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A spherical pot of hot coffee contains 0.75 of liquid (essentially water) at an initial temperature of 99. The pot has an emissivity of 0.60, and the surroundings are at a temperature of 20.0. Calculate the coffee's rate of heat loss by radiation.
A right circular cylinder has radius of 1cm and contains Hg ( d= 13.596 kg/l), Determine length of mercury column and length of water column
A 7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car
A satellite in geosynchronous orbit orbits the earth in 24 hours. find the radial velocity and the angular velocity
question1two blocks are associated by a light string that passes over a frictionless pulley. the block of mass m1 lies
A 22-turn circular coil of radius 4.20 cm and resistance 1.00 O is placed in a magnetic field directed perpendicular to the plane of the coil. Calculate the induced emf in the coil at t = 5.20 s
Compute the momentum of the bullet
Rubber stopper attached to one end of the string and 100 g mass attached to the other end. A student gets the rubber stopper going in a horizontal circle above her head.
A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.05 x 10^4 rad/s to 3.14 x 10^4 rad/s. In the process, What is the frequency of red light with a wavelength in vacuum of 600 nm
4.3 moles of Hydrogen gas initially at Standard Temperature and Pressure. The gas is heated to a temperature of 49°C while being kept at constant pressure. What is the new volume of the gas after it is heated
One argument against Darwin's theory of evolution draws upon the second law of thermodynamics. Does this mean that organisms violate the Second Law of Thermodynamics
q1. an electron librated from a hot filament cathode is attracted by an anode with a potential of 1200v positive with
A ball is kicked from the ground toward a fence that is located 25 m away. By how much does the ball clear the fence
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