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3 years ago

HUUUUURRRRRYYYYY

Physics

2 answers:

larisa86 [58]3 years ago

5 0

Answer:

solid to gas or gas to liquid

Explanation:

welcome

Sindrei [870]3 years ago

4 0

Answer:

solid to gas or gas to liquid

Explanation:

Edge

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What can happen to the motion of an object when there is a resultant force on it

MA_775_DIABLO [31]

Then, it would continue the motion in direction of resultant force...

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3 years ago

1. What is the kinetic Energy of a 1500kg object moving at 21 m/s?

Wewaii [24]

The formula for working out kinetic energy is

=122

KE = kinetic energy
m = mass of a body
v = velocity of a body

kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

For the first one I think :
Answer:
KE = 330750 J

I’m not sure about the second one- sorry

The third is
Answer:
KE = 41454 J

Hope it helps and it is correct, sorry if it isn’t !

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3 years ago

A machine part has the shape of a solid uniform sphere of mass 250 g and a diameter of 4.30 cm. It is spinning about a frictionl

zysi [14]

Answer: $\alpha =9.302\ rad/s^2$

Explanation:

Given

mass of sphere $m=250\ gm$

diameter of sphere $d=4.30\ cm$

radius $r=\frac{4.30}{2}\ cm$

$f=0.0200\ N$

friction will provide resisting torque so

$f\times r=I\times \alpha$

where $I=\text{moment of Inertia}$

$f=\text{friction force}$

$\alpha =\text{angular acceleration}$

$I=\frac{2}{5}mr^2$

$0.02\times r=\frac{2}{5}mr^2\times \alpha$

$\alpha =\frac{5}{2r}\times f$

$\alpha =\frac{5}{2}\times \frac{2}{4.3\times 10^{-2}}\times 0.02$

$\alpha =9.302\ rad/s^2$

(b)time taken to decrease its rotational speed by $21\ rad/s$

$t=\dfrac{\Delta \omega }{\alpha }$

$t=\dfrac{21}{9.302}$

$t=2.25\ s$

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3 years ago

Jean- Baptiste Say argued that entrepreneurs should be called the fourth factor of production because they

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The correct answer is A) entrepreneurs organize the other factors, which are land, labor, and capital. The basic premise is that having land, labor, and capital, without someone pushing to develop a new product or service out of it, does not result in production per se.

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3 years ago

A 12 V automobile battery is connected to an electric starter motor. The current

krek1111 [17]

Answer: $3000\ W,\ 78,000\ J$