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Q1. The two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is the maximum initial speed v0 the electron can have without hitting the negative plate?
Q2. A 43 cm length of wire has a mass of 7.0 g. It is stretched between two fixed supports and is under a tension of 143 N. What is the fundamental frequency of this wire?
What is the friction force that acts on the firefighter. find Max wavelength and Min wavelength.
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 19.4g
A water molecule, which is electrically neutral but has a dipole moment of magnitude p = 6.20·10-30 C m, is 3.20 cm away from a point charge q = +6.90 ?C, Calculate the magnitude of the net force
A freezer has a coefficient of performance of 2.40. The freezer is to convert 1.98kg of water at 26.0 oC to 1.98kg of ice at -5.00 oC in 1 hour. How much wasted heat is rejected to the room in which the freezer sits
A 1590 kg car starts from rest on a horizontal road and gains a speed of 61 km/h in 30 s (a) what is its kinetic energy at the end of the 30 s.
question1a plane leaves the airport in galisteo and flies 170 km at 68deg east of north and after that changes
Suppose that earth was formed as molten rock at some very high temperatures. Estimate the time for the earth to cool to 300 K.
An oscillating LC circuit has a current amplitude of 10.5 mA, a potential amplitude of 276 mV, and a capacitance of 240 nF. What are the maximum rate at which the inductor gains energy
500 mL of a liquid with a coefficient of volume expansion of 267x10-6/oC fills to the brim a container that has a coefficient of volume expansion of 99x10-6/oC. how much of the liquid will overflow the container
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
The angular position of a point on the rim of a rotating wheel is given by ? = 7.68t - 5.13t2 + 1.73t3, where ? is in radians and t is in seconds. find the angular velocities at the end of this time interval
Starting from rest, a 12-cm-diameter compact disk takes 3.3s to reach its operating angular velocity of 2500rpm. How much torque is applied to the disk
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