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A 50 kg person climbing a rope slides down after reaching the top. The acceleration of the person downward is 2m/s^2. The frictional force acting upward on the person is?
A flashlight bulb with a resistance of 40 ohm is powered with a 6 volt battery and produces 0.75W of power. what is the voltage across the battery terminals when the light bulb is on
What is volume concentration
The allowed energies of a simple atom are 0.00 eV, 4.25eV , and 6.64eV. What wavelengths appear in the atom's emission spectrum
It is said that Galileo discovered a basic principle of the pendulum - that period is independent of the amplitude - by using his pulse to time the period of swinging lamps in the cathedral as they swayed in the breeze. assume that one oscillation..
A car travels along a straight line at a constant speed of 58.5 mi/h for a distance d and then another distance d in the same direction at another constant speed.
Smoke particles in the air typically have masses of the order of 10 to 16 kg. The Brownian motion (rapid, irregular movement) of these particles, resulting from collisions with air molecules, can be observed with microscope.
If the value of the linear charge density is ? = 40.5 ?C/m and the distance between the two cables is D = 40.5 m, calculate the electric field midway between the two cables
it accelerates with a constnat acceleration of 2.00 m/s^2 until its engines stop at an attitude of 200 m. the rocket continues move in free fall until its reaches the ground. Illustrate what is the total time the rocket is in the air?
A 6.00 V storage battery is connected to three resistors, 7.00 ?, 15.0 ?, and 20.0 ?, respec- tively. The resistors are joined in series. What is the current in the circuit
You have a compound microscope with a barrel of length 163 mm. Find the total angular magnification of the microscope for a person whose near point is 25.0 cm away
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
a satellite orbits the earth a distance of 1.50x10^7m above the planet's surface and takes 4.89 hours for each revolution about the earth. what is the acceleration of this satellite
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