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Q. A hiker's trip consists of three segments. Path A is 8.0 km long heading 60 degrees north of east. Path B is 7.0 km long in a direction due east. Path C is 4.0 km long heading 315 degrees counter clockwise from east.
i. graphically add the hiker's displacements in the order A,B,C
ii. Graphically add the hiker's displacements in the order C,B,A
iii. What can you conclude about the resulting displacements?
Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 15.0 cm) 10.0 cm away from an object. Find the image distance and the magnification. explain the image that he observes.
Batman and Robin are attempting to escape that dastardly villain, the Joker, by hiding in a large pool of water (n=1.33). The Joker stands gloating at the edge of the pool.
Suppose a 61 kg boy and a 43 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
A 120 g trick baseball is thrown at 51 km/h. It explodes in flight into two pieces, with a 50 g piece regular straight ahead at 86 km/h. How much energy do the pieces gain in the explosion.
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An object-spring system oscillates with amplitude of 3.00cm. If the spring constant is 205 N/m and object has a mass of 0.50 kg, determine each of the following values.
The emissivity of her skin is 0.750 and its surface area is 1.30 m2. How much time would it take for her to emit a net radiant energy from her body that is equal to energy contained in this dessert.
An uncharged spherical conducting shell surrounds a point charge - q at its centre. Then a charge +3q is placed on the outside surface of shell.
An electron starts from rest 75.5 cm from a fixed point charge with Q = -0.150 µC. How fast will the electron be moving when it is too far away.
An iguana that is slowing down at a uniform rate of acceleration while moving in positive direction.
write down the equations expressing conservation of momentum for the components in the x and y directions separately.
What friction torque is required to reduce its angular speed from 80.0 to 51 in 27.
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