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A web page designer creates an animation in which a dot on a computer screen has a position of r? =[ 4.2cm +( 2.3cm/s2 )t2]i^+( 4.5cm/s )tj^.
Part A Find the average velocity of the dot between t=0 and t=2.0s?
A 20.00 kg child is on a swing that hangs from 3 m long chains. What is her maximum speed if she swings out to a 45.0 o angle.
Two small metallic spheres, each of mass m = 0.212 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.9 nC, and they come to equilibrium when each string is ..
Originally, light is unpolarized. It then travels through 3 polarizers: the first with its transmission axis aligned vertical, What is the intensity of light after the third polarizer
A 128 carton is pulled up a frictionless baggage ramp inclined at 30.0 above the horizontal by a rope exerting a 72.60 pull parallel to the ramp's surface. If the carton travels 5.20 along the surface of the ramp, compute the work done on it by the r..
Sketch a graph of maximum kinetic energy, KE max against visible light frequency, v for this experiment Label threshold frequency Vc.
Use the surface energy balance equation to calculate the latent heat flux given that the Bowen ratio is 0.6, the net incoming radiation is 50 J m-2 s-1
A styrofoam cooler (k = 0.030 W/(m·K)) has outside dimensions of 0.270 m by 0.230 m by 0.280 m, and an average thickness of 2.6 cm. About how long would it take for 1.60 kg of ice at 0 °C to melt in the cooler if the outside temperature is 30.0 °C..
the mean fee path of air molecules at 0 C and 1 ATM is about 2*10^-5 cm. what is the effective molecular diameter of an air molecule
A car of mass 920.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 41.0 km/hr (11.4 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resista..
Find the center of mass of a system composed of three spherical objects with mass of 3.0kg, 2.0kg, and 4.0kg
The nonconservative wind and lift forces take the balloon up, doing +9.70 104 J of work on the balloon in the process. Illustrate at what height above the surface of the earth does the balloon have a speed of 8.90 m/s?
A sample of animal bone unearthed at an archaeological site is found to hold 173 grams of carbon and the decay rate of 14-C in the sample is measured to be 8.10 Bq. How old is the bone.
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