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In the Bohr model of the hydrogen atom, an electron (mass m=9.1×10^?31kg) orbits a proton at a distance of 5.3×10^?11m. The proton pulls on the electron with an electric force of 8.2×10^?8N.
How many revolutions per second does the electron make?
rev/s
A force with a magnitude of 452N is used to bring an object with a mass of 56.0 kg moving at a velocity of 155m/s. How long will it take to bring the object to a full stop.
Two 22.3-cm-focal-length converging lenses are placed 16.5?cm apart. An object is placed 35.0?cmin front of one lens. obtain the total magnification
A candle is on the axis of a 15-cm-focal-length concave mirror, 36 cm from the mirror. Is the image real or virtual
A current of 22.0 mA is maintained in a single circular loop of 1.90 m circumference. A magnetic field of 0.830 T is directed parallel to the plane of the loop. Calculate the magnetic moment of the loop
500 mL of a liquid with a coefficient of volume expansion of 205x10-6/oC fills to the brim a container that has a coefficient of volume expansion of 105x10-6/oC. how much of the liquid will overflow the container
What is the block's distance from equilibrium as the speed are 36 cm/s? What is block's position at t=1.0 s.
the altitude of a hang glider is increasing at a rate of 6.80 m/s. At the same time, Find the magnitude of the glider's velocity
A coin is placed 8 cm in front of a concave morror. T he mirror produces a real imege that has the diameter 4 times larger than that of the coin. What is the image distance.
Water can hold 36 grams (g) of salt in every 100 milliliters (mL). The ocean contains 3.6 g of salt in every 100 mL. As a solution, which is seawater.
Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, illustrate what would be the recoil speed of the thorium nucleus?
What is the kinetic energy of a 1500 kg car traveling at a speed of 35 m/s (76 mph), Does your answer to part b depend on the car's mass
A +44 nC charge is placed on the z- axis at (0,0,5 cm). A grounded conducting plane fills the x-y plane where z=0. A) Find the surface charge charge density on the conducting plane at the origin.
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