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A car is hauling a 92 kilogram trailer, to which it is connected by a spring. The spring constant is 2300 N/m. The car accelerates with a acceleration on 0.30m/s2. Calculate how much the spring stretches?
An elevator is able to raise 9,800 N to a height of 22 m in 14 s. How much work does the elevator do
When you take a bath, how many kg of hot water (49 oC) must you mix with cold water (13 C) so that the temperature of the bath is 36 oC? The total mass of the water (hot and cold) is 191-kg.
A space traveller weighs herself on Earth, at a location where the acceleration due to gravity is 9.82 m/s2, and finds a value of 599 N. What is the traveller\'s mass on the planet
A bicycle slows down uniformly from v0 = 8.40 m/s to rest over a distance of 115m. Each wheel and tire has an overall diameter of 68.0 cm. determine the angular acceleration of the wheel
Figure below shows two circular regions R1 and R2 with radii r1 = 21.9 cm and r2 = 31.0 cm. In R1 there is a uniform magnetic field of magnitude B1 = 52.7 mT directed into the page, and in R2 there is a uniform magnetic field of magnitude B2 = 76.2 m..
The electric potential in a certain area is given as: V = 3x^2 + 5yz. what is the electric field in the area
An elevator is moving downward but has a constand upwardacceleration of a=3.5m/s2, how long dose it take the coin to strike the elevator floo
A heat rate of 3kW is conducted through a section of an insulatingmaterial of cross-sectional area 10m2 and thickness2.5cm. If the inner (hot) surface temperature is 415oCand the thermal conductivity of the material is 0.2 W/m.K, what is the outer su..
A boy throws a ball into an open window 10m above his shoulder at 65 degrees with the horizontal. He observes that the ball flies in horizontal. A. What is the initial speed of the ball
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles, What is the force between the two alpha particles when they are 5.60 10-15 m apart
A projectile is fired with an initial speed of 60.7 m/s at an angle of 35.4 above the horizontal on a long flat firing range. Determine the total horizontal distance covered
Electron A has a De Broglie wavelength (lambda). If electron B has twice the kinetic energy of electron A, the de Broglie wavelength of electron B is: A) 2lambda B) lamda * square root 2 C) lambda/ square root 2 D) lambda/ 2
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