<h3><u>Answer;</u></h3>
Universe, galaxy, solar system, planet, moon
<h3><u>Explanation;</u></h3>
- <u>A galaxy</u>, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core.
- <u>A solar system</u> consists of a star, normally the sun and all of its planets, asteroids, comets and other bodies.
- <u>A planet</u> is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.
- <u>Moons</u> are typically rocky bodies which are in orbit around planets.
Answer:
correct
Explanation:
the atomic number is located top left of the atomic symbol given
Explanation & answer:
Given:
Fuel consumption, C = 22 L/h
Specific gravity = 0.8
output power, P = 55 kW
heating value, H = 44,000 kJ/kg
Solution:
Calculate energy intake
E = C*P*H
= (22 L/h) / (3600 s/h) * (1000 mL/L) * (0.8 g/mL) * (44000 kJ/kg)
= (22/3600)*1000*0.8*44000 j/s
= 215111.1 j/s
Calculate output power
P = 55 kW
= 55000 j/s
Efficiency
= output / input
= P/E
=55000 / 215111.1
= 0.2557
= 25.6% to 1 decimal place.
Answer:
Choice A: approximately , assuming that the two pistons are connected via some confined liquid to form a simple machine.
Explanation:
Assume that the two pistons are connected via some liquid that is confined. Pressure from the first piston:
.
By Pascal's Principle, because the first piston exerted a pressure of on the liquid, the liquid will now exert the same amount of pressure on the walls of the container.
Assume that the second piston is part of that wall. The pressure on the second piston will also be . In other words:
.
To achieve a force of , the surface area of the second piston should be:
.