizontal beam that weighs 468N is attachedto a wall by a pin connection that allows the beam to rotate. itsfar end is supported by a cable that makes an angle of 51 degreeswith the horizontal, and a 582N person is standing 1.2..
A thin, uniform, metal bar, 3m long and weighing 85 N, is hanging vertically from the ceiling by a frictionless pivot. Find the angular speed of the bar just after the collision
A 31-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, How high does she rise during this interval
Steam enters a turbine in a Rankine cycle power plant at 200 psia and 500 degrees F. Calculate the isentropic thermal efficiency if the condenser pressure is 14.7 psia
A 0.300 kg hammer is moving horizontally at 8.00 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. What was the average force exerted on the nail
A spherical balloon of volume 3.94 103 cm3 contains helium at a pressure of 1.15 105 Pa. How many moles of helium are in the balloon
A 45.0-kg girl is standing on a 144-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
Zach, whose mass is 83kg , is in an elevator descending at 10m/s . The elevator takes 3.4s to brake to a stop at the first floor. What is Zach's weight before the elevator starts braking
From the top of a mountain a hiker looks at the next mountain top in the distance and notes the compass direction of the peak. how far has the hiker walked
Consider a simple cubic crystal structure with a cube edge a= 3.5x10^-10 m and suppose it is used to scatter 3.10x^-10 m x-rays, Find the Bragg angle theta
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