Physics

1) For the diagram below, you are looking down from above at a puck sliding on a frictionlesstabletop. The puck is sliding at a constant speed along a circular fence and just leavescontact with the fence at position B. The fence and puck are also frictionless.BBa) On the top drawing draw vectors and label themforany forces acting parallel to the table top onthe puck at positions A and B.b) On the side views below, draw vectors and labelthem for any forces acting perpendicular to thetabletop.side view at Aside view at Bc) Which of the forces above are inward forces?d) Which of the forces above are outward forces?e) What would be the equation for the net force onthe puck?f) On the top drawing at position B draw a line at leastan inch long showing the path the puck will travelafter point B. How do you know?g) On the bottom drawing, draw and label a velocityand an acceleration vector on the puck at positionsA and B.h) At position A is the net force on the puck zero?How do you know?i) At position B is the net force on the puck zero?How do you know?
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x < If a heater is used for 2 hours and an electric motor for 4 hours, they consume 25 kJ of energy. If the heater is used for 3 hours and the electric motor for 2 hours, they consume 18 kJ of energy. Calculate the energy consumption per hour of the heater and of the electric motor
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The cord from an appliance is too short to reach the wall outlet in your room. You have two extension cords to choose from. (a) Find the voltage drop in the first extension cord having a 0.0760 ? resistance and through which 5.60 A is flowing. V (b) The second extension cord is cheaper and utilizes thinner wire. It has a resistance of 0.760 ? and the current flowing through it is 5.60 A. By what amount does the voltage supplied to the appliance change when the first extension cord is replaced by the second?
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(1) a father racing his son has 1/4 the kinetic energy of the son, who has 1/2 the mass of the father. the father speeds up by 1.7 m/s and then has the same kinetic energy as the son. what are the original speeds of (a) the father and (b) the son?
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an object moves around a circular path at a constant speed and makes ten complete revolutions in 5 seconds. what is the frequency of rotation?
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calculate the speed of the second ship with respect to earth if it is fired in the same direction the first spaceship is already moving.
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a .1 kg ball traveling 20 m/s is caught by a catcher. in stopping the ball, the mitt recoils for .01 second. the average force applied to the ball is
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air is compressed in a piston-cylinder device from 5 m3 to 3 m3 at a constant pressure of 1000 kpa. determine the amount of boundary work for the process.
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gravitational potential energy when potential energy0.25 kg ball is suspended from a light spring.find gravitaional potential energy.g
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what wavelength em radiation would be emitted most strongly by matter at the temperature of the core of a nuclear explosion, about 10,000,000 k?
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what is the spring constant of a spring that is compressed 5.0 cm and has 0.325 j of elastic potential energy stored in it?
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10. The energy states of an electron in a hydrogen atom is given by:=13.62En= n 213.6 eVWhich of the following is not a possible energy of an emitted photon of the atom for an electron that is initially at =4n=4?0.66 eV1.89 eV2.55 eV12.8 eV
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your car is accelerating to the right from a stop.for the steps and strategies involved in solving a similar problem, you may view a
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discuss how errors due to earth curvature and refraction can be eliminated from the differential leveling process.
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What causes an object to become electrically charged?
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As shown in the figure, a light inextensible string is passing around a smooth light pulley and it is attached to a spring having spring constant K. When a mass is suspended to the pulley, the pulley moved downwards through a distance of x and attained equilibrium. The mass attached to the pulley is given by : 1) Kx/g2) 2Kx/g3) 3Kx/g4) 4Kx/g5) 5Kx/gPlease show me how you worked it out, along with a brief explanation.
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a 170-hz sound travels through pure helium. the wavelength of the sound is measured to be 5.92 m. what is the speed of sound in helium?
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How could you use the game of baseball to explain the difference betweeninertia and momentum?
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dry air will break down and generate a spark if the electric field exceeds about 2.85e 6 n/c. how much charge could be packed onto a green pea (diameter 0.620 cm) before the pea spontaneously discharges?
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mass than air) at the same temperature. how does this affect the normal-mode frequencies of the pipe?
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The voltage of a battery is V and the current is I. If the voltage is doubled to 2V, what is the new current?O 1/4O 21O 1/2041
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what is the longest possible wavelength for the traveling waves that can interfere to form a standing wave on this string?
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suppose you want to connect a capacitor to a single 10.0-v battery. 1) what capacitance do you need to store 12.0 c of charge? (express your answer to three significant figures.)
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a pulley wheel is 77 mm diameter and transmits 1 kw of power at 373 rev/min. the maximum belt tension is 1,116 n at this point. calculate the initial tension applied to the stationary belts.
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