Why didn't the first stars to form have solar systems with Earth like planets and satellites?

Answers

Answer 1

Answer: to be honest,no one probably knows.maybe because of their mass

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Wispy, feathery clouds made mostly of ice crystals that form at high altitudes, usually above 6 kilometers.

Answers

Cirrus clouds are the clouds mostly made of ice becasue of the high altitudes

What force keeps you from falling through your bed when you lie on it to sleep

Answers

I think it has to do with the electrostatic repulsion of the electrons.

There is electrostatic repulsion between your electrons and those of the floor.

student built a simple heat engine that could lift masses. If the heat engine takes in 300 J of heat and loses 50 J to the environment, how much height will it lift a 1.5 kg mass?

Answers

Answer:

So it will lift the mass by h = 17 m

Explanation:

As per energy conservation we know that

$Q_1 = W + Q_2$

here we know that

$Q_1 = 300 J$

$Q_2 = 50 J$

now we have

$W = 300 - 50$

$W = 250 J$

so work done by the engine is 250 J

now we have

$W = mgh$

$250 = 1.5 * 9.81 * h$

$h = 17 m$

At what age is the difference between the average height boys and girls

Answers

Hey There!

The age that determines difference between the average height boys and girls, is 5 to 8.

Have A Brainly Day :)

Starting from rest, Christina experiences 24.5 m/s2 of acceleration to take off from an aircraft carrier for 5 seconds. How long does the runway need to be? Round to the nearest meter.

Answers

Answer:

The length of the runway to the nearest meter is 306 m.

Explanation:

Given:

Initial velocity of Christina is, $u=0\ m/s(Rest)$

Time taken is, $t=5\ s$

Acceleration experienced by Christina is, $a=24.5\ m/s^2$

The length of the runway is, $d=?$

Now, we use Newton's equation of motion that relates the distance, initial velocity, time and acceleration.

So, we have the following equation of motion:

$d=ut+(1)/(2)at^2$

Plug in all the given values and solve for 'd'. This gives,

$d=0+(1)/(2)* 24.5* 5^2\n\nd=(1* 24.5* 25)/(2)\n\nd=(612.5)/(2)\n\nd=306.25\approx 306\ m(\textrm{Rounding to nearest meter})$

Therefore, the length of the runway to the nearest meter is 306 m.

What ismechanical
energy?
A energy of moving electrons
B vibrations of particles of matter
C energy that moves things
D vibrations that move tiny bones in the ear

Help me 30 points

Answers

Answer:

Energy that moves things. Think of your arm grabbing a glass of water. That's a form of mechanical energy because you just moved something.

In physical sciences, mechanical energy is the sum of potential energy and kinetic energy. It is the macroscopic energy associated with a system. The principle of conservation of mechanical energy states that in an isolated system that is only subject to conservative forces, the mechanical energy is constant.

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