The outer radius of the ball = 6.70cm.
<h3>What is Buoyant Force?</h3>
The upward force applied to an object that is fully or partially submerged in a fluid is known as the buoyant force.
Given: Mass of aluminum ball = 
To find: The outer radius of the ball.
Finding:
As Buoyant Force = 
,
The weight of the ball should be equal to the buoyant force since it floats on the water.
That is,
=> 
=> 
Upon substitution of values of 
and g, we get: 
Hence, the outer radius of the ball = 6.70cm
To learn more about Buoyant Force, refer to the link: brainly.com/question/17009786
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Answer:
The ball will reach the ground in 0.8s
Option C
Explanation:
Given:
- Takes t = 0.8 s for ball to reach ground when thrown horizontal from top of a building.
Find:
If it had been thrown with twice the speed in the same direction, it would have hit the ground in how many second.
Solution:
- We know that the amount of time taken to hit the ground is determined by the vertical distance i.e height at which it is thrown. The displacement of ball from top is given by:
S_y = S_o + V_i,y*t + 0.5*g*t^2
- We know that the S_o = height of the building.
We also know that the ball os thrown horizontally; hence, y-component of initial velocity is zero. V_y,i = 0
0 = h + 0 + 0.5*g*t^2
- Hence, the time taken t is:
t = sqrt ( 2h / g)
- The time taken to reach the ground is independent of the initial speed. Hence, the ball will reach the ground in 0.8s .
My answer -
You can tell the speed of a car at any instant by looking at curved path but it does not move with the average speed of any object moving in a straight line.
P.s
Happy to help you have a AWESOME!!!! day ^-^
Momentum is mass times velocity. So here we can just substitute in our givens and solve for velocity.
.600kg*m/s/.350kg=1.71m/s
Hope this helps! Thank you!
Answer:
4 m/s
Explanation:
to find m/s, divide the meters term by the seconds term. 100m/25s = 4m/s
