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A coin is dropped from the top of a tall building. determine the coin’s (a) velocity and (b) displacement after 1.5 sec.

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What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent? A.combustion B.decomposition C.single replacement D.synthesis

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Which answer accurately describes the difference between speed and velocity? Question 8 options: A. Speed can be constant or it can change. Velocity is always constant. B. Speed requires direction. Direction doesn’t matter when calculating velocity. C. Speed is the distance per unit of time. Velocity is the displacement per unit of time. D. Speed is the same as average velocity. Velocity is used to calculate acceleration.

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What is the DISPLACEMENT of the motorbike rider in the picture? 120m 200m 80m

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In which situation is no work considered to be done by a force? A. when the angle is between the force and displacement is 180 B. when the angle is between the force and displacement is 90 C. when the angle is between the force and displacement is 45 D. when the angle is between the force and displacement is 0

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Three equal negative point charges are placed at three of the corners of a square of side d. What is the magnitude of the net electric field at the center of the square? (k=1/4πϵ0=8.99×109N⋅m2/C2 ) Express your answer in terms of the variables d, q, and appropriate constants.

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THE BENDSA. is an exercise that astronauts doB. is a painful condition C. are places in a space suit that are most flexible D. none of the above

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Which quantity is a vector quantity? displacement distance mass temperature volume

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Displacement verctors of 1km south, 3km north, 6 km south, and 2 km north combine to a total displacement of

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According to the big bang theory, the universe was once a very and hostile place. a.cold b.restless c.hot

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Two particles are executing simple harmonic motion with same amplitude and frequency about the same equilibrium position. They pass each other moving in opposite direction, each time their displacement is half their amplitude. What is the difference between their phase constants?

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Simone created a chart to summarize the energy transformations that take place when energy from the wind is used to generate electricity. Which best completes the chart? nuclear energy transformed to electrical energy chemical energy transformed to electrical energy radiant energy transformed to mechanical energy kinetic energy transformed to mechanical energy

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A boat travels in a straight path that is 25° west of north. Which describes the values of the west and north components of the boat’s displacement?

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All of the following describe climate except it is hot today the average temperature of a place the average precipitation of a place the average number of sunny days of a place

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A place that is warm year round and near the equator would most likely have what type of climate? Mild climate Continental climate Mountain area Tropical climate

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There is a 200n boulder stuck in ur yard. You want to use 2 meter long lever to pry it loose from the ground. If you are able to generate 50n of force to the other end of the lever, where should the fulcrum be placed? How far from the boulder? How far from u?

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15 g of lead (specific heat = 0.128 J/g Celsius) at 120 Degrees Celsius is placed on a glacier of ice at 0 degrees Celsius. How much ice melts? (Lf of ice = 333 J/g)

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Two campers pull a canoe. If the force of friction acting on the canoe is 84 N, then how much work does the two campers need to do to keep the canoe in the middle of the river for a displacement of 50 m?

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A 0.5 kg air-track car is attached to the end of a horizontal spring of constant k = 20 N/m. The car is displaced 15 cm from its equilibrium point and released. a) What is the car’s maximum speed? b) What is the car’s maximum acceleration? c) What is the frequency f of the car’s oscillation? I need help please. What equations should I use for each problems?

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A 0.5 kg air-track car is attached to the end of a horizontal spring of constant k = 20 N/m. The car is displaced 15 cm from its equilibrium point and released. a) What is the car’s maximum speed? b) What is the car’s maximum acceleration? c) What is the frequency f of the car’s oscillation? I need help please! Do it step by step and then substitute the numbers into that equation

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What is a wave that has all the crests and troughs in the same place at the same time? coherent wave wavelength fiber optic wave hologram

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What would indicate that a physical change takes place when copper is drawn into wire?

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When an electric current passes through water, _____ takes place, breaking down the compound into hydrogen and oxygen.?

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Which one of the following scenarios accurately describes a condition in which resonance can occur?End of exam A. A person is holding a tuning fork on one end of a football field and another person is holding a separate tuning fork on the opposite end of the field. B. A pipe’s length is equal to 1∕2 of the wavelength of the sound waves produced by a tuning fork vibrating over one end of the pipe that’s open to the air at both ends.C. A vibrating tuning fork is struck and begins to vibrate as the object used to strike it is placed away from the tuning fork. D. A column of air has a height equal to 1∕8 of the wavelength of the sound waves produced by a tuning fork vibrating over the column of air in an open pipe that’s partially immersed in water.

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An unknown force is applied to a 12 kg. The force acts at an angle of 30 degrees above the horizontal. Determine the force acting if the force acts for a horizontal displacement of 22 meters and increases the 12 kg mass’s speed from 11 m/s to 26 m/s

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What happens to an iron bar when it is placed within the coils of a solenoid

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Some animals can replace lost parts by growing new ones? true or false

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An elastic band is hung on a hook and a mass is hung on the lower end of the band. When the mass is pulled downward and then released, it vibrates vertically. The equation of motion is s = 8 cos t + 9 sin t, t ≥ 0, where s is measured in centimeters and t in seconds. (Take the positive direction to be downward.) 1) How far from its equilibrium position does the mass travel? (Round your answer to two decimal places.)

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As an object moves along the x axis, many measurements are made of its position, enough to generate a smooth, accurate graph of x versus t. Which of the following quantities for the object cannot be obtained from this graph alone? (Select all that apply.) the displacement during some time interval the speed at any instant the velocity at any instant the average velocity during some time interval the acceleration at any instant

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A roast turkey is taken from an oven when its temperature has reached 185°F and is placed on a table in a room where the temperature is 75°F. The graph shows how the temperature of the turkey decreases and eventually approaches room temperature. By measuring the slope of the tangent, estimate the rate of change of the temperature after an hour.

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