Mass of block A above is 25-kg. Calculate the force of gravity on block A.

You have a mixture of substances with diifferent sized molecules. How could you seperate them?

Trava [24]

Distillation, Magnetism, Filtration, Crystallization, Extraction,

3 0

4 years ago

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What is the net force on an object that has a mass of 2.5 kg and accelerates to the right at 2 m/s?

Nadya [2.5K]

Answer:

5 N

Explanation:

The formula that you've to use to find the force is :

Force = Mass × Acceleration

They have already given that,

m = 2.5 kg

a = 2 ms⁻²

Let us find now.

F = m a

F = 2.5 kg × 2 ms⁻²

F = 5 N

Hope this helps you :-)

Let me know if you have any other questions :-)

5 0

2 years ago

What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is 5.66 0.09 m?

iren2701 [21]

Answer:

4.77 %

Explanation:

We know that the volume V for a sphere of radius r is

$V(r) = \frac{4}{3} \ \pi \ r^3$

If we got an uncertainty $\Delta r$ the formula for the uncertainty of V is:

$\Delta V(r) = \sqrt{ (\frac{dV}{dr} \Delta r)^2 }$

We can calculate this uncertainty, first we obtain the derivative:

$\frac{dV}{dr} = 3 * \frac{4}{3} \ \pi \ r^2$

$\frac{dV}{dr} = 4 \ \pi \ r^2$

And using it in the formula:

$\Delta V(r) = \sqrt{ (4 \ \pi \ r^2\Delta r)^2 }$

$\Delta V(r) = \sqrt{ 4^2 \ \pi^2 \ r^4 \Delta r^2 }$

$\Delta V(r) = 4 \ \pi \ r^2 \Delta r$

The relative uncertainty is:

$\frac{\Delta V(r)}{V(r)}$

$\frac{ 4 \ \pi \ r^2 \Delta r }{ \frac{4}{3} \ \pi \ r^3}$

$\frac{ 3 \Delta r }{ r}$

Using the values for the problem:

$\frac{ 3 * 0.09 m }{ 5.66 m} = 0.0477$

This is, a percent uncertainty of 4.77 %

4 0

3 years ago

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Kitty [74]

༼ つ ◕_◕ ༽つ༼ つ ◕_◕ ༽つ༼ つ ◕_◕ ༽つ☜(ﾟヮﾟ☜)(☞ﾟヮﾟ)☞☜(ﾟヮﾟ☜)(☞ﾟヮﾟ)☞( ´･･)ﾉ(._.`)?

8 0

3 years ago

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The PV system is operating in a location where the annual average daily incident solar energy (the insolation) on the array equa

vlabodo [156]

The average amount of solar energy incident on the PV per day is 10000 kWh/day.

<h3>Equation</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Let the PV array has an area equal to 50 square meters. Hence:

Average amount of solar energy incident on the PV per day = 200 kWh/m²/day * 50 m² = 10000 kWh/day.

Find out more on Equation at: brainly.com/question/2972832

5 0

2 years ago