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Three equal positive charges Q are each fixed at a corner of an equiliateral triangle of side length a. A negative charge -Q is placed at the midpoint of one of the sides.
(a) Draw a free body diagram for the negative charge. Find the magnitudes of the net force on the negative charge.
(b) Find the magnitudes of the net electric field at the triangle's center. Draw a diagram showing the individual electric field vectors due to each charge at the triangle's center.
The position of a cart that is oscillating on a spring is given by the equation x= 12.3 cm cos [(1.26 s-1)t] . When t= .805s , what are the (a) velocity and (b) acceleration of the cart ?
A 0.570 kg ball is dropped from rest at a point 1.50 m above the floor. The ball rebounds straight upward to a height of 0.800 m. Illustrate what are the magnitude and direction of the impulse of the net force applied to the ball during the collis..
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Classically, the electron cannot pass through the barrier because E
Compute the force that acts on a square access hatch at the bottom of the tank that measures 0.25m by 0.25m.
Calculate the y-component of the magnetic force.
While running, a person dissipates about 0.524 J of mechanical energy per step per kilogram of body mass. If a 65.5 kg person dissipates a power of 76.6 W during a race, explain how fast is the person running?
A car starts from rest and travels for 10s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform negative acceleration of -2.0 m/s2.
The pilot of an airplane traveling 180 km/h wants to drop supplies to flood victims isolated on a patch of land 150 m below. The supplies should be dropped explain how many seconds before the plane is directly overhead?
You drop a stone into a deep well and hear it hit the bottom 1.80 s later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound of the stone hitting the bottom to reach you. Sound travels ..
What is the size of the gravitational force that the Earth exerts on the Moon.
Make a 10 to12 slide powerpoint presentation on behaviourism and social-learning theory. Include speaker notes and graphics, limit text to fie lines, and use approximately five words per bulleted item.
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