Answer:
A
Explanation:
Friction is a force that makes an object slow down. Not speed up, cause it to move, or occurs in a vacuum. Friction is often caused by the surface an object is moving on.
Answer:
-4.8 m/s²
Explanation:
Apply Newton's second law:
∑F = ma
F − mg = ma
300 N − (60 kg) (9.8 m/s) = (60 kg) a
a = -4.8 m/s²
The acceleration five seconds after jumping is 4.8 m/s² downward.
It helps reduce the amount of carbon emissions released into the air
<span>An electrostatic precipitator is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding(slowing down) the flow of gases through the unit.
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a device for removing small particles, as of smoke, dust, or oil, from a gas, as air, by passing the gas first through an electrically charged screen that gives a charge to the particles, then between two charged plates where the particles are attracted to one <span>surface.
</span>http://www.britannica.com/technology/electrostatic-precipitator
Answer: A) In case of dark energy increasing significantly, the universe would accelerate its expansion at an ever-increasing rate which later on may result in "Big Rip".
B) In case of dark energy decreasing significantly, the universe would decelerate its expansion which later on may result in "Big Crunch".
Explanation:
In case of significant increase in dark energy, the universe would accelerate its expansion at more increasing rate. Ultimately the expansion would result in scale factor becoming infinite within a finite period of time. As a result due to the repulsive dominance of dark energy the whole universe would come apart resulting in a situation called "Big Rip"
If dark energy were to decrease significantly enough with time, the accelerating expansion of the universe that is observed now would start to decelerate as the mass once again dominates over dark energy. It will result in universe reversing its expansion resulting in its collapse, a situation called "Big Crunch".
Hope it helps!!!