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Physics

Darwin Sheppard

A car travels at 40km/hr for 2 hours and at 55 km/hr for 2 hours. How far has the car traveled? What is its average velocity?

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Physics

Hailee Stein

The comparison of work output to work input is called the mechanical. advantage ... a. true. b. false

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Physics

Catherine Vega

Bob, Jill, Kim, and Steve measure an object's length, density, mass, and brightness, respectively. Which student must derive a unit of measurement?

A. Bob

B. Jill

C. Kim

D. Steve

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Physics

Alfredo

Scientist have changed the model of the atom. what experimental evidence led them to change from the previous model.

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Physics

Jadon Hays

A 20 kg mass with an initial velocity of 10 m/s slides to a stop in 2 meters. What is the net work down on the mass? a.) 250 J b.) 500 J c.) 120 J d.) 20 J e.) None of the above

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Physics

Gideon Yu

When traveling in a car and turning it the right which way does your body go and why

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Physics

Sherlyn Wells

A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. What is the new pressure when the temperature is changed to 336 K and the volume is decreased to 450. milliliters?

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Physics

Mendoza

Which type of sensor uses a burn-off circuit

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Physics

Soren Navarro

Jack drops a tennis ball from the top of a skyscraper allowing it to fall freely. Neglecting air resistance, what is the velocity of the tennis ball at the end of 5 seconds?

A.) 9.81m/s^2

B.) 49.0m/s^2

C.) 29.4m/s^2

D.) 88.7m/s^2

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Physics

Helena Andrade

At one end of a production line, Isaac puts peaches into cans on a conveyor belt. He fills 18 cans per minute. As soon as Isaac has filled 670 cans on the conveyor belt, Albert starts putting lids on the cans at the other end of the production line. As Albert finishes closing each can, he moves up along side the conveyor belt to meet the next can. Albert puts lids on 50 cans per minute. (Assume that the conveyor belt initially had no cans on it, and that Isaac stays in place as he continues to fill cans.) How long does it take for Albert to reach Isaac (measured from when Albert starts putting on lids) ?

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Physics

Janelle Steele

Identify the triangular-shaped depositional feature indicated by letter c

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Physics

Kendra Rowe

Newton concluded that some force had to act on the moon because

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Physics

Zachery

Redacteza o compunere in care sa prezinti o modalitate placuta de petrecere a vacantei de vara

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Physics

Amira

The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the upthrust force. The hot-air balloon descends vertically at constant speed. The force of air resistance on the balloon is F. Which weight of material must be released from the balloon so that it ascends vertically at the same constant speed? A F B 2F C 3F D 4F

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Physics

Nico Mckay

Which are vascular plants. A. fern B. hornworts. C. liverworts D. mosses

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