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aev [14]
3 years ago
5

PLS HELP! A boy drops a ball from an observation tower. The ball hits the ground in 3.0 s. What is the ball's velocity at the ti

me of impact?
Physics
1 answer:
Levart [38]3 years ago
4 0

Answer:

v = u + at

v = 0 + 9.8 × 3

v = 29.4 m/sec

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A positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread as shown
Tcecarenko [31]

Answer:

The positive ball would go first to the negatively charged plate.

Explanation:

After which, it would hold a more negative charge. Due to the negative charge, it would travel towards the positive plate. Thereby, it would transfer negative electrons to the positive plate once more. In doing so, it would transfer positive protons to the negative plate. After which, it would hold more  negative electrons and be drawn towards the positive plate once more. The Process would continue until the once-positive and once-negative became neutral ( and were discharged.) Additionally, the ball hanging on the insulator thread would also be neutral and discharged.

6 0
3 years ago
How can I solve the following statement?
Firlakuza [10]

Answer:

The net electric field at the midpoint is 6.85 x 10^7 N/C.

Explanation:

q = − 8.3 μC

q' = + 7.8 μC

d =  9.2 cm

d/2 = 4.6 cm

The electric field due to the charge q at midpoint is

E = \frac{k q}{r^2}\\\\E = \frac{9\times 10^9\times 8.3\times 10^{-6}}{0.046^2}\\\\E = 3.53\times 10^7 N/C leftwards

The electric field due to the charge q' at midpoint is

E' = \frac{k q}{r^2}\\\\E' = \frac{9\times 10^9\times 7.8\times 10^{-6}}{0.046^2}\\\\E' = 3.32\times 10^7 N/C

The resultant electric field at mid point is

E'' = E + E' = (3.53 + 3.32) x 10^7 = 6.85 x 10^7 N/C

7 0
3 years ago
When a ball is thrown up vertically, explain what happens and explain why final velocity is zero ​
ipn [44]

Answer:

As you throw the ball up into the air, its direction is up, but the speed decreases due to the pull of gravity. The ball slows down, and at the very top of its flight, its velocity at that instant is zero.

3 0
3 years ago
Contrast electron movement within conductors and insulators.
irina1246 [14]

Answer:

Below

Explanation:

● What makes conductors special is that they have some free electrons that can move.

● An insulator has no free electrons wich explains why current isn't transmitted through it.

8 0
3 years ago
Read 2 more answers
A person began running due east and covered 15 km in 2.0 hr. What is the average velocity of the person?
g100num [7]
Velocity = distance / time

v = (15*1000)m / (2*60*60)s

v=2.08 m / s
6 0
3 years ago
Read 2 more answers
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