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3 years ago

Which is the SI base unit for distance?

Physics

1 answer:

stealth61 [152]3 years ago

7 0

Yes you're correct. For distance, SI is based on meters.

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A ball of mass 0.35 kg hangs straight down on a string of length 13 cm. It is then swung upward, keeping the string taut, until

Anni [7]

Answer:

PE=0.29J

Explanation:

According to the description, there is a angle and in point swung upward of 70°

So,

$Y=13*10^{-2}*cos(70) \\Y=0.0444m$

Appling the equation of Potential Energy we have,

$PE=mgh\\PE=(0.35)(9.8)(0.13-0.0444)\\PE=0.29J$

6 0

3 years ago

How much heat is needed to raise the temperature of 6g of water by 18oC?

marysya [2.9K]

The answer would be 22.50cal

3 0

3 years ago

Which two factors determine the arhount of work done?

Scilla [17]

<h2>Answer:distance and force</h2>

Explanation:

Let $W$ be the work done.

Let $F$ be the force applied.

Let $S$ be the displacement of the object.

Workdone by a object is defined as the dot product of force and displacement.

$W=F.S$

Since distance is the magnitude of displacement when force and displacement are in a same direction,

$|W|=|F|\times distance$

So,work done depends on force applied and distance.

8 0

3 years ago

Read 2 more answers

A recognized means of inquiry to provide scientific answers to questions is_____

Alex17521 [72]

<span>A recognized means of inquiry to provide scientific answers to questions is scientific method. It is the only way a person can reach a scientific conclusion to any question. Without scientific proof it cannot be said to be true. I hope that this is the answer that you were looking for and the answer has helped you.</span>

6 0

3 years ago

A soccer coach riding his bike reaches his office in xx hours. If he travels at 24 km/h, he reaches his office 5 minutes late. I

Elina [12.6K]

Answer:

18 km

Explanation:

Let 'd' be the distance between his house and office.

Normal time taken to reach the office = 'x' hours.

If speed is 24 km/h, time is increased by 5 minutes.

If speed is 30 km/h, time is reduced by 4 minutes.

We know that,

Time taken = Distance traveled ÷ Speed

So, when speed is 24 km/hr, time is increased by 5 minutes.

$1\ min = \frac{1}{60}\ h\\5\ min =\frac{5}{60}=\frac{1}{12}\ h$

So, time is $x+\frac{1}{12}$

Therefore,

$x+\frac{1}{12}=\frac{d}{24}\\\\x=\frac{d}{24}-\frac{1}{12}\\\\x=\frac{1}{12}(\frac{d}{2}-1)---------1$

Now, when speed is 30 km/h, time is reduced by 4 minutes or $\frac{4}{60}=\frac{1}{15}\ hours$

So, time now is $x-\frac{1}{15}$

Again using the time formula, we have

$x-\frac{1}{15}=\frac{d}{30}\\\\x=\frac{d}{30}+\frac{1}{15}\\\\x=\frac{1}{15}(\frac{d}{2}+1)-------------2$

Equations (1) and (2) are equal. So,

$\frac{1}{12}(\frac{d}{2}-1)=\frac{1}{15}(\frac{d}{2}+1)\\\\\frac{15}{12}(\frac{d}{2}-1)=\frac{d}{2}+1\\\\\frac{5d}{8}-\frac{5}{4}=\frac{d}{2}+1\\\\\frac{5d}{8}-\frac{d}{2}=1+\frac{5}{4}\\\\\frac{5d-4d}{8}=\frac{4+5}{4}\\\\\frac{d}{8}=\frac{9}{4}\\\\d=\frac{9\times 8}{4}=\frac{72}{4}=18\ km$

Therefore, the office is 18 km from his house.

6 0

3 years ago