Answer:
Given:
Th = 270 °C = 270+273 = 543 K, hot temperature
Tc = 210 °C = 210+273 = 363 K, cold temperature
According to the Carnot theorem, the maximum efficiency achievable by a heat engine between a hot and cold temperature is
η = 1 - Tc/Th
= 1 - 363/543
= 0.668 = 11.047 (approx)
Answer: 11.0% (nearest integer)
Answer:
Things that have the same charge push each other away (they repel each other). This is called the Law of Charges. … Things that have more electrons than protons are negatively charged, while things with fewer electrons than protons are positively charged. Things with the same charge repel each other.
Explanation:
The element number 17 is associate with Chrlorine which has 17 protons and 18 neutrons.
1. It will take 0.45 s for the bowling ball to fall 1 m
2. it will take 0.45 s for the ping pong ball to fall 1 m
<h3>Data obtained from the question</h3>
From the question given above, the following data were obtained:
- Height (h) = 1 m
- Acceleration due to gravity (g) = 9.8 m/s²
- Time (t) =?
<h3>How to determine the time taken to fall</h3>
The time taken for the bowling ball to fall can be obtained as illustrated below:
h = ½gt²
1 = ½ × 9.8 × t²
1 = 4.9 × t²
Divide both side by 4.9
t² = 1 / 4.9
Take the square root of both side
t = √(1 / 4.9)
t = 0.45 s
Thus, it will take 0.45 s for the bowling ball to fall.
Considering the ping pong ball, it will also take 0.45 s to fall 1 m since the same gravity is acting on it
Learn more about motion under gravity:
brainly.com/question/22719691
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Answer:
<em>The centripetal acceleration would increase by a factor of 4</em>
<em>Correct choice: B.</em>
Explanation:
<u>Circular Motion</u>
The circular motion is described when an object rotates about a fixed point called center. The distance from the object to the center is the radius. There are other magnitudes in the circular motion like the angular speed, tangent speed, and centripetal acceleration. The formulas are:
If the speed is doubled and the radius is the same, then
The centripetal acceleration would increase by a factor of 4
Correct choice: B.