Physics

state types reflection of light
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6 If an object goes from 30 to 25 degrees Celcius, what is the change in Temperature?7How much energy is needed to heat 35 g of gold from 10 to 50 Degrees celcius?1294018060. 358Specific heat is. a
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A vertical spring with a force constant of 5.2N/m has a relaxed length of 2.58 m. Whena mass is attached to the end of the springand allowed to come to rest, the length of thespring is 3.50 m.Calculate the elastic potential energystored in the spring.
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A box is suspended by a rope. when a horizontal force of 100 n acts on the box, it moves to the side until the rope is at an angle of 20 degree with the vertical. the weight of the box is.
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How does the frequency of a string affect its wavelength?
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Ferris wheel has a diameter of 76 m and completed one revolution every 20 min. a)Calculate the tangential speed the carb) Calculate the magnitude to the centripetal acceleration of one of the car
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A kettle is made from metal. If the live wire inside this kettle were to come loose and touch the metal casing, you could get an __________ __________ if you then touched the kettle. What two words complete this sentence?
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1. Using a block-and-tackle, a mechanic pulls 8. 2 m of chain with a force of 90 N inorder to lift a 320 N motor to a height of 2. 9 m. a) What is the AMA( Actual mechanical advantage) 10 pointsb) What is the IMA (Ideal Mechanical Advantage) 10 pointsc. What is the efficiency of the block-and-tackle? (10 points)
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In a parallel circuit, the current amplitude is the same through the inductor branch, the capacitor branch, and the resisitor branch. For this circuit, L =20.0 mH and C = 10.0 mF.a.What is the source angular frequency?b.What is the resistance of the resistor?
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The length of speed's hand of watch is 1cm the change in velocity of is tip in 15 sec
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There are two major types of data storage: Hard copy (paper) and digital storage. Both have strengths and weaknesses. Which do you think is better and why?Your response should be 3-5 sentences long
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A. 149 kg baseball moving at 17. 7 m/s is caught by a 57 kg catcher at rest on an ice skating rink, wearingfrictionless skates. With what speed does the catcher slide on the ice?Do NOT put in units or it will be marked wrong! The answer's value only! Please round each answer to 3 places. MaVa + MbVb = (Ma+b)(Va+b)
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Determine the forces in all the members and state if these members are in tension or compression,use table to arrange your calculations (show the results on the truss)
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The force responsible for normal expiration is supplied by the:.
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A man pulled a food cart 4. 5 m to the right for 15 seconds. What is the average speed of the food cart to the nearest tenth of a m/s
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A 5.0 kg block and a 4.0 kg block are connected by a 0.6 kg rod. The links between the blocks and the rod are denoted by A and B. A force F is applied to the upper block.In Figure 4.2, the blocks and rod assembly move downward at constant velocity. The applied force F is closest to:a)88 Nb)90 Nc)92 Nd)94 Ne)96 N
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A boy of mass 60 kg and a girl of mass 40 kg are together and at rest on a frozen pond. What is the initial momentum of the girl?A. 100 kgm/sB. 40 kgm/sC. 10 kgm/sD. 0 kgm/s
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An engine is received that hunts and surges at top no-load speed only. to determine whether the carburetor or the governor system is causing the symptom, a specific troubleshooting process can be followed. technician a says that to separate the governor system from the carburetor, simply hold the throttle plate still and see if the engine continues to hunt & surge. technician b says that hunting and surging is caused exclusively by a lean mixture in the carburetor. which technician is correct? technician a technician b both technicians a and b neither technicians a nor b
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A 120-kg refrigerator that is 2. 0 m tall and 85 cm wide has its center of mass at its geometrical center. You are attempting to slide it along the floor by pushing horizontally on the side of the refrigerator. The coefficient of static friction between the floor and the refrigerator is 0. 30. Depending on where you push, the refrigerator may start to tip over before it starts to slide along the floor. What is the highest distance above the floor that you can push the refrigerator so that it will not tip before it begins to slide?.
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A plane monochromatic electromagnetic wave with wavelength =2. 0cm, propagates through a vacuum. Its magnetic field is described by >B =(Bxi^+Byj^)cos(kz+t), where Bx=1. 9106T,By=4. 7106T, and i^ and j^ are the unit vectors in the +x and +y directions, respectively. What is Sz, the z-component of the Poynting vector at (x=0,y=0,z=0) at t=0?
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The basics of _________ fusion in the Sun are detailed in the following important summary (i. E. , understand this material). Normally, protons repel each other because their charges are similar, and by analogy consider trying bring together the N of a magnet with the N of another magnet. To overcome that electromagnetic repulsion one needs to smash the protons at a very high speed, and then nuclear fusion can occur. That high speed is not achieved in daily life, thankfully, but in the cores of stars where the temperature is high. Temperature is a proxy for the speed of particles, and as an example consider if it is cold in the room the particles are moving slowly. The temperature is high in the cores of stars because there is the sizable mass of all the overlaying layers exerting a pressure on the core, and causing the temperature to rise, and hence the speed of the protons. By analogy, consider when diving from the top of the pool to the bottom of the pool, and where one begins to feel the pressure exerted by all the overlaying layers of water
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What is (fnet3)x , the x-component of the net force exerted by these two charges on a third charge q3 = 48.0 nc placed between q1 and q2 at x3 = -1.145 m ? your answer may be positive or negative, depending on the direction of the force.
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Which statements describe a closed circuit? select three options. bulbs will shine. bulbs will not shine. the circuit is incomplete. the circuit is complete. charges flow. charges do not flow.
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Terry is out with friends and sees a man who appears to be struggling with mental illness. He is ranting and waving his arms around in a very antagonistic way. He is getting more agitated and pulls out a knife and starts jabbing it like he is attacking someone. Should Terry call 9-1-1?
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