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4 years ago

Ken’s prediction for December was –5°C.

2 answers:

6 0

Answer: ALL U NEED TO DO IS SUBTRACT SO THE ANSWER IS.............................................................................................................................................-2 WAA HOO PLS LEAVE 5 STARZ AND THANK

Veronika [31]4 years ago

5 0

Answer:

-2 degrees

Explanation:

just subtract

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A rocket burns fuel at a rate of 199 kg/s and exhausts the gas at a relative speed of 9 km/s. Find the thrust of the rocket. Ans

andreyandreev [35.5K]

Answer:

1.791 MN

Explanation:

Thrust of the rocket can be found using the relation

T = v.dm/dt, where

T = thrust off the rocket

v = speed of the rocket, 9 km/s = 9000 m/s

dm/dt = rate at which fuel burns, 199 kg/s

Substituting the values into the formula, we have

T = 9000 * 199

T = 1791000 N

T = 1.791*10^6 N

Since 1 MN = 10^6, thus

T = 1.791 MN

7 0

3 years ago

a sound wave travels at 330 m/sec and has a wavelenght of 2meters. calcuate the frequency and period

Sergio039 [100]

The frequency of any wave is (speed) / (wavelength).

Frequency = (330 m/s) / (2m) = 165 per second = <em>165 Hz</em>.

Period = 1 / frequency = 1 / (165 per second) = <em>0.0061 second </em>

7 0

3 years ago

The parallel axis theorem relates Icm, the moment of inertia of an object about an axis passing through its center of mass, to I

erma4kov [3.2K]

Answer:

Part a)

$I_{end} = \frac{mL^2}{3}$

Part b)

$I_{edge} = \frac{2ma^2}{3}$

Explanation:

As we know that by parallel axis theorem we will have

$I_p = I_{cm} + Md^2$

Part a)

here we know that for a stick the moment of inertia for an axis passing through its COM is given as

$I = \frac{mL^2}{12}$

now if we need to find the inertia from its end then we will have

$I_{end} = I_{cm} + Md^2$

$I_{end} = \frac{mL^2}{12} + m(\frac{L}{2})^2$

$I_{end} = \frac{mL^2}{3}$

Part b)

here we know that for a cube the moment of inertia for an axis passing through its COM is given as

$I = \frac{ma^2}{6}$

now if we need to find the inertia about an axis passing through its edge

$I_{edge} = I_{cm} + Md^2$

$I_{edge} = \frac{ma^2}{6} + m(\frac{a}{\sqrt2})^2$

$I_{edge} = \frac{2ma^2}{3}$

7 0

4 years ago

G summarize what you know about how changes in frequency and amplitude determine the characteristics

Slav-nsk [51]

Answer:

Loudness and pitch are the characteristics of a sound related to amplitude and frequency.

Explanation:

Loudness and pitch are the characteristics of a sound that are related with the frequency and amplitude of a sound. If any change occurs in the frequency and amplitude of a sound, change also occurs in the loudness and pitch of a sound. If a source has larger amplitude so it produces large loudness or volume of a sound. On the other hand when the frequency is higher than the pitch will also be higher and the sound produce will be high.

5 0

3 years ago

Which chamber of the heart receives blood with sugar and high oxygen levels from the lungs? A. left atrium B. right atrium C. le

Olin [163]

Answer:

left atrium

Explanation:

its the first chamber of the heart to receive oxygenated blood from the lungs

8 0

4 years ago