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A college student is working on her physics homework in her dorm room. Her room contains a total of gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 . If her dorm room were an isolated system (dorm rooms can certainly feel like that) and if all of this thermal energy were transferred to the air in the room, by how much would the temperature increase in 14 ?
A 225-m length of wire stretches between two towers and carries a 180-A current. Determine the magnitude of the force on the wire due to the Earth's magnetic field
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 205 N/m. Find the spring constant of spring 2.
What is the equilibrium temperature of this system? The average specific heat of aluminum over this temperature range is 653 J/(kg*K), determine the amount of water that has frozen
m1 = 26.00 kg, m2 = 13.10 kg, R = 0.12 m, and the mass of the uniform pulley M = 5.00 kg. Calculate the time interval required for m1 to hit the floor
A capacitor is connected across the terminals of an ac generator that has a frenquency of 460 Hz and supplies a voltage of 24 V. When a second capacitor is connected in parallel with the first one, the current from the generator increases by 0.18 A. ..
Throughout a hard sneeze, your eyes may shut for 0.41 s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.
The circle inside the large square below has an area of 71.4 cm2. Calculate the area of the large square
An aircraft door closes by pushing it inside the airplane first. We will assume P = 0 outside the aircraft, and P=0.9 atm inside during flight. what is the total force required to open the door while in flight
The car now stops, and the four people get out. By how much does the car body rise on its suspension owing to this reduce in weight.
A 6 cm diameter conducting loop with resistance of 10m\Omega is placed perpindicular to a variable magnetic field B. Determine the current and its direction induced in the loop
A 4.77-kg ball of clay is thrown downward from a height of 3.31 m with a speed of 4.81 m/s onto a spring with k = 1690 N/m. Find the maximum compression of the spring
A partly full paint can has 0.42 U.S. gallons of paint left in it. how thick is the layer of wet paint
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