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The temperature at a point 31 miles north of a station is 5.5 F cooler than at the station. If the wind is blowing from the northeast at 45mph and the air is being heated by radiation at the rate of 1 degree celcius per hours, what is the local temperature change at the station?
A large solar panel on a spacecraft in Earth orbit produces 1.8kW of power when the panel is turned toward the sun. What power would the solar cell produce
A car crashes into a wall at 25 m/s and its contents are brought to rest in 0.1s. display that the average force exerted on a 75-kg test dummy by the seat belt is more than 18,000 N.
If the marble bounces straight upward to a height of 0.630 m, what is the magnitude and direction of the impulse delivered to the marble by the floor
The nucleus of a helium atom contains two protons. In a simple model of this nucleus, What is the electric potential energy of the two protons
In a new (inelastic) collision, the same two bumper cars with the same initial velocities now latch together as they collide. What is the final speed of the two bumper cars after the collision
A rock thrown horizontally from the top of a radio tower lands 22.0 m from the base of the tower. how high is the tower
A glacier moves with a speed of 54 nm/s. How many years would it take for the glacier to move 0.81 km
if we have an electron orbiting an atomic nucleus. we may think the electron is doing a circular motion around the
The engine of a large ship does 2.10 ? 108 J of work with an efficiency of 4.00%. How much waste heat is produced
A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.63 of the person's regular weight. Calculate the magnitude of the acceleration of the elevator
a camera lens n 1.50 is coated with a thin film of potassium bromide n 1.56 of thickness 87.9 nm. what wavelength in
A soccer ball is kicked from the groundwith an initial speed of 19.9 m/s at anupward angle of 45°. A player 55 m away in the direction of thekick starts running to meet the ball at that instant. What must behis average speed if he is to catch the bal..
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