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The positron is a particle with the same mass as an electron but charge +e. A positron in a bubble chamber moves perpendicular to a 3.0T magnetic field. If the positron's kinetic energy is 24eV , what's the radius of its trajectory in the bubble chamber?
Take the initial direction of motion to be the positive direction. (Indicate the direction of the acceleration by the sign of your reply.)
Alkaid and Merak are 25.6 ? apart in the earth's sky. Find the distance in light years from Alkaid to Merak
Some bacteria are propelled by biological motors that spin hair-like flagella. How long does it take the motor to make one revolution
automobile accident analysis you are called as an expert witness to analyze the following auto accident ca b of mass
The highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15.2 cm (6 in.) long. What is the period of rotation of the rod
a 150g of aluminum at an initial temperature of 100 c is placed in 1.00 kg of water at 20.0c What is the final temperature of the mixture
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net (see the drawing). Suppose that you lob the ball with an initial speed of 17...
A ruby laser emits an intense pulse of light that lasts a mere 10 ns. The light has a wavelength of 690 nm, and each pulse has an energy of 400 mJ. How many photons are emitted in each pulse
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air, that the patient and platform start from rest, determine the recoil velocity
A capacitor is connected across an ac generator whose frequency is 753 Hz and whose peak output voltage is 140 V. The rms current in the circuit is 3.0 A. What is the capacitance of the capacitor
A homemade capacitor is assembled by placing two 9-in. pie pans 4cm apart and connecting them to the opposite terminals of a 6-V battery, Estimate the work done by the battery to charge the plates
A converging lens (f = 10.8 cm) is located 32.9 cm to the left of a diverging lens (f = -6.06 cm). Locate the final image of the stamp relative to the diverging lens
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