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A point source of light is submerged 2.8 mbelow the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the areailluminated is a circle. What is the maximum radius that this circle could have?
m
A bottle has a mass of 35.00 g when empty and 98.44 g when filled with water. When filled with another fluid, the mass is 88.78 g. What is the specific gravity of this other fluid
A 0.025 kg golf ball moving at 21.0 m/s crashes throughout the window of a house in 2.0 10-4 s. After the crash, ball continues in the same direction with a speed of 10 m/s. assuming the force exerted on the ball by the window was constant, what w..
A mercury thermometer is constructed as shown below. Find the change in height of the mercury column that occurs with a temperature change of 24.0°C
In a simple model for a radioactive nucleus, an alpha particle ( m = 6.64 * 10^-27 kg) is trapped by a square barrier that has width 2.0 fm and height 30.0 MeV. What is the tunneling probability
It is determined by immersing a crown in water that its volumeis 26 in.3 = 0.0015 ft3. What would its weight be if it were made of pure gold
An unknown material has a normal melting/freezing point of -21.7 °C, and the liquid phase has a specific heat capacity of 163 J/(kg C°). One-tenth of a kilogram of the solid at -21.7 °C is put into a 0.163-kg aluminum calorimeter cup that contains..
An electron travels with speed 1.0*10^7 m/s between two parallel charged plates. The plates are separated by 1.0 cm, What is the direction of the magnetic field
(a) If the elevator moves with an upward acceleration a with arrow of magnitude 2.0 m/s2, find the tensions T1 and T2 in the upper and lower strings. T1 = N T2 = N
the radii of curvature of the surfaces of a thin converging meniscus lens are r1 12.0 cm and r2 28.0 cm. the index
You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. calculate with what speed do you and the ball move afterwards
Calculate the energy and velocity of the a-particle - prove that the final energy of the a-particle is given by
The second harmonic sinusoidal standing wave in a pipe with both ends open has a wavelength of 2m. The sound speed is 340 m/s. What is the frequency of the fundamental mode in this pipe
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