Answer:
the 3rd one
Explanation:
1) Temperature change
2 ) exothermic release of energy
3) Endothermic absorption of energy
I hope that's help !
When the force of air resistance equals the downward force of gravity, the net force on a falling object becomes zero, meaning it will fall at a constant speed.
The subject of this question is Physics, specifically focusing on the aspects of forces, gravity, and air resistance involved when an object is in free fall. When the magnitude of the upward air resistance equals the downward pull of gravity, the net force on the ball becomes zero. According to Newton's second law of motion, when the net force on an object is zero, its acceleration is also zero, meaning it will not speed up or slow down. In this case, the ball will fall at a constant speed. Therefore, the correct answer is b) fall at a constant speed.
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Answer: 94.9 metres
Explanation:
Given that,
Force between the two charges (F) = 24x10² N
Negative charge (q1) = 8x10-5C
Positive charge (q2) = 3x10C
Distance between charges (r) = ?
Apply the formula for
F= (kq1q2) / r²
Recall that k is Coulomb's constant with a value of 9 × 10^9 Nm2C−2
Then,
24x10² N = (9 × 10^9 Nm2C−2 x 8x10-5C x 3x10C) / r²
24x10² N = (2.16 x 10^7) / r²
r² = (2.16 x 10^7 / 24x10² N)
r² = 9000
To get the value of r, find the square root
r = √9000
r = 94.868m (rounded to the nearest tenth as 94.9m)
Thus, a distance of 94.9 metres separates the charges.
The rock on the ground has more kinetic energy compared to the feather floating through the air, due to the force of gravity.
Kinetic energy is the energy of motion, and a moving object has kinetic energy. Potential energy, on the other hand, comes in several forms, such as gravitational potential energy. When comparing a feather floating through the air and a rock on the ground, we can say that the rock has more kinetic energy.
This is because the rock, when dropped, falls to the ground due to the force of gravity, gaining kinetic energy in the process. The feather, on the other hand, is floating through the air and not experiencing the same gravitational pull, thus having less kinetic energy than the rock.
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1000 centiliters = 1 liter.
500 centiliters = x liter
1000 / 500 = 1/x Cross multiply
1000x = 500 Divide by 1000
x = 500/1000
x = 1/2
500 centiliters = 1/2 or 0.5 of a liter.
For the conversion process, 500 centiliters is equivalent to 5 liters.
Centiliters (cL) and liters (L) are both units of volume. Centiliters are a smaller unit, while liters are a larger unit. To convert from centiliters to liters, use the conversion factor of 100 centiliters per 1 liter.
In the given scenario, there is 500 centiliters. To convert this to liters, divide the number of centiliters by 100. This division accounts for the fact that there are 100 centiliters in 1 liter.
Given:
500 centiliters (cL)
To convert 500 centiliters to liters:
500 cL ÷ 100 = 5 liters
Therefore, 500 centiliters is equivalent to 5 liters.
Find out more on centiliters here: brainly.com/question/30130125
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