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3 years ago

The kinetic energy of the air molecules inside the cave is the kinetic energy of the air molecules outside the cave.

Physics

2 answers:

larisa [96]3 years ago

7 0

Answer: The correct answer is less than

Explanation:

NISA [10]3 years ago

5 0

Answer:

less then

Explanation:

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What is the energy of an electromagnetic wave that has a frequency of 5.0 x 10⁵ Hz?

Valentin [98]

Answer: 3.3 x 10^-28 J

Explanation: just answered on a quiz!! :)

5 0

3 years ago

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

7 0

3 years ago

NEED HELP ASAP

kakasveta [241]

Answer:

Wavelength!

Explanation:

At least I think? Or wavelength might be crest to crest! Sorry if I'm incorrect. Let me know how I did!

8 0

3 years ago

A 41.0 kg child swings in a swing supported by two chains, each 2.98 m long. (a) If the tension in each chain at the lowest poin

Alex777 [14]

Answer:695.5 N

Explanation:

mass of child $m=41 kg$

Length of chain $L=2.98 m$

Tension in each chain $T=348 N$

(a)Tension at bottom point $T=348 N$

At lowest Point

$T+T-mg=\frac{mv^2}{L}$

$2T-mg=\frac{mv^2}{L}$

$2\times 348-41\times 9.8=\frac{41\times v^2}{2.98}$

$v^2=\frac{294.2\times 2.98}{41}$

$v=\sqrt{21.38}=4.62 m/s$

(b)Force exerted by Seat will be Equal to Normal reaction

$N-mg=\frac{mv^2}{L}$

$N=mg+\frac{mv^2}{L}$

$N=41\times 9.8+\frac{41\times 21.38}{2.98}$

$N=695.95 N$

8 0

3 years ago

The ideal gas model is valid if which of the following conditions is true?

VashaNatasha [74]

in ideal gas we have few things that we need to follow as following

1. Force of interaction between gas molecules are negligible.

2. There is no effect of gravity on them

3. All collisions are perfectly elastic collision.

4. there will be no energy loss

5. All newton's law are valid for them.

6. all molecules moves with same speed in random direction.

So here in order to follow all above conditions we have to maintain low pressure and high temperature in the gas due to which the density of gas becomes low.

So correct answer will be

The gas density is low and the temperature is high.

3 0

3 years ago