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If a neutral metal sphere is connected to ground through a wire, when a positively charged glass rod comes close to the sphere, electrons are attracted to the positively charged glass rod. When the wire is then cut, the metal sphere.
What was the displacement of the spring. An elevator and its load have a combined mass of 1400 kg. Find out the tension in the supporting cable when the elevator, originally moving downward at 12 m/s, is brought to rest with constant acceleration i..
On a trip to Northern ontario, a car drives east for 2 hours at 100 km/h and then north for 8 hours at 100 km/h. What is the average velocity of the car for this trip
Fred (mass 63kg ) is running with the football at a speed of 5.8m/s when he is met head-on by Brutus (mass 130kg ), who is moving at 4.1m/s. How far do they slide
The speed of a bobsled is increasing because it has an accelerationof 2.4 m/s2. At a given instant in time, the forcesresisting the motion, including kinetic friction and airresistance, total 450N. The combined mass of the the ridersis 270kg
A .025 nm photon is incident on an electron. It is scatteredat an angle of 140o. What is the Kinetic engergy of the recoiling electron
A car battery has a rating of 230 ampere·hours (A·h). This rating is one indication of the total charge that the battery can provide to a circuit before failing.
q1. a vertical electric field of magnitude 3.00 104 nc exists above the earths surface on a day when a thunderstorm is
An atom has only two levels, a ground state with energy -25.0 eV, What wavelength photon is required for stimulated emission of an electron in the excited state
an electron traveling at 713 ms enters a 0.9 t magnetic field. the angle between the velocity and the field is 90o.
You have a great summer job working in a cancer research laboratory. Your team is trying to construct a gas laser that will give off light of an energy that will pass by the skin but be absorbed by cancer tissue.
If a capacitance meter applies a charge of 3.0 V across two plates and reads a capacitance of 30 pF, what is the charge on the plates
An inventor designs an ice boat that is propelled by pumping a jet of water directly out the rear in a direction parallel to the ice. What is the velocity of the ice boat when the water is gone
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