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A child is twirling a 0.0215-kg ball on a string in a horizontal circle whose radius is 0.143 m. The ball travels once around the circle in 0.586 s.
(a) Determine the centripetal force acting on the ball.
(b) If the speed is doubled, by what factor does the centripetal force increase?
A 1500 ft2 wall has an R-value of 11.0 hr.oF.ft2/Btu, including the effects of the interior and exterior air layers. How many Btus are lost through this wall
What is the distance between the particles at this time? The Coulomb constant is 8.95755 × 109 N • m2/C2, the elemental charge is 1.6721 × 10-19 C, and the acceleration due to gravity is 9.8 m/s2.
From 2 meters inside the water, a fish sees the Sun at an apparent angle of 60.0° above the horizontal. What is the actual elevation angle of the Sun
Explain the di?erences between the electron energy spectrum of β- decay and that from an internal conversion process. What are the di?erences of these two decay mechanisms?
A large fish hangs from a spring balance supported from the roof of an elevator. What will the balance read if the elevator cable breaks
A proton is captured by an oxygen-16 atom which in turns emits a deuteron. find the mass number of the product isotope
Jack and Jill are standing on a crate at rest on the frictionless, horizontal surface of a frozen pond. Jack has a mass of 74.6kg , Jill has a mass of 44.0kg, What is the final speed of the crate if Jill jumps first and then Jack, again in the same..
A 99.5 kg horizontal circular platform rotates freely with no frictions about its center at an initial angular velocity of 1.77 rad/s. Find the angular velocity of the platform with its load
A glass sheet 1.10 ?m thick is suspended in air. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -4q. Sphere B carries a charge of -9q. How much charge ends up on sphere C
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 11.5 W. What is HooRU\'s temperature
Two thin convex lenses, A and B, lens A has a long focal length and lens B has a short focal length. which lens will produce an image at a smaller s'
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