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A proton with a speed of 2.5 × 106 m/s is shot into a region between two plates that are separated by a distance of 0.16 m. As the drawing shows, a magnetic field exists between the plates, and it is perpendicular to the velocity of the proton. What must be the magnitude of the magnetic field, so the proton just misses colliding with the opposite plate?
How many electrons should be transferred from the plate. When you enter your answer, leave off the unit rm dB.
A 120cm3 box contains helium at a pressure of 1.50atm and a temperature of 80.0?C. What is the initial thermal energy of each gas
The first skater carries a 2-m pole that may be considered massless. As he passes the pole, What is the angular speed after the skaters are linked together
The Space Shuttle travels at a speed of about 7.6 × 103 m/s. The blink of an astronaut's eye lasts about 110 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye
Under favourable circumstances the human eye can detect 1.0e-18 J of electromagnetic energy. How many 600-nm photons does this represent.
A fish in a flat-sided aquarium sees a can of fish food on the counter. What is the actual distance between the can and the aquarium
Capacitance and resistance network.
An air conditioner connected to a 120 V rms ac line is equivalent to a 14.9 ? resistance and a 1.39 ? inductive reactance in series. calculate the impedance of the air conditioner
An air conditioner operating between 86°F and 72°F is rated at 4000 Btu/h cooling capacity. What horsepower is required of the air conditioner motor
A proton accelerates from rest through 1500 volts. the proton then enters a region of space where the magnetic field is 0.3 tesla (and this field is perpendicular to the velocity). calculate the radius of the resulting circular motion?
A 74.8 g sample of copper at 143.2°C is added to an insulated vessel containing 165 mL of glycerol, C3H8O3 (l) (d = 1.26 g/mL), at 24.8°C. The final temperature is 31.1°C. The specific heat of copper is 0.385 J g-1°C-1
One end of a long rod (n=1.5) is formed into a convex surface with a radius of curvature of 6cm. Find the image and object focal lengths, f' and f, and mark the locations of the foci in your to-scale sketch
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