PHYSICS MIDDLE SCHOOL

If a turtle walks at a constant speed of 0.23 m/s, how long will it take to cover a distance of 65 meters?

Answers

Answer 1

Answer:

Time = (distance) / (speed)

Time = (65 meters) / (0.23 m /s)

Time = (65 / 0.23) sec

Time = 282.6 seconds ( that's 4 minutes 42.6 seconds)

Answer 2

Answer:

Final answer:

The time it would take a turtle moving with a speed of 0.23 m/s to cover a distance of 65 meters is approximately 282.61 seconds.

Explanation:

The subject of this question is physics, specifically the concept of speed, distance, and time. The formula that relates these three quantities is speed = distance/time.

In this case, we are asked to calculate the time it would take for a turtle moving with a constant speed to cover a certain distance. Here, the given speed (0.23 m/s) of the turtle and the distance it needs to cover (65 meters) are known.

By rearranging the formula to solve for time, we get time = distance / speed. Plugging in the values, we get time = 65 meters / 0.23 m/s. Doing the math gives approximately 282.61 seconds. Thus, it would take the turtle around 283 seconds to cover the distance of 65 meters at a speed of 0.23 m/s.

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How many times louder is a 70 dB sound than a 60 dB sound

Answers

Answer:

Half as loud as the seventy

Answer:

70 dB is twice as loud as 60 dB.

Explanation:

Most people perceive an increase of 10 dB as a doubling in volume of a sound.

Polaris, the North Star, is almost always visible in the same location because A) it is the brightest star in the sky. B) it is gravitationally attracted to our sun. C) it is the closest star to the earth, besides our sun. Eliminate D) the axis of the earth passes directly through the North Star.

Answers

The north end of the Earth's axis points almost exactly toward Polaris.
The only time when Polaris is not visible at the same place in the sky
at night is when that part of the sky is cloudy.

Answer D, The axis of the earth passes directly through the north star.

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What is the formula for volume using density and mass

Answers

The definition of density is

Density = (mass) / (volume)

Multiply each side by 'volume' : (density) x (volume) = (mass)

Divide each side by 'density' : Volume = (mass) / (density)

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Explain how we were able to boil water at room temperature

Answers

Answer:

put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating.

What are two ways in which the suns energy can be captured and used?

Answers

The oldest way ... the way we've been using as long as we've been
walking on the Earth ... has been to use plants. Plants sit out in the
sun all day, capturing its energy and using it to make chemical compounds.
Then we come along, cut the plants down, and eat them. Our bodies
rip the chemical compounds apart and suck the solar energy out of them,
and then we use the energy to walk around, sing, and play video games.

Another way to capture the sun's energy is to build a dam across a creek
or a river, so that the water can't flow past it. You see, it was the sun's
energy that evaporated the water from the ocean and lifted it high into
the sky, giving it a lot of potential energy. The rain falls on high ground,
up in the mountains, so the water still has most of that potential energy
as it drizzles down the river to the ocean. If we catch it on its way, we
can use some of that potential energy to turn wheels, grind our grain,
turn our hydroelectric turbines to get electrical energy ... all kinds of jobs.

A modern, recent new way to capture some of the sun's energy is to use
photovoltaic cells. Those are the flat blue things that you see on roofs
everywhere. When the sun shines on them, they convert some of its
energy into electrical energy. We use some of what they produce, and
we store the rest in giant batteries, to use when the sun is not there.

It can be used by giving you energy and buring calories

18. In an airplane flying at a constant speed, theforce pushing the airplane forward is exerted
by the engine and is equal to the opposite
force of air resistance. Describe how these
forces compare when the plane speeds up
and slows down. In which direction is the
net force on the airplane in each case?

Answers

Explanation:

In an airplane flying a constant speed, the force exerted by the engines pushing the plane forward is equal to the opposite force exerted by air resistance.

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