3 years ago

Which of the following causes the efficiency of a machine to be less than 100%?

1 answer:

7 0

Friction would inhibit your speed and maximum work potential so, friction is the answer.
Hope this helps, Brainliest please.

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A car goes from a speed of 10m/s to 30m/s over 4s. If the car has a mass of 1000kg, How strong is the force pushing the car forw

dusya [7]

Answer:

i think ww

Explanation:

i think we need to calculate net force which is:

net force=m.a

..nf=1000kg×30m/s

therefore net force will be the answer you get whwn you multiply those two

5 0

3 years ago

If you put positive energy and negative energy into a spiral tube like a corkscrew with a barrier so they could not meet, so the

Aleksandr-060686 [28]

There are no rules that describe how positive energy behaves
in the presence of negative energy, because there is no such
thing as negative energy.

(Wellll ... in pop Psychology, perhaps, but not in any real science.)

3 0

3 years ago

You perform the Hooke's Law experiment and create a plot of Displacement vs. Force. You add a linear fit and find the following

balandron [24]

Answer: 0.192 N/m

Explanation:

Well, generally when a Hooke's Law experiment is performed the plot is in fact Force vs Displacement, being the Force (in units of Newtons) in the Y-axis and the Displacement (in units of meters) in the X-axis.

In addition, if we add a linear fit the resultant equation will be the Line equation of the form:

$Y=mX+b$

Where $m=\frac{Y_{2}-Y_{1}}{X_{2}-X_{1}}$ is the slope and $b$ is the point where the line intersects the Y-axis.

So, if the equation is:

$Y=0.192X+0.011$

The slope of this line is $0.192 N/m$ which is also the spring constant $k$ .

7 0

3 years ago

Sasha lifts a couch 8.2 meters from the ground floor of her house to the attic. If the couch has a mass of 120 kg, what is the g

gavmur [86]

As we know that gravitational potential energy is given by

$U = mgH$

here we have

m = mass = 120 kg

$g = 9.81 m/s^2$

h = height = 8.2 m

now from above formula

$U = 120kg (9.81 m/s^2) (8.2 m)$

$U = 9653.04 J$

so above is the gravitational potential energy of the couch

4 0

3 years ago

Read 2 more answers

Which principle(s) of the cell<br> theory shows that all organisms<br> are somehow similar?

Stolb23 [73]

Explanation:

The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.

hope it helps

plz mark as brainliest

7 0

3 years ago