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The power radiate by a distant star is 6.2 x 10^27 W. The radius of the star, which may be considered a perfect radiator, is 1.06 x 10^10 m. Determine the surface temperature of the star.
an m1400-kg car is on a horizontal dry road that has a coefficient of static friction 0.8. the coefficient of kinetic
A tennis ball may leave the racket of a top player on the servewith a speed of 67.0 m/s. what is the average force on the ball
Converting sunlight to electricity with solar cells has an efficiency of 15%. It's possible to achieve a higher efficiency (though currently at higher cost) by using concentrated sunlight as the hot reservoir of a heat engine. What is the theoreti..
A cockroach crawls with a constant speed on a phonograph turntable that is rotating with angular velocity ?. If the bug moves at constant speed away from the center of the turntable draw all forces acting on the bug (in the bug's frame).(b) Now sa..
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that height?
An initially stationary 2.0 kg object accelerates horizontally and uniformly to a speed of 20 m/s in 1.9 s. (a) In that 1.9 s interval, how much work is completed on the object by the force accelerating it.
Discover the electrostatic potential energy of a cubical configuration of point charges as shown in the figure. Each of the charges is 8.00e and the edge of the cube is 10 cm.
Light of wavelength 480 nm in air falls ontwo slits 6 * 10^-2 mm apart. How far apart are the fringes on the screen
find frequencies of vibration of the piano wire. Car 1 has 3 times the mass of car 2, but only 0.5 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
A proton and an electron are moving due east in a constant electricfield that also points due east. The electric field has a magnitudeof 3.0 x104 N/C. Determine the magnitude of the acceleration of the proton and the electron.
suppose a heat engine pulls 7.24times104 j of work from the hot reservoir and 1.35times104 j of that energy is used to
You are standing on a platform and you throw a 5kg ball horizontally with a speed of 10m/s. Find the time it takes the ball to hit the ground
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