An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in t
1 answer:
Answer:
a) 17.97 m/s
b) 16.5 m
Explanation:
The total distance that she runs is twice the distance between her and the table, which is 5.5 * 2 = 11m
So the time she would need to run that distance at a rate of 3m/s is
t = 11/3 = 3.67s
This is also the time it takes for the ball to be thrown up and down, which is twice the time it needs to reach the top, its maximum height at v = 0 m/s
So the time for the ball to reach maximum height is 3.67 / 2 = 1.83 s
Let g = 9.8m/s2. For the ball to get to 0 within 1.83s at the deceleration of 9.8m/s. Its initial speed must be
v = gt = 9.8*1.83 = 17.97 m/s
As she reaches the table within half of the total time (3.67 /2 = 1.83s), the position of the ball would be
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Answer:
The magnitude of an earthquake is 5.6.
Explanation:
The magnitude of an earthquake can be found as follows:
Where:
I: is the intensity of the earthquake = 37.25 cm
S: is the intensity of a standard earthquake = 10⁻⁴ cm
Hence, the magnitude is:
Therefore, the magnitude of an earthquake is 5.6.
I hope it helps you!
Explanation:
Given that,
Radius R= 2.00
Charge = 6.88 μC
Inner radius = 4.00 cm
Outer radius = 5.00 cm
Charge = -2.96 μC
We need to calculate the electric field
Using formula of electric field
(a). For, r = 1.00 cm
Here, r<R
So, E = 0
The electric field does not exist inside the sphere.
(b). For, r = 3.00 cm
Here, r >R
The electric field is
Put the value into the formula
The electric field outside the solid conducting sphere and the direction is towards sphere.
(c). For, r = 4.50 cm
Here, r lies between R₁ and R₂.
So, E = 0
The electric field does not exist inside the conducting material
(d). For, r = 7.00 cm
The electric field is
Put the value into the formula
The electric field outside the solid conducting sphere and direction is away of solid sphere.
Hence, This is the required solution.