Answer:
Explanation:
Radius of circular path of coin R = 12.5 x 10⁻²,
coefficient of static friction μs = .33
In order that the coin rotates in circular path , it requires centripetal force which is provided by friction. As speed of rotation increases , force of friction also increases to provide it required centripetal force. When the speed of rotation becomes too high so that frictional force can not compensate the increase in centripetal force then coin will start slipping or it starts moving with respect to turntable.
b ) At this point of time
centripetal force = limiting force of friction
mω² R = μs mg , m is mass of the coin , ω is angular velocity ,
ω² R = μs g
ω² x 12.5 x 10⁻², = .33 x 9.8
ω² = .33 x 9.8 / 12.5 x 10⁻²,
= 25.87
ω = 5.08 rad / s
2π / T = 5.08
T = 2π / 5.08
= 1.23 s .
Explanation:
Increase the temperature in Endothermic reactions (Reactions that absorb energy, or become cold) Decrease the temperature in Exothermic reactions (Reactions that release energy, or become hot) Add a catalyst (A substance that reduces activation energy, speeding up the reaction) Increase the concentration of reactants.
source: https://socratic.org/questions/how-can-a-chemical-change-be-speeded-up
The correct answer is option 2. Systems, by
nature, tend to undergo changes toward higher entropy and lower energy since
this is the state where they are most stable. Entropy is the degree of
disorderliness of a substance. Systems tend to go to higher disorder since
systems always tend to change which can be linked to disorder and is
inevitable.
Answer:
14
Explanation:
45km =28 mph since its only half an hour divide rusty by 2 = 14
Answer: The Melted Crayon Represent In The Model Is Lava Because When Lava Hardens It Can Harden Into Rocks Called Igneous Rock, Sedimentary Rock, Magma, And Metamorphic Rock
Explanation: