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A small drop of water is suspended motionless in air by auniform electric field that is directed upward and has a magnitudeof 8500 N/C. The mass of the waterdrop is 3.20 10-9kg.
How many excess protons reside on the drop?
A 9.0*10^-2kg ice cube at 0.0 degrees celcius is dropped into a styrofoam cup holding .35 kg of water at 13 degrees celcius. Find the amount of ice (if any) remaining
A circular solenoid contains 100.0 turns of wire and carries a current of 2.0 amps. Calculate the magnetic flux through one turn of the wire
6 kg of an ideal gas is in a volume of 1 m3 at 250°C. The gas undergoes a constant pressure change of state until the temperature is 500°C. Find the pressure at the initial state
You are asked to design a robot that can right itself once it is left to free-fall. Bioinspired from a cat, specify the hardware components and the minimum number of body segments that are needed to achieve this task. Qualitatively state the “rela..
A coil of wire with a resistance of 0.45 ohm has a self-inductance of 0.083 H. If a 3.0-V battery is connect across the ends of the coil, what is the stored energy in the inductor
An air-filled parallel-plate capacitor has a capacitance of 1.1 pF. The separation of the plates is doubled and wax is inserted between them, Find the dielectric constant of the wax
An electron is released from rest1.5cm from an infinite charged plane. It accelerates toward the plane and collides with a speed of3.0107m/s. What is the surface charge density of the plane
A proton is released from rest at point A, which is located next to the positive plate of a parallel plate capacitor. Determine the radius of the circular path on which the proton moves in the magnetic field
The drawing shows three identical springs hanging from the ceiling. determine the weight of the block hanging from the third spring
A He-Ne laser produces light of wavelength 633 nm with intensity 1.05 103 W/m2, over a beam of cross-sectional area 1.03 mm2. How many photons per second are emitted by the laser
Suppose a beam of 5.0 eV protons strikes a potential energy barrier of height 5.5 eV and thickness 0.59 nm, How long would you have to wait-on average-for one proton to be transmitted
A board, with a mass m = 20.0 kg and a length of 4.00 m, is supported by two identical vertical connected to the ends of the board, What are the tensions in the two ropes
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