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In a house the temperature at the surface of a window is 23°C. The temperature outside at the window surface is 6°C. Heat is lost during the window via conduction, and the heat lost per second has a certain value. The temperature outside begins to fall, while the conditions inside the house remain the same. As a result the heat lost per second increases. What is the temperature at the outside window surface when the heat lost per second doubles?
A charge of -3.00 nC is placed at the origin of an x-y coordinate system, and a charge of 2.00 nC is placed on the y-axis at y=4.00cm. What are the magnitude and direction of the total force
Two carts with masses of 4.80 kg and 2.78 kg move toward each other on a frictionless track with speeds of 4.94m/s and 3.17m/s respectively. The carts stick together after colliding head-on. Find out the final speed.
A mass of 0.450 kg rotates at constant speed with a period of 1.45 s at a radius of R 0.140 m . What is the rotation period for a mass of 0.550kg at the same radius
A 4200 kg truck is parked on a 24° slope. How big is the friction force on the truck
A body of mass M is initially at rest, Find the expression for the instantaneous power delivered to the body as a function of time
A 3700-lb automobile (m = 1600 kg) starts from rest on a level road and gains a speed of 45 mi/h (= 72 km/h) in 33 s. What is the average net power delivered to the car during the 33-s interval
question a cyclotron for accelerating protons has a magnetic field of 1.4 t and a radius of 0.7 m.a what is the
A 35.0 kg person crawls across a 15.0 m long horizontal beam that has a mass of 15.0 kg. The beam has a support line that is at an angle of 65 degrees up from the horizontal.
a certain quantity of steam has a temperature of 109.1 degc. to convert this steam into ice at 0.0 degc energy in the
A chemist must dilute of M aqueous silver nitrate solution until the concentration falls to M . He'll do this by adding distilled water to the solution until it reaches a certain final volume
1. the sun radiates energy at a rate of 2.86x1023 kw. each fusion reaction in the core of the sun produces 26.73 mev of
A satellite of mass 190 kg is placed into Earth orbit at a height of 600 km above the surface. how long does the satellite take to complete one orbit
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