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A child complains that her milk is too hot. It is indeed too hot at 90o C. Her mother pours 80 g of cold milk at 7oC to the 160 g milk already in the cup. If the specific heart capacity of milk is 3800 J.kg-1.K-1, what is the temperature of the mixture now?
find the work done on the man by the gravitational force
find the time rocket reaches the peak height of trajectory.
Find the change in momentum of a 1080 {rm kg} car that increases its speed from 5.0 {rm m/s} to 14.5 {rm m/s} in a time of 11 {rm s} while travelling in the same direction.
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
A conductor is suspended by two flexible wires has a mass per unit length of 0.04 kg/m. What is the required direction for the current
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
A nonconducting spherical shell of inner radius R1 and outer radius R2 has a uniform volume charge density ?. find the total charge on the shell
In compressing the spring in a toy dart gun, 0.6 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.08 kg. What is the dart's speed
In a popular amusement park ride, a rotating cylinder of radius 4.00 m is set in rotation at an angular velocity of 6.00 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position.
Water undergoes viscous flow through two pipes with the same pressure difference between the ends. what is the flow rate through pipe 2
Assume the distance between the protons in the H2 molecule is 7.50 multiply.gif 10-11 m. Find the energy of the second rotational state, with J = 2
A solenoid is 8.93 cm long, 1.56 cm in diameter, and has 310 turns. find the magnetic flux through one turn of the solenoid
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