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Two resistors (connected in series with each other) and a 10 Vbattery are connected in a loop. The voltage drop across the firstresistor is 2 V. What is the voltage drop across the second resistor?
A skier wears a jacket filled with goose down that is 15 mm thick. Another skier wears a wool sweater that is 7.00 mm thick. Both have same surface area.
Consider a gas of neutrons in a nuclear reactor. The neutron density is 10^8 neutrons/cm^3 in an operating reactor which has a core temperature of 535K. Are the neutrons in the reactor core a classical gas or a quantum mechanical gas and how can y..
A 2.20-g bullet embeds itself in a 1.60-kg block, which is attached to a spring of force constant 760 N/m. Find the time for the bullet-block system to come to rest
A sound wave of frequency 400 Hz has an intensity of 2.00 µW/m2. What is the amplitude of the air oscillations
A swift blow with the hand can break a pine board. As the hand hits the board, the kinetic energy of the hand is transformed into elastic potential energy of the bending board; if the board bends far enough, it breaks. what is the average force on..
The acceleration of gravity at the surface of the moon is approximately 1/6 that at the surface of the earth (9.8 m/s2). What is the weight of an astronaut standing on the moon
A radar unit sends out 0.05 microsecond pulses of microwaves whose wavelength is 25 mm. What is the frequency of these microwaves
An applied force F1= 16N acting on an object with the mass m = 2 kg which is moving on the surface of a table. find the coefficient of friction between the object and the table
An electron is released from rest at a perpendicular distance of 10.8 cm from a line of charge on a very long nonconducting rod. That charge is uniformly distributed, with 8.1 μC per meter. What is the magnitude of the electron's initial acceleration..
Humans cool off by perspiring; the evaporating sweat removes heat from the body. what is the entropy change of the universe due to the evaporation of 215 mL of sweat
If coefficient of kinetic friction between the box and the floor is 0.570, how long does it take to move the box 4.00 m, starting from rest.
A 8.0 W laser beam shines on an ensemble of 10^24 electrons, each in the ground state of a one-dimensional infinite square well 0.80nm wide. How many electrons can be so excited if the beam shines for 15 ms
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