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3 years ago

How might you use a rope and pulley to move a wagon up a ramp?

1 answer:

7 0

You could attach the pulley to a secure object on the top of the ramp, and crank the pulley to bring the wagon up said ramp into a loading bay perhaps, or a track.

Hope I helped.

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A large piece of jewelry has a mass of 132.6 g. a graduated cylinder initially contains 48.6 ml water. when the jewelry is subme

Lerok [7]

The density of the substance is 10.5 g/cm³.

The jewelry is made out of Silver.

Density ρ is defined as the ratio of mass m of the substance to its volume V. The cylinder contains a volume V₁ of water and when the jewelry is immersed in it, the total volume of water and the jewelry is found to be V₂.

The volume V of the jewelry is given by,

$V=V_2 -V_1$

Substitute 48.6 ml for V₁ and 61.2 ml for V₂.

$V=V_2 -V_1\\ =61.2 ml -48.6 ml\\ =12.6 ml$

calculate the density ρ of the jewelry using the expression,

$\rho =\frac{m}{V}$

Substitute 132.6 g for m and 12.6 ml for V.

$\rho =\frac{m}{V}\\ =\frac{132.6 g}{12.6 ml} \\ =10.5 g/ml$

Since $1 ml=1 cm^3$ ,

The density of the jewelry is 10.5 g/cm³.

From standard tables, it can be seen that the substance used to make the jewelry is silver, which has a density 10.5 g/cm³.

4 0

3 years ago

Describe Why is it difficult for a human to travel long distance in space

BaLLatris [955]

Answer:

it is diffuluct for a human because we understand so littlebout how to build a self-sustaining ecosystem that can support us, especially under tight constraints as to its total mass. Simply getting into Earth orbit

Explanation:

That is why it is diffulcut

7 0

3 years ago

Which of the following will cause an increase in gas pressure in a closed container?

kati45 [8]

D. Both b and c is the answer

7 0

3 years ago

Which of the following is an example of a primary source?

astra-53 [7]

Answer:

scientific journal

in my guess

6 0

3 years ago

List 2 examples of objects demonstrating mechanical energy.

OlgaM077 [116]

Windmills run on the principle of mechanical energy and work. Moving air (wind) possesses some amount of energy in the form of kinetic energy (due to motion). This energy gives the air the ability to do work on the blades of the fan.

6 0

2 years ago