Explanation

• Red stars, also known as red dwarfs, typically have a surface temperature around 3000°C (5400°F).
• This is the coolest temperature range for stars, and it's what gives them their distinctive red color.

Explanation

• The next closest star system to Earth after the Sun is known as Alpha Centauri.
• Specifically, Proxima Centauri, which is part of the Alpha Centauri star system, is the closest individual star to Earth, located approximately 4.24 light-years away.

Explanation

Stars are massive, luminous balls of gas that are primarily composed of:

• Hydrogen (about 70%)
• Helium (about 28%)

Explanation

When an object is placed very close to a concave mirror, its image will be:

• Virtual (not a real image that can be projected onto a screen)
• Upright (not inverted)
• Larger in size than the object (magnified)

Explanation

The equation of Bernoulli's theorem is not related to the turning of a musical instrument. 

Explanation

• Potential energy is a measure of the energy an object has due to its position or state, and it determines how much work the object can perform.
• The amount of potential energy an object has is a function of its mass, height, and other factors.
• It can be converted into kinetic energy (the energy of motion) when the object is released or moved.
• For example, a ball at the top of a hill has a certain amount of potential energy due to its height, and as it rolls down the hill, this potential energy is converted into kinetic energy, allowing the ball to perform work (such as moving down the hill).

Explanation

• Thermal energy is the form of energy that is transferred from one body to another due to a difference in temperature, and is received from heat.
• It is the energy of motion of particles in a substance, such as atoms or molecules, and is often referred to as "heat energy".

Explanation

• Gas Giants are large, gaseous planets that are primarily composed of hydrogen and helium, and include Jupiter, Saturn, Uranus, and Neptune.
• They have no solid surface and are characterized by their massive size and atmospheric composition.

Explanation

• When the child rubs the balloons with wool, the balloons become statically charged with the same type of charge (either positive or negative).
• When two objects with the same charge are brought near each other, they repel each other.

Explanation

• The invention of the Lever is attributed to Archimedes.
• The lever was first described in 260 B.C.E. by Archimedes.