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In the figure below, a battery of potential difference V = 38 V is connected to a resistive strip of resistance R = 8.0 Ω. When an electron moves through the strip from one end to the other, (a) in which direction in the figure does the electron move (1 = upward, 2 = downward), (b) how much work (in eV) is done on the electron by the electric field in the strip, and (c) how much energy (in eV) is transferred to the thermal energy of the strip by the electron?
suppose that an ion source in a mass spectrometer produces doubly ionized gold ions au2 each with a mass of 3.27 times
The average intensity of sunlight at the top of the earth's atmosphere is 1385 W/m2. What is the maximum energy
A laser emits a cylindrical beam of light 2.8mm in diameter.If the average power of the laser is 2.6mW , what is the rms value of the electric field in the laser beam?
The output signal intensity of the transducer is 40 Watt / cm2. The echo returning from a reflector deep inside the patient is 0.025 Watt / cm2. How many dB is the ratio of output signal to echo?
A rifle with a weight of 35 N fires a 3.0-g bullet with a speed of 230 m/s. Find the recoil speed of the rifle
A lamp (R = 154 Ω), anelectric heater (R = 24Ω), and a fan (R = 48Ω) are connected in parallel across a 117 V line. What total current is supplied to the circuit?
A rocket is fired straight upward from rest with an acceleratrion of 5 m/s^2. It maintains acceleration until it is 1300 m above the ground, What is the Rocket's velocity, Find the total amound of time the rocket is in the air
A 6.4 kg freight car is coasting at a speed of 46.3 m/s along a straight track when it strikes a 15.8 kg stationary freight car and couples to it. What will be their combined speed after impact
One kilogram of water is heated from an initial temperature of 283K to a final temperature of 372K. Calculate the change in entropy. Assume the specific heat of water to be 4186 J/kgK. Hint: the amount of heat gained is a function of the temperature.
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. If the U.S. burns 200 million of gallons of gasoline every year, how many billions of lbs of CO2 are emitted every year?
A coil with area 2.0m2 rotates in a 0.010T magnetic field at a frequency of 60Hz. How many turn are needed to generate a peak voltage of 160V
a ball dropped from a height of 4.00m makes an elastic collision with the ground. assuming no mechanical energy is lost
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