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A 4-m X 5-m X 6-m room is to be heated by one ton (1000 kg) of liquid water contained in a tank that is placed in the room. The room is losing heat to the outside at an average rate of 8000 kJ/h. The room is initially at 20°C and 100 kPa and is maintained at an average temperature of 20°C at all times. If the hot water is to meet the heating requirements of this room for a 24-h period, determine the minimum temperature of the water when it is first brought into the room. Assume constant specific heats for both air and water at room temperature.
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
The same boat now heads directly across the river. What is the velocity of the boat relative to the shore? If the river is 110 meters wide, How long does it take for it to cross
Plutonium decays radioactively by emitting an alpha particle from its nucleus, If the alpha particle comes from the surface of the Plutonium nucleus, what is its greatest acceleration
A uniformly charged rod of length L and total charge Q lies along the x axis. Find the components of the electric field at point P on the y axis a distance d from the origin
One mole of an ideal diatomic gas is heated from a temperature of 19 degrees C to a temperature of 149 degrees C. How much heat in joules must be supplied if the volume is kept constant during heating?
Charges q1=+6.75 × 10-5 C and q2=-5.45 × 10-4 C are placed at rest 89.5 cm apart. How much work must be done by an outside agent to move these charges slowly
Initially 0.900 mol of an ideal gas in a container occupies a volume of 3.40 l at a pressure of 3.80 atm with an internal energy U1 = 410.4 J. Find the heat added during this process
if the kinetic energy of a neutron confined inside a cubic box is 10 mev in its ground state calculate the size of the
In a hot star, as of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Compute the wavelengths of the next three spectral lines nearest to the line of longest wavelength
A uniform bridge 20.0 m long and weighing 4.00 x 10^5 N is supported by two pillars located 3.00 m from each end. If a 1.96 x10^4 N car is parked 8.00 m from one end of the bridge, how much force does each pillar exert?
Mars has a mass of 6.42 1023 kg and a radius of 3.40 106 m. Assume it is a uniform solid sphere. The distance of Mars from the Sun is 2.28 1011 m. What is the rotational kinetic energy of Mars on its axis
A dipole consist Of two charges Of opposite sign And each charge has a magnitude 7.20E-18C. compute the magnitude of the torque(in newton-meters) on the dipole
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