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A 0.030 kg lead bullet hits a steel plate, both initially at 20?C. The bullet melts and splatters on impact. Assume that 80% of the bullet’s kinetic energy goes into increasing its temperature and then melting it.
a) How much heat is required to increase the temperature of the lead bullet and melt it?b) What is the minimum speed the lead bullet must have in order to melt on impact?c) What happens to the remaining 20% of the bullet’s kinetic energy?
A charge +q is located at the origin, while an identical charge is located on the x axis at x = +0.53 m. Where should the third charge be located
A 2.30 cm diameter tungsten sphere is heated to a temperature of 2000 degree C. At this temperature tungsten radiates only 30% of the energy radiated by a blackbody of the same size and temperature.
the earth has an angular speed of 7.272middot10-5 rads in its rotation.find the new angular speed if an asteroid m
A person notices a mild electric shock if the current along a path through the thumb and the index finger exceeds 80.0, Calculate the maximum allowable voltage with a wet-skin resistance of 1920
A piece of Nichrome wire has a radius of 5.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.50×102 W of power when connected to a voltage source of 100 V. Ignoring the effect of temperature on resistance, estimate the necessa..
A 5.0 kg wooden block is placed on an adjustable wooden inclinedplane. (hint: For wood onwood, μs is approximately .58and μk is approximately .40 .) What is the angle of incline above which the block will startto slide down the plane?
An electron in the hydrogen atom makes a drop from n = 3 to m = 2. What wavelength of photon is emitted
A cardinal (Richmondena cardinalis) of mass 4×10-2 kg and a baseball of mass 0.143 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum.
question1at one instant a bicyclist is 40.0 m due east of a parks flagpole going due south with a speed of 10.0 ms.
Suppose the river is flowing east at 3 m/s and the boat is traveling south at 4 m/s with respect to the river, Find the speed and direction of the boat relative to Earth
At the instant the traffic light turns green, a car that has been waiting at an intersection starts ahead with a constant acceleration of 3.00. How far beyond its starting point does the car overtake the truck
An object 0.520cm tall is placed 17.0cm to the left of the vertex of a CONVEX spherical mirror having a radius of curvature of 24.0cm. Calculate the size of the image
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