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Q. Assume a neuron in the brain carries a current of. Treating the neuron as a straight wire, what is the magnetic field it produces at a distance of 7.50?
Q. when one person was talking in a small room, the sound intensity level was dB everywhere within the room. Then, there were 14 people talking in similar manner simultaneously in the room, what was the resulting sound intensity level?
What is instantaneous acceleration
Use the binomial expansion to find an approximate expression
A flowerpot falls off a windowsill and falls past the window below. You may ignore air resistance. It takes time 0.420s to pass this window, which is of height 1.92 m. How far is the top of the window below the windowsill from which the flowerpot ..
A 4.79 crate is suspended from the end of a short vertical rope of negligible mass. An upward force is applied to the end of rope, and the height of the crate above its initial position is given by + (0.61) what is the magnitude of the force when ..
A flight attendant pulls her 72.0 N flight bag a distance of 282 m along a level airport floor at a constant speed. The force she exerts is 33.0 N at an angle of 52.0° above the horizontal.
What is tension in each of the cables
A microscope with an eyepiece lens of focal length 1.90 cm and an objective lens of focal length 1.15 cm is used to examine a section of the brain of a sacrificed rat. The distance between the lenses of the instrument is 24.0 cm and final image is vi..
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..
What focal length does the lens require
An alpha particle (m = 6.7 ´ 10-27 kg, q = +3.2 ´ 10-19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out an electric potential difference V..
A ball with a mass of 0.75 kg is thrown vertically into the air with an initial velocity of 10 m/s. establish the velocity of the ball when it hits the ground if it was initially released 2.0 m above the ground.
The coefficient of kinetic friction between a 20 Kg box and the floor is 0.40. How much work does a pulling force do on the box in pulling it 8.0 m at the constant speed? The pulling force is directed 390 above the horizontal.
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