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Q. What is the minimum length of the string whose fundamental frequency is 272Hz? The speed of sound at this temperature is 340m/s.
Q. Two unequal point charges q1 and q2 are held in place unconnected from each other. A point charge Q is placed somewhere between them at a point where it remains stationary when free. From this observation, we can conclude that q1 and q2 must either both be positive or both be negative.
Objective questions based on kinematics.
A 378 N, uniform, 1.56 m bar is suspended horizontally by two vertical cables at each end. Cable A can support a maximum tension of 502.0 N without breaking, and cable B can support up to 397.0N. You want to place a small weight on this bar. What is ..
What is the strength of the electric field.
A 5.00 x 10^4 kg space probe is travelling at a speed of 14000 m/s through deep space. Retrorockets are fired along the line of motion to decrease the probe's speed. The retrorockets generate a force of 4.00 x 10^5 N over a distance of 2600 km. What ..
What magnetic field strength produced by Helmholtz coils
An electric field of 300 V/m is confined to a circular area d = 11.1 cm in diameter and directed outward perpendicular to the plane of the figure. If the field is increasing at the rate of 22.0 V/m·s, what are direction and magnitude of the magnet..
A potential difference of 81 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the ce..
Assuming biological substances are 98 percent water, estimate the masses of a cell with a diameter of 0.7 µm, a human kidney, and a fly. Take a kidney to be roughly a sphere with a radius of 5.0 cm and a fly to be roughly a cylinder 4.90 mm long a..
Find out the maximum distance d (along the ladder) that the monkey can climb up ladder before the rope breaks.
A 320 piano slides 3.3 down a 24 incline and is kept from accelerating by the man who is pushing back on it parallel to the incline. Determine the work done by the man on the piano.
Introductory Mechanics: Calculate the smallest coefficient of static friction
An unmarked police car, travelling a constant 94 km/h, is passed by the speeder travelling 153 km/h. precisely 0.70 s after the speeder passes, policeman steps on the accelerator. If the police car's acceleration is 2.30 m/s^2, how much time elapses ..
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