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An early model of the hydrogen atom viewed it as an electron orbiting a proton in a circular path with a radius of 5.29×10?11m. What would be the speed of the electron in this model
A bolt drops from the ceiling of a moving train car that is accelerating northward at a rate of 2.09 m/s2. What is the acceleration of the bolt relative to the train car
A bungee jumping mime is attached to a bungee cord 25.0 m long. The mime is in freefall until he gets to the end of the bungee, Find the maximum speed attained by the mime
A disgusted physics student wads up her homework and throws it downward into a trash can. with what speed was the homework hurled
Two point charges each have a value of 30.00 x 10^-3 and are separated by a distance of .04m what is the electric field midway between the two charges
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How long will the mortar shell remain in the
Two protons are moving directly toward one another. When they are very far apart, What is the distance of closest approach
When the brakes of a certain car are applied, a deceleration of 6.0 m/s^2 is produced. How far will it travel in that time
Oppositely charged parallel plates are separated by 4.79 mm. How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.06 mm from the positiveplate
A potential difference of 100 mV exists between the inner and outer surfaces of a cell membrane. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell
At a certain instant a particle (mass=0.5 kg) is moving in the +x direction with velocity 14 m/s. What is the magnitude of the momentum of the particle (in kg*m/s) at the end of this 0.15 second in
A uniform electric field of magnitude 415 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. What is the work done by the field on the electron
Assume that the sun radiates as a blackbody , if Lp=5000A for the solar spectrum, what is the surface temperature of the sun
suppose the driver in this example now slams on the brakes, stopping the car in 4.00s. find the acceleration and the distance the car traveled while braking
using planck's law, Evaluate the Stefan-Boltzmann constant and Evalute the constant in the wien displacement law
Four charges of equal magnitude Q = 65 nC are placed on the corners of a rectangle of sides D1 = 25 cm and D2 = 10 cm. calculate the numeric value for the vertical force
Two capacitors give an equivalent capacitance of 10.00 pF when connected in parallel and an equivalent capacitance of 1.55 pF, What is the capacitance of each capacitor
When a mass is suspended from a spring, the equilibrium length is increased by 50mm. Find the period and amplitude of the resulting oscillations
A bartender slides a beer mug at 1.6 m/s towards a customer at the end of a frictionless bar that is 1.6 m tall. What are the speed and direction of the mug at impact
A gas is kept at constant pressure. If its temperature is changed from 15 to 145°C, by what factor does the volume change
A car is driving directly north on the freeway at a speed of 101 km/h and a truck is leaving the freeway driving 90 km/h in a direction that is 34° west of north
If a capacitor has opposite 5.3?C charges on the plates, and an electric field of 2.4kV/mm is desired between the plates, what must each plate's area be
A plane mirror is lying flat in the x-y plane with its reflecting surface facing up. A point source of light is located at (x=0.0 m, y=2.0 m, z=3.0 m). What is the distance from the object to the im
An unmarked police car traveling a constant 85km/h is passed by a speeder. what was the speeder's speed
A neutron star is the remnant left after certain supernovae (explosions of giant stars). What is a typical neutron star density in g/cm3