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How much heat in kcal must be added to 0.60 kg of water at room temperature (20°C) to raise its temperature to 46°C?
A piano tuner plays an out of tune A note on his piano and then strikes his 440 Hz tuning fork. What was the frequency of the note before he loosened the string
a proton has an initial speed of 3.5 105 ms. a what potential difference is required to bring the proton to rest? b
Suppose you throw a 0.058-kg ball with a speed of 10.9 m/s and at an angle of 30.9° above the horizontal from a building 10.8 m high. What will be its speed when it hits the ground
q1. a 4.20 kg model rocket is launched expelling 57.0 g of burned fuel from its exhaust at a speed of 675 ms. what is
A submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the Sun appears to be 35o from the vertical. At what angle above the horizon does the friend see the sun
When we look at a particular star, we are seeing it as it was 878 years ago. How far away from us (in meters) is the star
An automobile suspension involves both leaf springs with stiffness k and shock absorbers resist motion with a force -uv. The system is critically damped. If a car has mass 2000 kg and has shock absorbers with u = 2.5 x10^4 kg/s, how much should the c..
The rope wrapped around the outer diameter of the disk is pulled at a constant speed of 1.06 m/s. find how fast does the hanging mass rise
A small, 300 g cart is moving at 1.60 m/s on an air track when it collides with a larger, 1.00 kg cart at rest. After the collision, the small cart recoils at 0.890 m/s.
A basketball star covers 2.6 m horizontally in a jump to dunk the ball. His motion through space can be modelled precisely as that of a particle at his center of mass. His center of mass is at elevation 1.02m when he leaves the floor. It reaches a..
A car moves along an x axis through a distance of 950 m,starting at rest (at x = 0) and ending at rest (atx = 950 m). Through the first 1/4 of that distance, itsacceleration is +6.25 m/s2.
a disk of radius 1.2 cm has a surface charge density of 7.0 microcm2 on its upper face. what is the magnitude of the
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