Answer: Momentum = (mass) x (speed)
Divide each side by (speed): Mass = (momentum) / speed
Mass = (45,000 kg-m/s) / (30 m/s) =
1,500 kg .
Explanation:
Different temperatures must be true about two objects if heat is flowing between them
Answer: Option A
Explanation:
On bringing two objects with temperature differences, heat flows from a higher temperature to a lower temperature until there is thermal equilibrium according to the second law of thermodynamics.
Just like if we connect two tanks through a pipe with different water capacities. The water flows from the tank of higher water to a lower water level until both the tanks have the same water level.
The bigger the difference of temperature between two object, the higher the rate of heat flow from the hotter object to the cooler one. Two object, having same temperature doesn’t undergo a heat flow process.
The objects must be different temperatures. the exact temperatures don't matter
B) comet
C) earth
D) mars
Comets on average take the longest to orbit the sun (longest period), therefore the correct answer is option B.
It is a system that collection of all the planets and spatial bodies revolving around the sun because of the gravitational pull of the sun.
Our Solar System is based on a heliocentric model in which the Sun is assumed to reside at the central point of the planetary system.
The earth (on average) takes one year to orbit around the sun.
Mars on average takes 1.73 years to orbit around the sun.
astroid on average takes 4-5 years to orbit around the sun.
Comets on average take the longest to orbit the sun (longest period)
Thus, the correct answer is option C.
Learn more about SolarSystems here, refer to the link ;
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Surface tension - My definition -
It's exactly what it says - The tension of a surface with a liquid (such as water), caused by the attraction of the surfaces layer ---- I hope this helps ---- I actually did research it and got some of this from a dictionary, but I changed some of it, too.... Sorry if this doesn't help :)
Answer:
Speed of light = 3 * 10 ^8 m / s. Speed is related to the distance and time and so its unit is in meters and seconds. The speed of light value mentioned above is the value calculated in vacuum or air with the help of lasers.
But when it comes to water, refractive index has to be taken into account.The speed of light is faster in vacuum than other mediums.
by 68.0°C. What is the mass of the coin?
Please helppp!!!
The mass of the copper coin placed in 101g of water is 135.3g.
The mass of the copper coin can be calculated using the following expression:
Since; Q = mc∆T
Where;
According to the question;
COPPER METAL:
WATER:
m = 101g
c = 4.18 J/g°C
∆T = 8.39°C
⇒ 101 × 4.18 × 8.39 = (0.385 × m × 68)
⇒ 3542.09 = 26.18m
⇒ m = 3542.09 ÷ 26.18
⇒ m = 135.3g
Therefore, the mass of the copper coin placed in 101g of water is 135.3g.
Learn more about specific heat at: brainly.com/question/13439286
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Answer:
135g
Explanation: