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Unreasonable Results
A physicist scatters γ rays from a substance and sees evidence of a nucleus 7.5×10-13 m in radius.
(a) Find the atomic mass of such a nucleus.
(b) What is unreasonable about this result?
(c) What is unreasonable about the assumption?
a charge of -3.00 microc is fixed at the center of a compass. two additional charges are fixed on the circle of the
A 30 kilogram child moving at 4 meters per second jumps onto a 50 kilogram sled that is initially at rest on a long, frictionless, horizontal sheet of ice determine the speed of the child sled system after the child jumps into the sled.
A wire with mass 38.0g is stretched so that its ends are tied down at points a distance 78.0cmapart. What is the speed of propagation of transverse waves in the wire
A racket ball is struck in such a way that it leaves the racket with a speed of 4.87m/s in the horizontal direction. Find the height of the racket ball when it left the racket
A metal sphere centered at the origin has a surface charge density that has a magnitude of 24.1 nC/m2 and a radius less than 2.00 m. What is the sign of the charge on the sphere
A light source for light scattering has a resistance of 160Ω. A DC voltage of 100 Volt is attached across it. Find the current through the source
On the Moon, the acceleration due to the effect of gravity is only about 1/6 of that on Earth. What is his weight as measured on the Moon
The motor in a toy car operates on 6.00 V, developing a 4.60 V back emf at normal speed. If it draws 3.00 A at normal speed, what current does it draw when starting?
It takes 16J of energy to move a 0.30-mC charge from one plate of a 15-?F capacitor to the other, How much charge is on each plat
A camera has a f=50 mm (f=5 cm) lens. A 1.0 mm (0.1cm) tall ant is 200 mm (20 cm) from the lens. Where should the film be placed
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 2.20 × 10-11 m. Determine the kinetic energy of the electron.
A 41.0 kilogram ballet dancer stands on her toes during a performance with four square inches (26.0 cm2) in contact with the floor. Evaluate the pressure exerted by the floor over the area of contact
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