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(a) When a Proton-beam approaches the nucleus of a gold-atom, it is Scattered at large angles. Consider the kinetic energy of a proton beam as 7.7 MeV. If the proton's closest approach is Rp; Estimate the Size of the gold-nucleus The atomic number of Au is Z=79 and remember that the proton has a charge q=+e Besides the calculation's, you may briefly discuss your logical approach for finding Rp.
A kayak on a lake is moving at a constant speed of 4.3 m/s in a direction 40.7° north of west. After 30 min, How far north the kayak has traveled
a thief stole a box with valuable article of weight lsquow and jumped down a wall of height h. before he reaches what
A common flashlight bulb is rated at 0.300 A and 3.00 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 1.70Ω, what is the temperature of the filament when the b..
A 143 O lamp, a 29 O electric heater, and a O 53 fan are connected in parallel across a 135 V line. What power is expended in the heater
The maximum current an ac device draws is 1.80 A when connected to a 120 V outlet. What is the effective current of the device
Sand from a stationary hopper falls onto a moving conveyor belt at the rate of dm/dt = 5 kg/s, Find the sand's rate of change of momentum in the horizontal direction
you are investigating an avalanche scene where a boulder of massm and radius r rolled down a slope of angle theta from
An object fired at an angle of 19.1° above the horizontal takes 2.61 s to travel the last 15.3 m of its vertical distance and the last 10.3 m of its horizontal distance. With what speed was the object launched
A skydiver with his parachute has a combined mass of 79 kg and an approximate frontal area of 0.71 m^2. Calculate the terminal velocity of this skydiver in a horizontal position
At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.0 m/s2. How fast will the automobile be traveling at that instant
Use the ideal gas approach to find the thermal velocity, and determine the scaling law based on the resulting equation
The electromagnetic wave used in a microwave oven have a wavelength of about 12.228 cm. What is the frequency of the radiation
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