Answer:
Explanation:
There are so many factors which works to stop a car from sinking into road surface. One is reaction force other factors are density of material from which the car is made of, mass and shape of car.but the most important force is the reaction force. According to the Newton's 3rd law of motion:- every force have equal force acting in opposite direction.
by the engine and is equal to the opposite
force of air resistance. Describe how these
forces compare when the plane speeds up
and slows down. In which direction is the
net force on the airplane in each case?
Explanation:
In an airplane flying a constant speed, the force exerted by the engines pushing the plane forward is equal to the opposite force exerted by air resistance.
B)freezing
C)melting
D)boiling
At point B, the substance undergoes deposition, transitioning directly from a gas phase to a solid phase. The correct option is a.
At point B on the phase diagram, the phase transition occurring is deposition. Deposition is a physical process in which a substance transitions directly from a gas phase to a solid phase without passing through the liquid phase. This change is driven by a decrease in temperature or an increase in pressure.
During deposition, gas particles lose energy, causing them to slow down and come together to form a solid structure. This process is exemplified in nature when water vapor in the atmosphere turns directly into frost or ice crystals on a cold surface. Deposition is the opposite of sublimation, where a substance transitions from a solid to a gas without becoming a liquid.
To know more about Deposition:
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Answer:
C. melting
option C is correct answer.
Answer:
You used the property of density.
Explanation:
The ice cube floats in water because it is less dense and sinks in alcohol because it is more dense than the alcohol.
PT HW 3.1
(linear) Kinetic Energy and Wor
1.a. A bicycler has a mass of 80. kg. He pedals the bike 100 min 20 seconds. What is
his kinetic energy (KE;)?
Given, Unknown:
Equation, Substitute:
Solution:
1.b. The bicycler (still 80.kg of mass) doubled his speed to 200m in 20 seconds, What
his new kinetic energy (KE)? What is the ratio of KE; and KE?
Given, Unknown:
Solution
Equation, Substitute:
1.c. The bicycler doubled his speed. What happened to his KE?
2.a. Car A has a mass of 250. kg. It's engine accelerates it from 0.0 to 20. m/s in 6.0
ndo (a) what is the car's acceleration in m s?
tio hstitute:
Solution:
Answer:
1.a) 1 kJ
1.b) 4 kJ
ratio 1:4
1.c) 4 times as before
2.a) 3.33 m/s2
Explanation:
1.a) bicycle's velocity =Displacement/time
=100/20 m/s
=5 m/s
bicycler's KE =1/2 *mass*(velocity)^2
=1/2*80*5^2
=1000 J = 1 kJ
1.b) bicycle's new velocity =200/20 m/s
=10 m/s
bicycler's new KE =1/2*80*10^2
=4000 J = 4 kJ
Ratio= KE 1 :KE new
= 1 :4
1.c) when bicycler's speed was doubled it increased the KE by 4 times (2^2). because In KE we consider the square of the speed , so the factor we increase the speed , the KE will get increased with the square value of it
ex : speed is triple the prior value , then the KE is as 3^2 times as before. that is 9 times
2.a) car acceleration = (20-0)/6 m/s2
= 3.33 m/s2