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3 years ago

13

6. What disadvantages or pitfalls might be associated with using a fa ce book classroom page? Name at least two and discuss why

each could be considered a disadvantage.

1 answer:

Novosadov [1.4K]3 years ago

4 0

Answer:

poultion and canser

Explanation:

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Calculate the missing variable....

OlgaM077 [116]

Answer:

option b

Explanation:

from the given formula, s=d/t

make t the subject of the formula we have

t=d/s

5/100

0.5

6 0

3 years ago

A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below the Earth’s surface. W

mezya [45]

<h2>Answer: an underground lake</h2>

Explanation:

In general, sound (mechanical waves) travels faster in solids than in liquids, and faster in liquids than in gases. This is because <u>the speed of the mechanical waves is determined by a relationship between the elastic properties of the medium </u>in which they are propagated and the mass per unit volume of the medium (that is:<u>density</u>).

In other words: The speed of sound varies depending on the medium through which the sound waves travel.

So, if we are told the sound wave initially had a speed of 4,000 m/s and it suddenly decreases to 1,500 m/s, this means the sound waves passed from a solid medium to a liquid medium.

Hence, the correct option is: an underground lake.

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3 years ago

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Eli rolled a ball down the cement sidewalk as hard as he could. The ball rolled for less than a minute before it came to a stop.

xeze [42]

The answer is C. friction, acting in opposition to the motion of the ball

6 0

3 years ago

Two planets have the same surface gravity, but planet b has twice the radius of planet

vampirchik [111]

Planet A;
m = the mass
Let r = the radius

Planet B:
Let M = the mass
The radius is 2r (twice the radius of planet A)

The surface gravitational acceleration of planets A and B (they have the same surface gravity) are
$g= \frac{Gm}{r^{2}} \, and \, g= \frac{GM}{(2r)^{2}} \\\\ m= \frac{M}{4} \\\\ M=4m$

Answer: The mass of planet B is 4m.

3 0

3 years ago

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What is the final speed of a lion initially running at a speed of 30 m/s, if it accelerates at

cricket20 [7]

The final speed of a lion running 30 m/s accelerates at a rate of 3 m/s3 for 5 seconds it’s 3.2

8 0

3 years ago