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Suppose that the concentration of infrared-absorbing gases in earth's atmosphere were to double, effectively creating a second "blanket" to warm the surface. Estimate the equilibrium surface temperature of the earth that would result from this catastrophe. (Hint: First show that the lower atmospheric blanket is warmer than the upper one by a factor of 21/4. The surface is warmer than the lower blanket by a smaller factor.)
A 25.0 kg box slide 4.0m down the frictionless ramp shown in the figure then collides with a spring whose spring constant is 250N/m. What is the maximum compression of the spring?
Consider a frictionless track. A block of mass m1=10.0kg is released from A, at a height h=17.0m. It makes a head-on elastic collision at B with a block of mass m2=22.0kg that is initially at rest. Calculate the maximum height to which m1 rises after..
A car tire is 64.0cm in diameter. The car is traveling at a speed of 16.0m/s. What is the tire's rotation frequency
A 1.2 kilogram board 2.0 meter long is pivoted exactly at its center. A 4.6 kilogram box is at one extreme end. Find how far apart from the other end should a 7.5 kg box be placed
A single string is made up of two strings of different densities joined together. estimate what is the tension on the combined string
If a nearby building is the similar height and 55 meter away, find how far below the top of the building will the ball strike the nearby building
An object is 14 cm in front of a convex mirror. The image is 5.8 cmbehind the mirror. What is the focal length of the mirror?
To avoid hitting a pedestrian, a car driver slams on her brakes and comes to a complete stop after skidding 16 m. find the speed of the car when the brakes were applied
What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 515 turns, its secondary 8 turns, and the input voltage is 124 V, What is the power input
a cone with a base radius of r contains a charge inside its surface. the flux through the curved portion of the cones
What famous equation describes the relationship between mass and energy - Distinguish between the terms solar energy and solar power.
what is the minimum potential difference that must be applied to an x-ray tube to knock a k-shell electron completely
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