A teacher wants to perform a classroom demonstration that illustrates both chemical and physical changes. Which would be the bes
2 answers:
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Answer:
The centripetal acceleration of the runner is .
Explanation:
Given that,
A runner completes the 200 m dash in 24.0 s and runs at constant speed throughout the race. We need to find the centripetal acceleration as he runs the curved portion of the track. We know that the centripetal acceleration is given by :
v is the velocity of runner
Centripetal acceleration,
So, the centripetal acceleration of the runner is . Hence, this is the required solution.
Answer:
the bunch of 23 electrons must be placed on y axis at coordinate y = - 24.35 m.
Explanation:
As we know that the gravitational force on electron at y = 0 is counter-balanced by the weight of the electron
So we have
here we have
also we know that
so we will have
so the bunch of 23 electrons must be placed on y axis at coordinate y = - 24.35 m.
<h3>Deniel's average speed for the total</h3><h3>distance is 3.6 mph</h3>
Average speed is difined as the total distance travelled divided by the total time required to cover the distance. Mathematically, it is expressed as:
To obtain the average speed of Daniel, we shall determine the distance travelled in each case. This is illustrated below:
<h3>Case 1:</h3>Speed 1 (S₁) = 6 mph
Time 1 (t₁) = 0.8 h.
<h3>Distance 1 (D₁) =? </h3>Cross multiply
D₁ = 6 × 0.8
<h3>D₁ = 4.8 mile</h3><h3>Case 2:</h3>Speed 2 (S₂) = 2 mph
Time 2 (t₂) = 1.2 h.
<h3>Distance 2 (D₂) =? </h3>Cross multiply
D₂ = 2 × 1.2
<h3>D₂ = 2.4 mile </h3>Next, we shall determine the total time. This can be obtained as follow:
Time 1 (t₁) = 0.8 h.
Time 2 (t₂) = 1.2 h.
<h3>Total time (T) =? </h3>T = t₁ + t₂
T = 0.8 + 1.2
<h3>T = 2 h</h3>Next, we shall determine the total distance. This can be obtained as follow:
Distance 1 (D₁) = 4.8 mile
Distance 2 (D₂) = 2.4 mile
<h3>Total distance (D) =?</h3>D = D₁ + D₂
D = 4.8 + 2.4
<h3>D = 7.2 mile</h3>Finally, we shall determine the average speed of Daniel. This can be obtained as follow:
Total time = 2 h
Total distance = 7.2 mile
<h3>Average speed =?</h3>Therefore, the average speed of Daniel is 3.6 mph
Learn more: brainly.com/question/680492