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maxonik [38]
3 years ago
5

1. When an emergency vehicle siren approaches you, how does its observed pitch compare to

Physics
1 answer:
Daniel [21]3 years ago
4 0

Answer:

Explanation:

due to doppler's effect, the picth of the siren is loud when it approaches and appears to be far away when it passes

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Consider the expression below. Assume m is an integer. 6m(2m + 18) Enter an expression in the box that uses the variable m and m
Anika [276]
6x2=12m
6x18=108
12m+108
Simplified: m+9 bc 12/12 and 108/12
8 0
4 years ago
In a closed electrical circuit, what visible evidence indicates that energy is flowing?
____ [38]

Answer:

A light bulb lightning up

Explanation:

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Please help me on questions 3 and 6, thank you! :D I'll give brainliest!
Anarel [89]

Answer:

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4 0
3 years ago
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A motor-driven winch pulls a 50.0 kg student 5.00 m up the rope at a constant speed of 1.25 m/s. how much power does the motor u
nadya68 [22]
Power is the rate work done given by dividing work done by unit time. It is measured in watts equivalent to J/s.
In this case the force by the student is mg = 490 N (taking g as 9.8m/s²)
Work done is given by force × distance,
Therefore, Power =(force × distance)/ time, but velocity/speed =distance/time
Thus, Power = force × speed/velocity
                     = 490 N × 1.25
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Hence, power will be 612.5 Watts.
7 0
4 years ago
What is the part of the racquet directly below the head that connects the head to the handle?
4vir4ik [10]
It's called Throat. You can refer the figure attached.

7 0
4 years ago
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