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A 1.0 µCi 13755Cs source is used for 2.3 hours by a 80 kgstudent in a physics lab. Radioactive 13755Cs decays by ß- decay with a half-life of 30 years. The average energy of the emitted betas is about 190 keV per decay. The ß decay is quickly followed by a ? with an energy of 660 keV. Assuming the student absorbs all emitted energy, what effective dose (in rem) is received during lab?
question1an unmarked police car travelling a constant 93 is passed by a speeder. accurately 1.20 s after the speeder
a what is the escape speed on a spherical asteroid whose radius is 510 km and whose gravitational acceleration at the
An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.40 mm. If a 23.0 V potential difference is applied to these plates, calculate the electric field between the plates
A 6.0 μC negative charge is attracted to a large, well-anchored, positive charge. Find how much kinetic energy does negatively charged object gain
A rubber ball with a radius of 3.2 cm rolls along thehorizontal surface of a table with constant linear speed v. Whenthe ball rolls off the edge of the table, it falls 0.66 m to thefloor below. If the ball completes 0.37 revolution during its fall, w..
A spring with k=620 N/M is stretched with a tension of 40 N. What is the potential energy of the stretched spring
Four point charges have the identical magnitude of 2.52 x 10-12 C and are fixed to the corners of a square that is 4.02 centimeter on a side. Find the magnitude of the net electric field that exists at the center of this square
A rectangular loop of wire is placed next to a straight wire, as shown in the (Figure 1) . There is a current ofI = 4.5A in both wires
a 43.5 kg boy and a 56.0 kg girl are on the surface of a frozen lake 15.0 m apart. using a rope the boy exerts a
the temperature of a body is increased from -173 c to 357 c. what is the ratio of energies emitted by the body per
An ideal monatomic gas initially has a temperature of 330 K and a pressure of 7.00 atm. It is to expand from volume 530 cm3 to volume 1600 cm3. what are the final pressure and the work done by the gas
A skier leaves the horizontal end of the ramp with a velocity of 25m/s and lands 70 meters from the base of the ramp. How high is the end of the ramp above landing area
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