Physics

You have just lifted up a 10 lb weight by abducting your arm out to the side at your shoulder. You continue to hold the weight in that position for a few seconds. During this time the length of your muscle remains the same, while the muscle continues to vary the amount of tension or force needed to keep the weight from falling down. What type of contraction is going on while you are holding this weight in this position
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Electrons got ejected out as if they were ping pong balls by the light particle (photon). Electrons were not moving initially. Then, it was moving later because of the light. a. What is the momentum of the electron initially (p=mv) Hint: Is it moving initially? b. Does the electron have momentum after being hit by the light particle? Hint: is it moving after being hit? c. What can you infer about light particles in momentum? Hint: where is the electron getting its velocity from?
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The pressure in the cylinder of amotor cycle engine is 600000Pa. This acts on apiston with an area of o. Oo3m2. What is the force on the piston in newton?
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An airplane and a freight train have the same momentum. The airplane has a mass of 21,700 kg and is traveling at 1,200 km/h. The train has a mass of 9,600,000 kg. What is the speed of the train? Select one:A: 2. 7 km/h B:19. 0 km/hC:25. 0 km/hD: 5. 3 km/h
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apart from inital temperature and room temperature suggest any other factor that should be kept the same to ensure that similar temperature readings are obtained
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a guitar string of length 30 cm and stretched under a tension of 78 n has a certain fundamental frequency. how long would a pipe, open at both ends, need to be to play the same fundamental frequency? a 15-cm long piece of the guitar string has a mass of 0.4 g. the speed of sound in air is 340 m/s.
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Ocean waves are observed to travel along the water surface during a developing storm. A Coast Guard weather station observes that there is a vertical distance from high point to low point of 2.2 meters and a horizontal distance of 4 meters between adjacent crests. The waves splash into the station once every 4 seconds. Determine the frequency and the speed of these waves.Frequency= _________________________, speed = _______________________
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a car goes from 16 m/s to 2m/s in 3.5s. what is the cars acceleration
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You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in your mouth (where the temperature is 37.0 C) and the other end at the surface of your skin, at 30.0 C.How much heat input is needed to accomplish the lift?
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What is the current theory about the formation of the solar system?ResponsesAbout 14 billion years ago, several supernova events scattered all the known elements throughout the galaxy. The magnetic elements were attracted to each other and formed the early celestial bodies that eventually became the planets of the solar system.About 14 billion years ago, several supernova events scattered all the known elements throughout the galaxy. The magnetic elements were attracted to each other and formed the early celestial bodies that eventually became the planets of the solar system.A big bang occurred in the solar system as a result of a fusion reaction. All the matter in the solar system that had been clumped together was shattered and sent flying. As new pieces of matter connected, all the celestial bodies of the solar system were formed.A big bang occurred in the solar system as a result of a fusion reaction. All the matter in the solar system that had been clumped together was shattered and sent flying. As new pieces of matter connected, all the celestial bodies of the solar system were formed.The area of the universe that was to become the solar system went through a period of vast expansion as a result of rapid radioactive decay that left behind clouds of dust and gases. The excess clouds and gases were used to form the various parts of the solar system.The area of the universe that was to become the solar system went through a period of vast expansion as a result of rapid radioactive decay that left behind clouds of dust and gases. The excess clouds and gases were used to form the various parts of the solar system.The solar system began as a cloud of dust and gas that condensed, forming a bulging middle and an outer disk. The bulging middle of the cloud became the sun, and the rest of the dust and gas formed the planets, orbiting the sun in the same plane.
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It is best to say that efficient plumbing _______.
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There are good bacteria that live in our gut. they benefit from us because they feed on what we eat, and we benefit from them because they keep harmful bacteria away. in one or two sentences, define this relationship and describe what could happen if we took too many bacteria- killing antibotics without the advice of a physician.help please
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Artificial satellites are put into space for scientific research. The satellites are carried into space by rockets. (a) A rocket accelerates steadily from rest and reaches 8000 m/s after travelling 1680 000 m. Calculate the time, in minutes, it takes the rocket to reach this speed.
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What type of radioactive decay is this process? An example of? 14 6c 1417n +0 negative one negative plus the v
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Two charged spheres placed 43 cm apart exert a force of 1. 40 10-14 N oneach other. If one of the spheres has a charge of 1. 68 x 10-17 C, what is thecharge of the other sphere?
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what are the disadvantages of moving with the speed of light or even faster
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A ball is rolling along the ground. The instantaneous velocity at this moment is 4. 81 m/s and it has 788. 1J of kinetic energy. What is the mass of the ball?
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The maximum number of tension forces that can act on an object isa) there is no limitb) 2c) more than 2d) 1
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b) A rocket initially moving at v0=3.5 km/s in space fires its engines. The initial mass of rocket is m0=200,000 kg and the final mass of the rocket is m=20,000 kg. If the exhaust velocity is ve=5.2 km/s, calculate the final speed in km/s.
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A clown figurine is located 21.0 cm in front of a thin lens that has a focal length of 17.0 cm. Where would the image appear, and would it be real or virtual? 15.2 cm, virtual 89.3 cm, real 111 cm, real 65.2 cm, virtual
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A 0. 050kg metal bolt is heated to an unknown initial temperature. It is then dropped into a calorimeter containing 0. 15kg of water with an initial temperature of 21C. The bolt and the water then reach a final temperature of 25C. If the metal has a specific heat capcity of 899J/kgxC, find the initial temperature of the metal
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Find the induced voltage in the conductor of the Figure below where B = 0.04 ay TanU = 2.5 sin 103t az m/s.
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there are three identical lamps, a1, a2, and a3. in a circuit, a1 and a2 are connected in parallel, and a3 is connected in series to the parallel combination (a1 and a2). if lamp a1 turns off, what happens to the brightness of a2 and a3?
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Two charges are separated by 1. 68 cm. Object A has a charge of 5. 0 C , while object B has a charge of 7. 0 C. What is the force on Object A?
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