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3 years ago

Friction can be reduced by using ___________.

Physics

2 answers:

Zolol [24]3 years ago

7 0

Answer: Using lubricants such as oil or grease can reduce the friction between the surfaces.

Explanation: When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.

allsm [11]3 years ago

6 0

Answer:

Make the surfaces little more smoother. ...

Lubrication is another way to make a surface smoother. ...

Make the object more streamlined. ...

Reduce the Normal force acting between the surfaces in contact. ...

Reduce the contact between the surfaces, so that less number of bonds will be formed.

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(e)<br> Give an example of a process when electrons behave as:<br><br> A.particles.<br> B.a wave.

borishaifa [10]

Answer:

particles

Explanation:

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3 years ago

On the moon, a feather is dropped from a height of 1.40 m. The acceleration of gravity on the moon is -1.67 m/s2. Determine the

Molodets [167]

Answer:

1.29 s

Explanation:

Height = 1.40m
Acclⁿ due to gravity = 1.67 m/s²
Time of descent = ?

As we know that ,

$\sf\longrightarrow Time_{descent}= \sqrt{\dfrac{2H}{g_{(moon)}}}\\\\\sf\longrightarrow t_d = \sqrt{\dfrac{ 2\times 1.4}{1.67}} \\\\\sf\longrightarrow t_d =\sqrt{1.67} s\\\\\sf\longrightarrow \boxed{\red{\sf Time_{descent}= 1.29 s }}$

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3 years ago

On land, coal is transported primarily by train. A typical large coal train may be about 1.5 km long and may consist of 120 cars

WINSTONCH [101]

Answer:

equivalent power = 6.60 × $10^{12}$ W

Explanation:

given data

coal train length = 1.5 km = 1500 m

contain = 120 cars

holding= 110 tonnes of coal each

train traveling speed = 100 km/h = 27.78 m/s

to find out

equivalent power in watts

solution

we take here energy produce by coal is 27 × $10^{6}$ J/kg

and here total coal = 120 × 110 × 10³ kg

sop here energy produce by total coal is

energy produce by total coal = 27 × $10^{6}$ × 120 × 110 × 10³

and time required to cross that distance is

time = $\frac{distance}{speed}$

time = $\frac{1500}{27.78}$

time = 53.99 sec

so here equivalent power will be

equivalent power = $\frac{energy}{time}$

equivalent power = $\frac{27*10^6*120*110*10^3}{53.99}$

equivalent power = 6.60 × $10^{12}$ W

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3 years ago

Research indicates many adults experience emotional turmoil during their 40s. T or F

kondaur [170]

In a person's forties, they are in the middle of stagnation vs. identity, so they are having an identity crisis.

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4 years ago

Read 2 more answers

What’s the difference between expressed/implied powers, concurrent powers, and reserved powers?.

Lisa [10]

Answer:

A reserved power is a power specifically reserved to the states. Powers include setting up local governments and determining the speed limit. A concurrent power is a power that is given to both the states and the federal government.

Explanation:

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3 years ago