First, we need to fight the weight of the balls instead of their mass. We do this by multiplying their weight it kg by 9.8. This gives us .98 N. To find the potential energy of the rolling ball, we find its kinetic energy. The formula for this is KE=mass*velocity^2*1/2.
Plugging in our numbers, we have Kinetic energy = .1 * 1^2*1/2 which gives us .05 joules.
Now we find the potential energy of the ball on the shelf. For this we do:
Potential energy = .1*9.8*1, and our answer is .98 joules. Clearly, the ball on the shelf has more energy.
The distance travelled by the baseball is 221 m.
<u>Explanation:</u>
Speed is the ratio of distance travelled to the time taken to cover any distance. So here the speed is given as 96 m/s and time is given as 2.3 seconds. Thus, we can determine the distance as product of speed with time.
Thus, distance = speed × Time
As the speed is 96 m/s and time is 2.3 seconds.
The distance = 96 × 2.3 =220.8 m
If we approximate it, the distance is 221 m. Thus, the distance travelled by the baseball is 221 m.
The ray will not emerge into the air medium from glass medium.
To find the answer, we need to know about the critical angle.
<h3>What's critical angle of glass?</h3>
- Critical angle of a medium can be determined from the relation as sinФ = 1/n, n = refractive index of that medium.
- As glass has refractive index of 1.5, so Critical angle = sin⁻¹(1/1.5) = 42 °
<h3>Why does the light incident at 45° inside a glass not emerge to the air medium?</h3>
- As we got the critical angle of glass is 42°, so the light incident at 45° which is greater than 42° will reflect back into the glass medium instead of emergence into the air medium.
Thus, we can conclude that the light will not emerge into air medium.
Learn more about the critical angle here:
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B. A wave travels through medium. Hope this helped!
Answer:
Because their properties like conductivity, electronic configuration and ionization lies in between the metals and nonmetals.
Explanation:
There are a total of six elements that fall in the category of semiconductors.
Namely these are boron, silicon, germanium, arsenic, antimony, and tellurium.
These elements look like metals i.e. are lustrous but do not conduct electricity so well like a metal does.
Their chemical behavior falls between that of metals and nonmetals. For example, the pure metalloids form covalent crystals like the nonmetals, but like the metals, they generally do not form mono-atomic anions.