The hotter molecules become, the faster they move around. The colder they are, the more slow and lethargic they are
The minimum value of the coefficient of static friction between the block and the slope is 0.53.
<h3>Minimum coefficient of static friction</h3>
Apply Newton's second law of motion;
F - μFs = 0
μFs = F
where;
- μ is coefficient of static friction
- Fs is frictional force
- F is applied force
μ = F/Fs
μ = F/(mgcosθ)
μ = (250)/(50 x 9.8 x cos15)
μ = 0.53
Thus, the minimum value of the coefficient of static friction between the block and the slope is 0.53.
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A comet is the loose, icy body with a long, narrow orbit.
Comets are very small solar system body made mainly of ices mixed with smaller amounts of dust and rock. Most comets are not larger than a few kilometers across. The main body of the comet is called the nucleus, and it can contain water, methane, nitrogen and other ices. Their speeds vary depending on their orbits and where they are in it. The closer they are to the sun, the faster they are going.
The statement shows a case of rotational motion, in which the disc <em>decelerates</em> at <em>constant</em> rate.
i) The angular acceleration of the disc (), in revolutions per square second, is found by the following kinematic formula:
(1)
Where:
- - Initial angular speed, in revolutions per second.
- - Final angular speed, in revolutions per second.
- - Time, in seconds.
If we know that , y , then the angular acceleration of the disc is:
The angular acceleration of the disc is radians per square second.
ii) The number of rotations that the disk makes before it stops (), in revolutions, is determined by the following formula:
(2)
If we know that , y , then the number of rotations done by the disc is:
The disc makes 3.125 revolutions before it stops.
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Answer:
Burning Paper
Explanation:
This is a chemical reaction, because new substances are formed