Physics

A fly accumulates 3.0 x 10-10 c of positive charge as it flies through the air. what is themagnitude and direction of the electric field at a location 2.0 cm away from the fly?
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In the arrangement of the first figure, we gradually pull the block from x = 0 to x = +3. 0 cm, where it is stationary. The second figure gives the work that our force does on the block. The scale of the figure's vertical axis is set by Ws = 1. 0 J. We then pull the block out to x = +5. 0 cm and release it from rest. How much work does the spring do on the block when the block moves from xi = +5. 0 cm to (a) x = +3. 0 cm, (b) x = -1. 0 cm, and (c) x = -5. 0 cm?
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Object A is traveling at half the speed of light colliding with object B that is stationary. How does object A experience time in comparison to object B and how does object B experience time in comparison to object A before there collision?
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Which step of the PRICES method is represented by the letter S? A. Raise the injured area above the heart. B. Stop the activity until the injury is evaluated. C. Wrap the injured site to decrease swelling. D. Apply a brace or a splint to the area.
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A rocket is fired from the earth to the moon at a speed of 0.930c. Let two events be "rocket leaves earth" and "rocket hits moon"A. In the earth's reference frame, calculate x for these events.B. In the earth's reference frame, calculate t for these events.C. In the earth's reference frame, calculate the spacetime interval s for these events.D. In the earth's reference frame, calculate x' for these events.E. In the earth's reference frame, calculate t' for these events.F. In the earth's reference frame, calculate the spacetime interval s' for these events.G. In the earth's reference frame, calculate x if a rocket is replaced with a laser beam.H. In the earth's reference frame, calculate t if a rocket is replaced with a laser beam.I. In the earth's reference frame, calculate the spacetime interval s if a rocket is replaced with a laser beam.Express ALL parts with appropriate units
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Instruction: Answer all questions Time: 1. 5hrs An electron is placed in a uniform electric field with field strength of 150kvm Calculate the duration for it to travel 30mm from its stationary Position Give an explanation for your answer.
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Estimate the lowest possible kinetic energy of a neutron contained in a typical nucleus of radius 1. 21015m. Use the radius as the uncertainty in position for the neutron. [Hint: Assume a particle can have a kinetic energy as large as its uncertainty. ]
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Identify what is being described in each sentence
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Vocabulary: electron volt, frequency, photoelectric effect, photon, photon flux, voltage, wavelength, work function Prior Knowledge Questions (Do these BEFORE using the Gizmo. ) 1. Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen? 2. Suppose you rolled a lot of ping pong balls at the bowling pins. Do you think that would change the results of your experiment? Explain. Gizmo Warm-up The photoelectric effect occurs when tiny packets of light, called photons, knock electrons away from a metal surface. Only photons with enough energy are able to dislodge electrons. In the Photoelectric Effect Gizmo, check that the Wavelength is 500 nm, the Photon flux is 5 /ms, the Voltage is 0. 0 volts, and Potassium is selected. Click Flash the light to send photons of light (green arrows) toward a metal plate encased in a vacuum tube. 1. The blue dots on the metal plate are electrons. What happens when the photons hit the electrons? 2. What happens when the electrons reach the light bulb? _________________________________________________________________________ When electrons reach the light bulb they complete a circuit, causing the bulb to glow briefly
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A beam of light travels into a new denser medium causing the speed of light to change to 2. 5 x 10 8 m/s. What is the index of refraction for the new medium?
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4.Large speaker cones produce deeper frequencies than small speaker cones.O TrueMacBook AirFalse
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Using what you learned from this lab describe how you receive colors from the various object observed in our world. discuss how we receive colors from objects to omit light such as tvs, objects i dont emit light such as colored paper, and how filters on our eyes work such as sunglasses. keywords: phototons, wavelength, and colors that just red, green, and blue.
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from time 15 seconds to 32 s the path of a car is part of a circle. For this motion the state the direction of the resultant force on the car and what happens to the velocity of the car
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To cause sunburn on human skin by breaking a chemical bond within a skin cell, a photon with about3.5 eV of energy is required. What is the required wavelength?What is the wavelength?
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Scenario: You place a cold metal sphere in a container of hot water. (a) Type(s) of energy transfer:(b) Where will each form of transfer occur?(c) What will happen and why?4. Scenario: You place a piece of hot rock into a metal container, and then remove all theair from the container. (a) Type(s) of energy transfer:(b) Where will each form of transfer occur?(c) What will happen and why?
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A gasoline engine takes in 1. 61 10 J of heat and delivers 3700 J of work per cycle. The heat is obtained by burning gasoline with a heat of combustion of 4. 60 10 J/g. (a) What is the thermal efficiency? (b) How much heat is discarded in each cycle? (c) What mass of fuel is burned in each cycle? (d) If the engine goes through 60. 0 cycles per second, what is its power output in kilowatts? In horsepower?
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During an ultrasound, sound waves are sent by a transducer through muscle tissue at a speed of 1,300 m/s. Some of the sound waves are reflected from a metal fragment 5.0 cm into the muscle tissue. How long did it take the transducer to detect the reflected waves from the metal fragment after they were first emitted? 0.26 seconds 39 seconds 4.6 E5 seconds 7.7E5 seconds
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Waves in a lake are 5 meters in length and pass an anchored boat 2 seconds apart. What is the speed of the waves?
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Deployment Worksheet 2b - Work 1. A 1400 N force is applied parallel to a horizontal surface. It pushes an 80 kg box 2 m across the surface. What work is done
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A small block with mass 0.0400 kg is moving in the xy-plane. The net force on the block is described by the potential-energy function U(x,y)=(5.50J/m2)x2(3.70J/m3)y3.Part AWhat is the magnitude of the acceleration of the block when it is at the point x = 0.40 m , y = 0.50 m ?Express your answer with the appropriate units.Part BWhat is the direction of the acceleration of the block when it is at the point x = 0.40 m , y = 0.50 m ?Express your answer in degrees.
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5. The planet Mars has a mass about one-tenth the mass of Earth. Even though Mars has two moons, their tidal forces have a much weaker effect on Mars than Earth's moon does on Earth. Why do you think this is ? Use the data in the tables to support your prediction
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Maintenance of military defense and the national parks system that must be renewed every year falls under which type of government spending
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A shell that is initially at rest explodes into two fragments, one fragment 25 times heavier than the other. If any gas from the explosion has negligible mass, then:.
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two similar razor blades were placed on a wooden block and the other on an iron block. it was observed that the razor blade on the wooden block is attracted by the magnet while that on the iron block was not. explain
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