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Question1
1) Give an everyday instance that illustrates the difference between acceleration and velocity. Give a case of uniform and accelerated motion. 2) Why do people fault what is in diet energy drinks for actual energy? 3) Think about your energy intake today. Pick one food and identify chain of energy that led to it. What trophic level do you eat from most? Where will energy that you ingest eventually wind up? 4) List and give an instance of an object around you for of each of different types of chemical bonds
Question2
A biconcave lens made from glass with n=1.5. The radii of curvatures are 20cm and 10cm, and thickness is 5cm. An object of height 2cm is placed 8cm to left of surface of the lens
a) Solve this problem considering two refractions taking place at the air to glass after that glass to air boundaries. In other words, don’t use lens equations. Explain final image; location, nature (real/virtual), size, orientation (erect/inverted).
b) Answer part (a) by using a thin lens approximation. Match up to your results with the results found previously and comment.
A 4.0-mF capacitor initially charged to 50 V and a 6.0-mF capacitor charged to 30 V are connected to each other with the positive plate of each connected to the negative plate of the other
A mass is stretched 4 centimeters from the equilibrium position of a spring. If the displacement is doubled, what can be concluded about the restoring force? A. It is halved. B. It is doubled. C. It stays the same. D. It is increased by 4. E. It i..
A marble rolls down an incline of 30 degrees. If the marble is initally at rest at the top ofthe incline of length 2.0 meters what will the speed of the marble be at the bottom of the incline
A kicker's extended leg is swung for 0.4 seconds in a counterclockwise direction while accelerating at 200 deg/s2. What is the angular velocity of the leg
Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. The second is thrown downward, at a velocity of 12.0 m/s.
The flywheel in a car is a solid cylinder with a mass of 100 kg, a radius of 12 cm, and a length of 5.0 cm. What is the kinetic energy of the cylinder
A block of wood of mass 4.85 kg rests on a horizontal frictionless surface. find the velocity of the wood after the bullet has passed through
A 1200 kg car is traveling at 3.00 m/s and strikes a wall. The 1200 kg car bounces off the wall with a velocity of 4.00 m/s. then the average force on the car is
A person can't see objects clearly that are closer than 80 cm. What is the refractive power of the contact lenses wouyld you prescribe
A closed ended manometer is used to measure the pressure in a tank of gas. The working fluid for the manometer has a specific gravity of 1.47. what is the gauge pressure (in Pa) in the tank
A block of weight W = 13.5 N, which can slide without friction on a 27.5o incline, By how much will the spring be stretched
A horizontal wire of length 0.59 m, carrying a current of 8.1 A, is placed in a uniform external magnetic field. When the wire is horizontal, it experiences no magnetic force.
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