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A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 91 cm from the center of the mirror, and its image is found 23 cm from the mirror.
Find the focal length of the mirror.
What is the radius of curvature of the mirror?
What is the magnification of the pencil's image?
A child is riding a merry-go-round which completes a revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. Evalute the magnitude of the centripetal acceleration of the child?
A charge of -2.05 nC and a charge of -6.20 nC are separated by a distance of 70.0 cm. Find the position at which a third charge of +7.20 nC can be positioned ( from the -2.05 nC charge) so that net electrostatic force on it is zero.
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
A 3.18-nF parallel-plate capacitor is charged to an initial potential difference ?Vi = 100 V and is then isolated. How much work is required to withdraw the porcelain sheet
How far away is the Milky Way from our nearest neighbour, Andromeda Galaxy, if Andromeda contains roughly the similar number of stars and attracts the Milky Way with a gravitational force of 2.4 x 10^30 N.
the earth completes a circular orbit around the sun in one year. the orbit has a radius of 93,000,000 miles. what is the speed of the earth around the sun in m/s? Report your result using scientific notation.
The space shuttle typically orbits 400 km above the earth's surface. The earth has a mass of 5.98 × 1024 kg, Use your knowledge of gravitation to determine the orbital speed of the shuttle's cargo
Differentiate between the following three types of plain carbon steels.
An equilateral triangle has sides of lengthL. Charges of +Q,-2Q,and +3Q are placed at the vertices. Find the electric field midway between the two positive charges
A 17-kg projectile is fired at an angle of 60° above the horizontal and with a speed of 240 m/s. At the highest point of its trajectory the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial spe..
In open heart surgery a much smaller amount of energy will defibrillate the heart. Find the amount of stored charge
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm, what force is exerted by the biceps muscle
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