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2 years ago

2 ways in which the effects of friction can be minimised in the experiment

Physics

1 answer:

Vlad [161]2 years ago

7 0

Answer:

Friction can be minimized by using lubricants like oil and grease and by using ball bearing between machine parts. A substance that is introduced between two surfaces in contact, to reduce friction, is called a lubricant. Fluid friction can be minimized by giving suitable shapes to the objects moving in the fluids.

Explanation:

hope it helps

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Two cars of the same mass collide at an intersection. Just before the collision, one car is traveling east at 80.0 km/h and the

Elden [556K]

Answer:

$v_{f}=70\frac{km}{h}$

Explanation:

In a completely inelastic collision the momentum P is conserved, so can be expressed as:

$P_{f}-P_{i}=0$

As P is defined as: $P=m.v$

Replacing:

$m_{1}.v_{1f}+m_{2}.v_{2f}=m_{1}.v_{1i}+m_{2}.v_{2i}$ (Eq. 1)

As the problem says that the two cars have the same mass:

$m_{1}=m_{2}=m$

And in a completely inelastic collision the velocities after the collision are equal, so:

$v_{1f}=v_{2f}=v_{f}$

So replacing in Eq. 1:

$m.v_{f}+m.v_{f}=m.v_{1i}+m.v_{2i}$

$2m.v_{f}=m.(v_{1i}+v_{2i})$

Solving for $v_{f}$ :

$v_{f}=\frac{(v_{1i}+v_{2i})}{2}$

And replacing the values for the velocity:

$v_{f}=\frac{(80.0\frac{km}{h}+60.0\frac{km}{h})}{2}$

$v_{f}=70\frac{km}{h}$

5 0

2 years ago

HELP ASAP

velikii [3]

Answer:

A. negatively charged are deposited on the belt, which deposits positive charges on the metal ball.

Explanation:

Negatively charged ions are injected at one end of thebelt towards the high potntial terminal, where they are acclerated by attractive forces towards the terminal. When the particles reach the terminal, they are stripped of some electrons to make them positively charged.

5 0

3 years ago

Ben franklin showed that 1 teaspoon of oil would cover about 0.50 acre of still water. if you know that 1.0 x 104m2 = 2.47 acres

Dmitry_Shevchenko [17]

To solve for the thickness of the latter of oil, we can simply divide the volume by the total surface area:

Thickness = Volume / Surface Area

We are both given the volume and the surface area, all we have to do now is to convert the units in like terms so that we can cancel those out.

Surface Area = 0.50 acres (1.0 x 10^4 m^2 / 2.47 acres)

Surface Area = 2,024.29 m^2

Further converting this into cm:

Surface Area = 2,024.29 m^2 (100 cm / m)^2

Surface Area = 20,242,914.98 cm^2

Therefore the thickness is:

Thickness = 5.0 cm^3 / 20,242,914.98 cm^2

Thickness = 2.47 x 10^-7 cm

<span>Thickness = 2.47 x 10^-9 m = 2.47 nm = 24.7 A</span>

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3 years ago

Match the correct center and scale factor to each figure.

34kurt

Answer:

Image

Explanation:

I looked at the graph and assumed answers

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3 years ago

A virtual image produced by a lens is always

JulijaS [17]

The Answer Is D Because When Uu Magnify Large Items The Image Is Reflected Back To The Magnifying Glass Which Makes The Image Appear In The Back

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3 years ago

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2 ways in which the effects of friction can be minimised in the experiment​

2 ways in which the effects of friction can be minimised in the experiment