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3 years ago

What can reduce a machines efficiency

Physics

2 answers:

algol [13]3 years ago

6 0

Answer:

its power.

Explanation:

DENIUS [597]3 years ago

5 0

Answer:

Friction.

Explanation:

Friction reduces motion in machines, thereby reducing the speed of production of the machine. This also generates heat.

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What is the formula for lithium and chlorine?

siniylev [52]

LiCl, because lithium (Li) has one positively charged ion (1+), and
chloride (Cl) has one negatively charged ion (1-), so they
cancel each other out.

7 0

3 years ago

Read 2 more answers

A 1.0-kilogram rubber ball traveling east at 4.0 meters per second hits a wall and bounces back toward the west at 2.0 meters pe

Mrrafil [7]

Answer:

8 J and 2 J

Explanation:

Given that,

Mass of the rubber ball, m = 1 kg

Initial speed of the rubber ball, u = 4 m/s (in east)

Final speed of the rubber ball, v = -2 m/s (in west)

We need to find the kinetic energy of the ball before it hits the wall, the kinetic energy of the ball after it bounces off the wall.

Initial kinetic energy,

$K_i=\dfrac{1}{2}mv^2\\\\K_i=\dfrac{1}{2}\times 1\times (4)^2\\\\K_i=8\ J$

Final kinetic energy,

$K_f=\dfrac{1}{2}mv^2\\\\K_f=\dfrac{1}{2}\times 1\times (2)^2\\\\K_f=2\ J$

So, the initial kinetic energy is 8 J and the final kinetic energy is 2 J.

8 0

3 years ago

A positive and a negative charge are released from rest in vacuum. They move toward each other. As they do: A positive and a neg

Pachacha [2.7K]

Answer:

A negative potential energy becomes more negative

Explanation:

Let the charges be - Q₁ and Q₂ . Let the distance between them be d .

Potential energy = k -Q₁x Q₂ / R

= - KQ₁ Q₂ / R

Now if the magnitude of R decreases , the magnitude of potential energy increases . So we see that the negative potential energy becomes more negative .

4 0

4 years ago

6. If the force applied is 4.5N and the spring constant is 9, how much will the

Andrew [12]

Answer:

F/K=4.5/9=0.5

Explanation:

that's the way to find it

3 0

3 years ago

Humpback whales sometimes catch fish by swimming rapidly in a circle, blowing a curtain of bubbles that confuses a school of fis

andre [41]

Answer:

1.2 x $10^4$ N

Explanation:

The centripetal force of a body moving in a circle is given by:

Centripetal force = $\frac{Mv^2}{r}$

where M = mass of the object, v = velocity with which the object is moving, and r = radius of the circle.

In this case, M = 25,000 kg, v = 2.0 m/s, and r = 8.2 m. Hence;

Centripetal force generated by the whale = 25,000 x 2^2/8.2

= 12,195.12 N = 1.2 x $10^4$ N to two significant digits.

8 0

3 years ago