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lukranit [14]
4 years ago
11

A student practicing for track ran 800 meter in 110 seconds. what was her speed?

Physics
1 answer:
adoni [48]4 years ago
3 0
Her speed was 7.27 meters per second
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A series circuit has two 10-ohm bulb is added in a series. Technician A says that the three bulbs will be dimmer than when only
ANTONII [103]

Answer:

Technician  A  is right. The situation will happens even with only two bulbs in series

Explanation:

We must take into account that

1.- All electric device need its nominal voltage to operate

2.-Any and all electric device means an electric load for the source in terms of equation that means any device will implies a drop voltage of V = I*R ( I the flows current and R  the resistance of the device)

3.-Nominal voltage for bulbs are specify for houses voltages you find between fase and neutral wires for instance in Venezuela 120 (v).

4.-In a imaginary circuit of only one bulb, the nominal voltage will be applied and the bulb will operates correctly, but when you add another bulb (in series) the nominal voltage will split  between the two bulbs ( we  could find a situation such as the first bulb work properly but the second one does not). The voltage split according to Ohms law (in such way that the sum of voltage between the terminal of the first bulb plus the voltage at terminals of the second one are equal to nominal voltage.

For that reason all the bulbs are connected in parallel in wich case all of them will operate with the common voltage

4 0
3 years ago
What do u mean by free fall?​
Degger [83]

Answer:

Any motion of a body in which gravity is the sole force acting on it is known as free fall. A body in free fall has no force acting on it under general relativity, where gravity is reduced to space-time curvature.

<u></u>

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7 0
3 years ago
Some trees have red leaves all year long. You know that plants with green leaves make their food for themselves. How do you thin
marshall27 [118]
The same way as the trees with green leaves. Through photosynthesis :)
6 0
3 years ago
Read 2 more answers
This part of the electromagnetic spectrum can be used to generate power. (2 points) A: gamma rays B: radio waves C: microwaves D
ANTONII [103]

A) gamma rays

good luck

6 0
3 years ago
A 0.060 kg ball hits the ground with a speed of –32 m/s. The ball is in contact with the ground for 45 milliseconds and the grou
FinnZ [79.3K]

<u>Answer</u>

= 9.25 m/s


<u>Explanation</u>

The Newton's second law of motion states that, the change in momentum is directly propotional to the force producing it and it takes place in the direction of force.

F = ma

f = m(v-u)/t

ft = m(v-u)

∴ 55 × 45/1000 = 0.060(v - -32)

2.475 = 0.06(v + 32)

2.475/0.6 = v + 32

41.25 = v + 32

v = 41.25 -32

= 9.25 m/s

7 0
3 years ago
Read 2 more answers
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