Answer:
Approximately
.
Assumption: air resistance is negligible.
Explanation:
Make sure all the values are in standard units.
.
The bounce here is an inelastic collision between the ball and the surface. Some of the kinetic energy (KE) was lost. The exact value of energy loss would be equal to
.
Before the bounce, all the kinetic energy of the ball would come from the drop from
. That is:
.
After the bounce, the ball travels to a height of
. All the potential energy gained in that process should come from the kinetic energy when the ball bounces back from the ground.
.
Hence, the size of energy loss due to the bounce would be equal to
.
Ice is denser at 4 degrees C
The speed of the two boats are 7 miles per hour and 24 miles per hour.
Explanation:
Let the speed of the first boat be x miles per hour and second boat be x+17 miles per hour.
As they move at right angle to each other, this problem can be solved using Pythagoras theorem.
The two boats will form a right angle with hypotenuse 25 miles after one hour.
Applying the theorem we get,
![x^{2} +(x+17)^{2}=25^{2}](https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20%2B%28x%2B17%29%5E%7B2%7D%3D25%5E%7B2%7D%20%20%20)
![2x^{2} +34x + 289=625](https://tex.z-dn.net/?f=%202x%5E%7B2%7D%20%2B34x%20%2B%20289%3D625%20)
![2x^{2} +34x - 336=0](https://tex.z-dn.net/?f=%202x%5E%7B2%7D%20%2B34x%20-%20336%3D0%20)
![(x+24)(x-7)=0](https://tex.z-dn.net/?f=%20%28x%2B24%29%28x-7%29%3D0%20)
∴ x= -24 and 7
As speed cannot be negative,
We get speed of first boat = 7 miles per hour and
Speed of second boat = 7+17 = 24 miles per hour.
<h3>160 W</h3>
If the temperature is doubled to 2t, the rate at which it will now radiate is 160 W.
<h3>What is meant by emissivity?</h3>
- The ability of a substance to reflect heat radiation from its surface is measured by its emissivity.
- Thermal radiation is a type of electromagnetic radiation that includes infrared radiation, which the human eye cannot perceive, as well as visible radiation (light).
- According to the Stefan-Boltzmann law, emissivity is the quantitative comparison between the thermal radiation of a surface and that of an ideal black surface at a given temperature.
- Between 0 and 1 is the ratio's range.
<h3>What is energy radiation?</h3>
- The emissivity of a substance is a measurement of how well it reflects heat radiation from its surface.
- Two elements that affect power dissipation in the form of radiation are the material's surface emissivity and the temperature difference between the chip surface and the surrounding air.
To learn more about emissivity visit:
brainly.com/question/14279657
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They all end with suffix "-ide"
In short, Your Answer would be Option C
Hope this helps!