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1. A proton initially moves left to right along the x-axis at a speed of 2.0 x 10^5 m/s. it moves into an electric field that points in the negative x-direction, and travels a distance of 0.20m before coming to rest. Assuming the electric field is constant in this region of space, calculate the electrical potential difference (in V) over this distance.
a. -120
b. 210
c. 360
d. 470
2. Two resistors of values 6.0 ohm and 12.0 ohm are connected in parallel. This combination is hooked in series with a 2.0 ohm resistor and a 24.0V battery. What is the voltage (in V) across the 2.0 ohm resistor?
a. 6.4
b. 8.0
c. 9.6
d. 12.0
e. 14.4
A cylinder like an oil drum is being rolled across a level floor by a force ~F applied horizontally to the top. find the force of friction between the cylinder and the floor
A parachute dropped from a 30 meter-high cliff falls with a constant velocity of 1.5 meters per second. How long does it take for the stone to hit the ground
q1. brass is an alloy made from copper and zinc. a .59 kg brass sample at 98 c is dropped into 2.8 kg of water at 5 c.
Monkey first notices a lion attacking when the lion is 12.5 m away and moving toward the monkey at a speed of 5 m/s. How long does the monkeys escape last
a proton has a speed 4.5*10^5 m/s at a point where electrical potential is 900V. it moves through a point where the electric potential is 500V. find the kenetic energy of proton at first point
If the phase angle for a block-spring system in SHM is π/8 rad and the block’s position is given x = xm cos(ωt + ?),what is the ratio of the kinetic energy to the potential energy at time t = 0?
The magnetic field produced by an MRI solenoid 2.7m long and 1.7m in diameter is 1.9T. Find the magnitude of the magnetic flux through the core of this solenoid
when mass m is at the position shown it is sliding down the inclined part of a slide at a speed of 2.27 ms. the mass
A ball is dropped from a high building. Using the approximate value of g = 10 m/s2, find the change in velocity between the fourth and fifth second of its flight
A 0.40-kg iron horseshoe is dropped into 1.15L of water in a 0.34-kg iron pot initially at 20.0?C. Determine the initial temperature of the hot horseshoe.
The tires of a car make 75 revolutions asthe car reduces its speed uniformly from 100 km/h to 50 km/h. Thetires have a diameter of 0.80 m. What was the angular acceleration?
One mole of a dilute gas initially has a pressure equal to 1.00 atm, and a volume equal to 23.0 L and an internal energy of 3.49 kJ. Find the heat absorbed by the gas
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