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3 years ago

Last one I swear, 50 points again! plz help this is schoolwork

2 answers:

8 0

It is a stretch of the atmosphere ranging from the upper mesosphere to the lower parts of the thermosphere. It’s useful to us in radio communication.

shutvik [7]3 years ago

6 0

Answer:

Where is the ionosphere, and what makes it useful to us? The ionosphere is a stretch of the atmosphere ranging from the upper mesosphere to the lower parts of the thermosphere. It is useful to us in radio communication, as radio signals can bounce off of it to extend their range

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A shell is fired from the ground with an initial speed of 1.60 × 103 m/s (approximately five times the speed of sound) at an ini

Volgvan

Answer:

The horizontal range will be $2.55\times 10^5m$

Explanation:

We have given initial speed of the shell u = $1.6\times 10^3m/sec$

Angle of projection = 51°

Acceleration due to gravity $g=9.8m/sec^2$

We have to find maximum range

Horizontal range in projectile motion is given by

$R=\frac{u^2sin2\Theta }{g}=\frac{(1.60\times 10^3)^2sin(2\times 51^{\circ})}{9.81}=2.55\times 10^5m$

So the horizontal range will be $2.55\times 10^5m$

6 0

3 years ago

Convert the following to second <br> 1minute

Leona [35]

Answer:

60 seconds

Explanation:

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3 0

3 years ago

Read 2 more answers

After a neutral object loses 2 electrons, it will have a

Zepler [3.9K]

Answer:

the measured charge will be -2 elementary charges.

Explanation:

8 0

2 years ago

Read 2 more answers

How much force must a 40,000 W engine exert to get a car up to 75 m/s?<br>Edit: Answer - 533N

kkurt [141]

Answer:

Force = 533.33N

Explanation:

Given the following data;

Power = 40000watt

Velocity = 75m/s

To find the force;

$Power = force * velocity$

Making force the subject of formula, we have;

$Force = \frac {Power}{velocity}$

$Force = \frac {40000}{75}$

Force = 533.33N

4 0

3 years ago

How big does a rock need to be to be called a boulder?

Veseljchak [2.6K]

A rock would be defined as specks of the earths crust formed over years of pressure and hot temperatures. They are mostly filled with minerals and and other components. A boulder would be defined as a large detached mass of rock. A boulder would fall in-between the largest rock on the mountain and the smallest. So technically a boulder is formed through a giant mass of earth that stays connected as it detaches itself from whatever, a rock would just be small pieces of it.

4 0

3 years ago