Answer:
For this case we can use the model given by:
Where K is a constant and we can see W represent the spot of light and if D increases then W needs to decrease since the other variables remains constant.
Conclusion: The circular spot of light on the screen increase in diameter.
Explanation:
For this case we know that the diameter is:
And the hole diameter is increased by 20%, so the final diameter would be:
And for this case if we use concepts from the theory of rays we know that if the diameter of the hole gets bigger then the hole wuld increase.
For this case we can use the model given by:
Where K is a constant and we can see W represent the spot of light and if D increases then W needs to decrease since the other variables remains constant.
Conclusion: The circular spot of light on the screen increase in diameter.
Answer:
D. Iron is more easily magnetized than steel but steel is more easily demagnetized than iron.
Answer:
Stunt Car A experiences a large force over a short period of time. Stunt Car B experiences a small force over a long period of time. Because of the force experienced by Stunt Car A, it will sustain more damage than Stunt Car B.
Explanation:
Both cars have the same mass and velocity, therefore they have the same momentum. During the collision, the total momentum of the car A and brick wall is conserved as well as the total momentum of the car B and the pile of leaves.
However, if we are to investigate the damage on each car, we should look at the cars not the whole system. So, the momentum difference between the cars gives us the impulse that the car felt.
Since the Car A will crash the wall quicker than the other car crashes through the pile of leaves,
which gives us
<span>Hello, AphCoffee!
B. move from the negatively charged body to the positively charged body
This is because the negative free electrons will be attracted to the positive body and then the electrons will move to the positive body.
Hope this helps :)</span>
Answer: 15Nm
Explanation:
Work is said to be done when a force cause a body to move through a distance. Mathematically,
Work = Force (F) × distance (s)
If F = F~ = (3 N)ˆı + (−1 N) ˆj + (7 N) ˆk
S = (5 m)ˆı + (3 m) ˆ + (−4 m) ˆk
According to vector notation,
i.I = j.j =k.k = 1
Multiplication of different component will give 'zero'
F×s = (3 N)ˆi × (5 m)ˆı
Work done = 15Nm