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in a serios accident,a nuclear power plant's reactor vessel cracks,and all of the cooling water drains out.although nuclear fission stops, radioactive decay continues to heat the reacto's 2.5*10 to the 5 squared kg uranium core at a rate of 120 mega-watts.once the core reaches its melting point,how much energy will it take to melt the core? how long will the melting take?
A race car starting from rest accelerates at a constant rate of 6.50 m/s2. What is the velocity of the car
The Boeing 777 aircraft has a takeoff mass of 255000kg and a takeoff speed of 115m/s, What airflow speed across the top of the wing is necessary for the plane to fly
A worker on a scaffolding 65 ft above the ground needs to lift a 390 lb bucket of cement from the ground to a point 30 ft above the ground by pulling on the rope weighting 2 lb/ft . Set up the integral of how much work is required (just give the i..
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. What is the voltage between the plates
calculate the electric field on the axis of the disk at 5 cm, 10 cm, 50 cm, 200 cm from the center of the disk
a TeflonTM-filled parallel-plate capacitor having a plate area of 200 cm2 and insulation thickness of 0.0400 mm, find the maximum voltage that can be applied to this capacitor
An 8 g bullet is fired into a 2.5 kg ballistic pendulum and becomes embedded in it. If the pendulum raises a vertical distance of 6cm, compute the initial speed of the bullet.
0.20g of hydrogen gas are held in a rigid container. The temperature of the gas is changed from 50 K to 80 K. How much heat is needed.
A telescope can be used as a camera if the film is placed at the image position of the objective lens (or mirror); what is the angular separation of the two stars
An electron is inside a solenoid, 28 cm from the solenoid axis. At what rate is the solenoid's magnetic field changing
Your physics TA has a far point of 0.711 m from her eyes and is able to see distant objects in focus when wearing glasses with a refractive power of ?1.47 D. Determine the distance between her glasses and eyes
Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 9.0 N, acting due east, What is the magnitude of the body's acceleration
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