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Marysya12 [62]
4 years ago
8

Which change will decrease the speed of a sound wave traveling through a gaseous matter?

Physics
2 answers:
weeeeeb [17]4 years ago
5 0

Answer:

lower pressure, because atoms/molecules need to travel a distance to affect neighboring particles

san4es73 [151]4 years ago
5 0

i believe the answer is decreasing the temperature of the matter

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If a 54 kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3 s, what average power is generated?
lora16 [44]

Answer:

Power, P = 600 watts

Explanation:

It is given that,

Mass of sprinter, m = 54 kg

Speed, v = 10 m/s

Time taken, t = 3 s

We need to find the average power generated. The work done divided by time taken is called power generated by the sprinter i.e.

P=\dfrac{W}{t}

Work done is equal to the change in kinetic energy of the sprinter.

P=\dfrac{\dfrac{1}{2}mv^2}{t}

P=\dfrac{\dfrac{1}{2}\times 54\ kg\times (10\ m/s)^2}{3\ s}

P = 900 watts

So, the average power generated by the sprinter is 900 watts. Hence, this is the required solution.

3 0
3 years ago
Force vectors P and Q have magnitudes of 30 N and 50 N respectively. Which of the following is NOT a possible answer for the mag
Thepotemich [5.8K]

30 N can not be a possible answer for the magnitude of the resultant of these vectors.

<h3>Resultant vector</h3>

The term resultant vector refers to the result obtained when two or more vectors are combined in magnitude and direction. It is that singular vector that has the same effect in magnitude and direction as two or more vectors acting together.

The resultant vector can not be be obtained algebraically rather it must be obtained geometrically. Hence, 30 N can not be a possible answer for the magnitude of the resultant of these vectors.

Learn more about resultant vector:brainly.com/question/24802757

6 0
3 years ago
What is the mass of a crane that has a weight of 697,005.40N?
igomit [66]

Explanation:

hope this helps you out if not im sorry

6 0
3 years ago
a stone is thrown vertically upwards with a velocity of 20 m per second determine the total time of flight of stone in air​
miv72 [106K]

Answer:

Explanation:

The best way to do this is to remember the rule about the halfway mark in a parabolic path. At a trajectory's half way point in its travels, it will be at its max height. To get the total time in the air, we take that time at half way and double it. Here's what we know that we are told:

initial velocity is 20 m/s

Here's what we know that we are NOT told:

a = -9.8 m/s/s and

final velocity is 0 at an object's max height in parabolic motion.

We will use the equation:

v=v_0+at where v is final velocity and v0 is initial velocity. Filling in:

0 = 20 + (-9.8)t and

-20 = -9.8t so

t = 2 seconds. The stone reaches its max height 2 seconds after it is thrown; that means that after another 2 seconds it will be on the ground. Total air time is 4 seconds.

8 0
3 years ago
What does your ecological foot print tell you?
shepuryov [24]

Answer:

How big your foot is. (Big Brain)

Explanation:

3 0
4 years ago
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