Physics

When 525 J of heat is added to 7.6 g of metal at 26C, the temperature increases to 80C. What is the specific heat of the metal?
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What is the velocity of a 65 kg runner with 90 kg m/s of momentum.
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Which of the following is NOT true about noon in the Northern Hemisphere, on January 1? A. The sun has reached its highest altitude for that day. B. Your shadow is the shortest it will be that day. C. Your shadow points due north. D. The Sun is directly overhead.
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a bag of sugar has a mass of 2.26 kg. what is its weight
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HELP 30 POINTSThe picture above shows a cross section of the Earths interior including both oceanic crust and continental crust. Along the seafloor, there are midocean ridges where magma rises to the surface and creates new crust. There are also areas where crust is recycled as oceanic crust goes below continental crust. What type of boundary would occur at a mid-ocean ridge?
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A uniform plank of mass 10kg and length 10m rests on two supports, A and B as shown. A boy of weight 500N stands at a distance of 2m from A. Find the reaction forces U and U at the supports A and B respectively
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A student constructs four electric circuits.Each circuit includes two bulbs and an ammeter.All the bulbs, all the cells and all the ammeters are identical.The ammeter readings for the first two circuits are shown.Use values from the box to complete the ammeter readings for the other two circuits.
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You need to load a crate of mass m onto the bed of a truckon earth. One possibility is just to lift the crate straight up over a height h, equal to height of the truck's bed. Theforce exert in this case is F1 and the work done in this case is W1. The other possibility is to slide the crate up the frictionless ramp of length L.. In this case you exert force F2 and perform work W2. Which statement is true?a. F1 > F2 and W1 > W2b. F1 = F2 and W1 > W2c. F1 = F2 and W1 = W2d. F1 > F2 and W1< W2e. F1 > F2 and W1 = W2
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A toy car of mass 2.0kg is made to move in a circular track of radius 10.0m. If the centripetal force is 800.0N, calculate the angular velocity of the car
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What are examples of convection currents?The movement of warm air into cooler air and cooler air into warm air.The movement of cool water into warmer water and warmer water into the cool water.The displacement of air/water molecules by other air/water molecules due to varying temperatures.All of the above.
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Why is the magnetic force considered to be an action datance forceA Magnets in de bo exert a forceB. Magnets do not have to touch each other to experience a force.C. Magnets push each other apan to increase the distance between them.D Magnets mast be large in sire in onder to eden a force that is strong enough to notice
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Chemical energy may be released during a chemical reaction in the form of heat ..... True or false?
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PLEASE HELP ASAP!!!!!!!1
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A projectile only accelerates in which direction?
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What are examples of changes in people, animals, or objects that would help you make a claim about their age? NO LINKS OR YOURE GETTING REPORTED. ThanksIts Earth Science
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does altitude has an effect on weight? HELP
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Which colour of light in a prism has theshortest wavelength? Explainyour answer.( 38 points )
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what is an axis in social
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A wheel has an angular speed of 32 rev/s when it experiences a constant angular acceleration of 65 rev/s2 which causes it to spin FASTER. During this time the wheel completes 92 rev. Determine how long the wheel was experiencing this angular acceleration and how fast the wheel was spinning at the end of this period. Assume that the wheel doesn't change the direction of its spin.
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A sphere with the same mass and radius as the original cylinder, but a smaller rotational inertia, is released from rest from the top of the ramp. KS and KC are the sphere's and cylinder's total kinetic energy at the bottom of the ramp, respectively. How do KS and KC compare, and why
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PHYSICS HELPPLEASE HELP ITS ABOUT ATWOOD MACHINES
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A car increases from 15 km/s to 45 km/s in 5 seconds. Calculate the average acceleration of the car during these 5 seconds. (2 points) A. 6 km/s2 B. 12 km/s2 C. 30 km/s2 D. 60 km/s2
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A 100-watt lightbulb uses 1 kilowatt-hour of electricalenergy when it is on for ten hours. How much energy doesa 25-watt lightbulb use when it is on for ten hours?
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