Category: Physics

Why does a feather have more air resistance? The elephant and the feather are each being pulled downward due to the force of gravity. When initially dropped, this force of gravity is an unbalanced force. The more air molecules which an object collides with, the greater the air resistance force. Does height affect air resistance? […]

What planet is the hottest in the solar system? Venus Which celestial bodies have one or more moons? Read More Planet / Dwarf Planet Confirmed Moons Total Jupiter 53 79 Saturn 53 82 Uranus 27 27 Neptune 14 14 What if an asteroid hit the ocean? When an asteroid hits the ocean, it’s more likely […]

Why Ptolemy is wrong? Ptolemy’s next error was to neglect the non-uniform rotation of the superior planets on their epicycles. This is equivalent to neglecting the orbital eccentricity of the earth (recall that the epicycles of the superior planets actually represent the earth’s orbit) compared to those of the superior planets. Why the geocentric model […]

Is copper FCC or BCC? Table 1: Crystal Structure for some Metals (at room temperature) Aluminum FCC FCC Cadmium HCP BCC Copper FCC HCP Gold FCC BCC Iron BCC HCP Is BCC or FCC stronger? Because FCC atoms are arranged more closely together than BCC atoms, FCC metals will tend to be more dense and […]

What is the angle of elevation of Shadow? i.e., angle of elevation, θ=30∘. Thus, the angle of elevation of the sun when the length of the shadow of a person is equal to √3 times his height is 30∘. How do you solve for the angle of elevation? Find the angle of elevation of the […]

How far should power pole be from house? Wiring between disconnect box and breaker panel does not have to be buried if the pole is installed within one foot of home’s perimeter. Maximum distance from perimeter of home to meter pole is 30′. What is the distance between two transmission towers? To install transmission towers, […]

What is the only liquid that is not wet? A product called “Sapphire” used in fire-fighting is a liquid “that is not wet”. Answer has 3 votes. Rock is a liguid that has lost its ability to flow (lava) just like glass. It is now known as a solid. What isn’t a liquid? Oobleck and […]

Does hydrochloric acid turn turmeric red? Answer. Turmeric is a good indicator of acids and bases. It turns red in bases whereas it is yellow in both acids and neutral solutions. Hydrochloric acid and sugar solution keep turmeric in yellow colour. What does Zn HCl produce? When zinc reacts with hydrochloric acid it produces zinc […]

How do you find vertical angles examples? Example: Find angles a°, b° and c° below: Angles a° and c° are also vertical angles, so must be equal, which means they are 140° each. Answer: a = 140°, b = 40° and c = 140°. Note: They are also called Vertically Opposite Angles, which is just […]

How do you calculate the power of a hydraulic pump? Hydraulic power is defined as flow multiplied by pressure. The hydraulic power supplied by a pump is: Power = (P x Q) ÷ 500 – where power is in kilowatts [kW], P is the pressure in bars, and Q is the flow in litres per […]