When the speed of the bottle is 2m/s

Answers

Answer 1

Answer: K=1/2 mv^2
K=1/2(0.250)(2)^2=0.5j
M=0.250kg

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Which change increases the electric force between objects? A) Two neutral objects are moved closer together. B) Electrons are added to two negatively charged objects. C) Two oppositely charged objects are moved farther apart. D) The charge on two positively charged objects is reduced.
Which statements accurately describe matter
When this current is closed which way does the current flow
Use newton's first law of motion to explain why you feel tossed around whenever a roller coaster goes over a hill or through a loop.
People in the United States know that water boils at 212°F. In Europe,people know that water boils at 100°C. Is the water in the U.S. differentthan the water in Europe? What explains the two different temperatures?

What is a scientific paradigm

Answers

a scientific paradigm is is a distinct set of concepts or thought patterns, including theories, research methods, postulates, and standards for what constitutes legitimate contributions to a field.

What is the difference between electric field and electrostatic field?

Answers

Semantically? An electric field does not have to be static while in electrostatics it's generally assumed that the electric field does not change or only changes so slowly that its rate of change doesn't matter. That's very different in electrodynamics where electric and magnetic field changes are always coupled.

The main difference is that Electrostatic field is because of a stationary charge. And Induced field is because of a changing magneticfield. Since magnetic field and electric field are the same thing in different frames of reference.

Which of the following statements are true as a block of ice melts?The temperature of the ice/water system increases.
Heat energy enters the ice/water system.
The temperature of the ice/water system remains constant.Heat energy leaves the ice/water system.
The temperature of the ice/water system decreases.

Answers

It takes heat energy to turn ice at 0°C into water at 0°C.

-- You start off with a block of ice.

-- Some heat energy hits the ice, the ice absorbs it, a little bit
of ice melts, and a puddle forms around it. Now you have an
ice/water system, all at 0°C.

-- If no more heat comes in from somewhere, then no more
ice can melt.

-- When some more heat energy comes in, some more ice
can melt, and become liquid at 0°C.

-- As heat comes in, more and more ice melts. The temperature
of the whole system remains constant. Any heat that comes in
is used to change the state of some ice from solid to liquid, with
no temperature change.

-- Finally, when all of the solid is gone, any more heat energy
begins to raise the temperature of the water.

According to the theory of plate tectonics, which forces cause the movement of plates in the earth's crust? A. Magnetism and Solar Radiation
B. Earthquakes and Volcanic Eruptions
C. Convection and The Moons Gravitational Pull
D. Convection and Gravity

Answers

Your answer is C. Because Heat from the earth's interior that fuels convection currents which moves the crustal plates on the earth's surface.

The correct answer is B.

1. I drop a penny from the top of the tower at the front of Fort Collins High School and it takes 1.85 seconds to hit the ground. Calculate the velocity in m/s after 1.10 seconds of freefall and calculate the velocity at impact in mi/hr.

Answers

The acceleration of gravity on Earth is 9.8 m/s² .
The speed of a falling object keeps increasing smoothly,
in such a way that the speed is always 9.8 m/s faster than
it was one second earlier.

If you 'drop' the penny, then it starts out with zero speed.
If you also start the clock at the same instant, then

   After 1.10 sec, Speed = (1.10 x 9.8) = 10.78 meters/sec

   After 1.85 sec, Speed = (1.85 x 9.8) = 18.13 meters/sec

But you want this second one given in a different unit of speed.
OK then:

   = (18.13 meter/sec) x (3,600 sec/hr) x (1 mile/1609.344 meter)

   = (18.13 x 3,600 / 1609.344) (mile/hr) = 40.56 mph (rounded)

We did notice that in an apparent effort to make the question
sound more erudite and sophisticated, you decided to phrase
it in terms of 'velocity'. We can answer it in those terms, if we
ASSUME that there is no wind, and the penny therefore doesn't
acquire any horizontal component of motion on its way down.

With that assumption in force, we are able to state unequivocally
and without fear of contradiction that each 'speed' described above ...
with the word 'downward' appended to it ... does become a 'velocity'.

What’s the efficiency of a car that uses 400,000 J of energy from gasoline to make 48,000 J of kineticenergy?

Answers

To calculate efficiency you should divide output by input energy.

The engine produces 48000 j energy from 400000 j given energy from gasoline.

48 000/400 000 = 48/400 = 12/100 = 12%

Efficiency of this engine is 12%

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A student releases a block of mass m at the top of a slide of height h1. the block moves down the slide and off the end of the table of height h2, landing on the floor a horizontal distance d from the edge of the table. Friction and air resistance are negligible. The overall height H of the setup is determined by the height of the room. Therefore, if h1 is increased, h2 must decrease by the same amount so that the sum h1+h2 remains equal to H. The student wants to adjust h1 and h2 to make d as large as possible.A) 1) Without using equations, explain why making h1 very small would cause d to be small, even though h2 would be very large?2) Without using equations, explain why making h2 very small would cause d to be small, even thoughh1 would be largeB) Derive an equation for d in terms of h1, h2, m, and physical constants as appropriate.

Eric traveled east for 150 miles in 2 hours. Then he went west for 40 miles in 1 hour. What is the average velocity?