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kondaur [170]
3 years ago
5

On a windless day, two identical balls P and Q are dropped from the top and the middle of a tower at exactly the same time as sh

own .Which will be more: the time taken by P to reach the middle of the tower ,or the time taken by Q to reach the ground?
Physics
1 answer:
Kruka [31]3 years ago
3 0

Answer: time is the same

Explanation: the distance(H) is the same in each case .

we drop the balls , no drag force using basic kimnematics

y =gt*t/2  , yo=0 , vo=0 , y=H  , so : t= sqrt(2H/g)

comment: if distance H starts to grow....we could begin to note a difference  because of gravity g is smaller as we go up

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Please help me with this very easy question I just don’t get it.
diamong [38]

Answer:

150m

Explanation:

The relation of speed/time and distance/time is a derivative/integral one, as in speed is the derivative of distance (the faster you go, the faster the distance changes, duh!).

So we need to compute the integral of speed over time from 0.0s to 5.0s.

The easiest way here is to compute the area under the line (it's going to be faster than computing the acceleration and using a formula of distance based on acceleration).

The area under the line is a trapezoid with "height" 5s, and the bases 10m/s and 50m/s. Using the trapezoid area formula of h*(a + b)/2

distance = 5s * (10m/s + 50m/s) / 2 = 5s * 60m/s / 2 = 5s * 30m/s = 150m

Alternatively, we can use the acceleration formula:

a = (50m/s - 10m/s)/5s = 40m/s / 5s = 8m/s^2

distance = v0 * t + a * t^2 / 2 = 10m/s * 5s + 8m/s^2 * (5s)^2 / 2 = 50m + 8m * 25 / 2 = 50m + 100m = 150m.

5 0
2 years ago
A ball with a mass of 1 kg is moving in a straight line at the same speed as a ball with a mass of 10 kg. Both balls are brought
Alenkasestr [34]

Answer:

A it takes less force to stop the 1 kg ball because it has less inerita

Explanation:

7 0
2 years ago
Read 2 more answers
Two resistors, 5.0 ohm's each can be combined to give an equivalent resistance of​
Ymorist [56]

Answer:

2 possible answers:

1# 2.5 Ω (when the resistors are in parallel)

2# 10 Ω (when the resistors are in series)

Explanation:

there are two possible answers for this:

1# if the resistors are in parallel in the circuit

then:

1/R-equivalent=1/5+1/5

1/R-equivalent=2/5

R-equivalent=5/2=2.5 Ω

2# if the resistors are in series in the circuit

then:

R-equivalent=5+5

R-equivalent=10 Ω

6 0
2 years ago
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yanalaym [24]

Answer:

2 \sigma bonds and 2 \pi bonds

Explanation:

If we consider the the bonding in the CO_{2} molecule:

O = 1s^{2}\ 2s^{2}\ 2p^{4}

C = 1s^{2}\ 2s^{2}\ 2p^{2}

Thus carbon forms double bonds with oxygen:

O = C = O

Now,

We know that double bond comprises of a \sigma\ bond and a \pi \ bond

Since, in the CO_{2}, there are 2 double bonds thus there are 2 \sigma bonds and 2 \pi bonds in the molecules.

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3 years ago
Kinetic theory all matter is composed of​
yawa3891 [41]
The kinetic theory of matter states that all matter is made of small particles that are in random motion and that have space between them. This means that no matter what phase matter is in, it is made of separate, moving particles.
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