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The heat of fusion for gold at 1,063°C is 66.6 kJ/kg and the specific heat of gold is 0.128 kJ/kg °C. What is the energy needed to melt 100 grams of gold starting at 0°C?
Find out an average acceleration of the motorcycle
A charge of -4 nC is at the origin and a second charge of 14 nC is at x = 3.00 m. Find out the magnitude and direction of the electric field halfway in between two charges.
1. Explain why it is dangerous for a bus to carry standing passengers. 2. Sea water of density 1.04g/cm3 is being pumped into a tank through a pipe of uniform. cross-sectional area of 3.142cm2. If the speed of water in the pipe is 5m/s, determine the..
A fairground ride called "The Wall of Death" consists of a cylindrical container of internal diameter 6.50m, mounted on a cylindrical axis. Calculate the coefficient of static friction between the wall and the passengers' backs
A rocket is launched at an angle of 58.0° above thehorizontal with an initial speed of 97m/s. The rocket moves for 3.00 s along its initial line of motionwith an acceleration of 32.0m/s2. At this time, its engines fail and the rocketproceeds to mo..
Fission was once referred to as "splitting the atom." Is this correct? During operation, breeder reactors make fissionable fuel from no fissionable material. What is the fuel made, and what is the no fissionable material used?
A microwave oven is powered by a magnetron, an electronic device that generates electromagnetic waves of frequency 2.45 GHz. calculate the speed of the microwaves
The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. There fore, atransformer is plugged into the wall socket and produces the necessary voltage for charging the batteries.
the heating coil of a hot-water heater has a resistance of 20 and operates at 210 v. if electrical energy costs
A loop of wire of area 2 m2 is placed with its plane perpendicular to a magnetic field of 3 T. what is the induced emf
A spring stretches 5.0cm when a 0.20kg block is hung from it. If a 0.60kg block replaces the 0.20kg block, how far does the spring stretch?
a 100 kg car travelling at 20 ms collides with a 100 kg car traveling at 8 ms in opposite direction a if the two cars
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