2 years ago

Question 19 D

Physics

1 answer:

Elena L [17]2 years ago

6 0

The answer of this question would be D

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Maru [420]

More energy, colour and I think less bright

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2 years ago

Definition for compression and rarefraction

s344n2d4d5 [400]

Compression and rarefaction are two phenomenon occurs in longitudunal wave!

when there is denser particle gathering in that wave , there we called it compression and the rarer part of particles is rarefaction !

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2 years ago

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A ball is thrown vertically upward from the top of a building 112 feet tall with an initial velocity of 96 feet per second. The

nordsb [41]

Answer:

$t=6.96s$

Explanation:

From this exercise, our knowable variables are hight and initial velocity

$v_{oy}=96ft/s$

$y_{o}=112ft$

To find how much time does the ball strike the ground, we need to know that the final position of the ball is y=0ft

$y=y_{o}+v_{oy}t+\frac{1}{2}gt^{2}$

$0=112ft+(96ft/s)t-\frac{1}{2}(32.2ft/s^{2})t^{2}$

Solving for t using quadratic formula

$t=\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

$a=-\frac{1}{2} (32.2)\\b=96\\c=112$

$t=-0.999s$ or $t=6.96s$

Since time can't be negative the answer is t=6.96s

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2 years ago

1. Different amount of energy is transferred to different parts of an electric circuit. *

Evgesh-ka [11]

Answer:

True

Explanation:

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A roller coaster takes energy to make the first rise, but then it should be able to run the course of the track without any inpu

den301095 [7]

I would say that this is the first law of thermodynamics.

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