Answer: .0380575J
Explanation:
The coffee filter originally only had potential energy, which can be found by:
PE = m * g * h → PE = .0013 * 9.8 * 3 = .03822 J
*Note the mass must be in kg!!!
All of this energy should be converted to kinetic energy, but the air molecules take some of the energy; the energy they gain can be found by finding how much energy the filter has at the bottom of its fall, and subtracting this from the original energy to see how much was lost;
All of the energy at the bottom equals kinetic energy, which can be found by:
KE = 1/2 * m * v^2 → KE = 1/2 * .0013 * .5^2 = .0001625 J
Thus, the air gained .03822 - .0001625 = .0380575J :)
Answer:
Rarefaction
Explanation:
A place where molecules are far apart is a Rarefaction.
Rarefaction is the opposite of compression. Rarefaction is the reduction of an item's density. Rarefaction waves exist in nature also. Rarefaction is a part of sound waves. Half of the sound wave is the decompression of the medium.
It is caused as a result of the change in the speed of light as it enters from one medium to another.
A rarefaction is a place in a longitudinal wave where the molecules are far apart.
Answer:
Correct answer: W = 2,240 J
Explanation:
Given:
m = 70 kg
V₁ = 6 m/s
V₂ = 10 m/s
W = ?
Work is a measure of change in this case of kinetic energy:
W = ΔE = (m V₂²)/ 2 - (m V₁²)/ 2 = (m / 2) · (V₂² - V₁²)
W = (70 / 2) · (10² - 6²) = 35 · (100 - 36) = 35 · 64 = 2,240 J
W = 2,240 J
God is with you!!!
Answer:
1.Close
2.Exert inter.olecular force
3.Same
4.can
- loosely
- exert kinetic energy
- move
- very loose packed
- freely
- also exert kinetic enegy
The atomic mass of an element is the sum of its protons and neutrons. If the element has 8 protons and 9 neutrons, then its atomic mass is 8+9 which is equal to 17. The correct answer is 17.