Mechanics

It floats on water because it is less dense than the water.

mithwin immanuel stanley

Let say you have a pie with one half full of iron and the other half full of cranberries.

The geometric centroid will be the center of the circle since it is the middle of the geometric form

The center of mass is the exact point where you need to put your finger to hold in equilibrium the plate. It will necessarily be on the iron stuffed side since iron is heavier than cranberries thus moving the center of mass towards iron.

An "ideal" projectile trajectory ... without the influence of wind or air resistance ... is a section

of a parabola. That's the figure you get when the horizontal position changes at constant speed

and the vertical position changes at a speed that is itself changing at a constant rate.

-- When the net force on an object is not zero, the object undergoes accelerated motion.

-- The magnitude of the acceleration is the ratio of the net force to the object's mass.

-- The direction of the acceleration is the same as the direction of the net force.

Yes - even though there is an extremely small amount due to the block and air. In the experiment that is usually not taken into account even though strictly speaking it should be

Multivalent ions are just a few ions (like Fe) that have more than one valence. We have no way of telling which one it is when we write the words so we use roman numerals like I and II .

When they are in a formula we can tell which one it is by working backwards and using some deductive reasoning.

So, lets say you have FeCl2

We know that Cl is always -1 so if we have to have 2 chlorines to balance the charge of one Fe then the Fe must be charged +2

That Fe is Iron II

This compound would be written as Iron II chloride.

There are only a few multivalenet ions you will deal with regularly

They are Iron (Fe), Tin (Sn), Mercury (Hg), Copper (Cu), Gold (Au), Manganese (Mn), Lead (Pb), Cobalt (Co), and Chromium (Cr). There is an older way of naming these without the Roman Numerals. Iron II is also called Ferrous and Iron III is ferric. The "ous" and the "ic"suffix tell you the charge. The "ous" ending is always a lower oxidation number than "ic".

Assuming the mass remains constant, the acceleration will be tripled as well.

The word demonstrate does not have a precise opposite, other than "fail to demonstrate" but sometimes we can make a distinction between demonstration and assertion. That is the difference between showing and telling.

about 35 mph

Water and ice are two different phases, or physical states, of the same material (liquid/solid). Each has its own set of physical properties. Three examples are: density, hardness, and molecular arrangement. Each can be converted to the other by adding or removing energy.

The bonds between the molecules in liquid are fewer than those between the molecules in the solid phase. The solid has a characteristic crystalline structure.

by all having the ability to do work, but some may have the ability to do more or less than energy

net force

5 mph is 7.3 feet per second.

That would depend on what style of differential you have, H-190 Differential carrier type, with independent suspension, or full axle leaf spring type. The model of car, age or even country of manufacturing, would be of help to answer this question.

Net torque is the magnitude and direction of torque that is left over when you add up the torques that are acting on an object.

A lever! The most simple would probably be a form of lever, and this may also depend on the actual size of the "heavy rock".

Sure.

-- Three forces all pointing north, each of them = 10 pounds.

-- Two forces both pointing south, each one = 15 pounds.

or

-- One 10-pound force pointing north, one east, one west. (Three forces.)

-- Two forces both pointing south, each = 5 pounds.

There are an infinite number of ways to arrange five forces with the same or different

magnitudes, in different directions such that their vector sum is zero.

Some examples of acceleration are:

1. pushing a book with your hand

2. a moving car

3. pulling a crate along a concrete floor

4. riding a roller coaster

5. a gun shooting out a bullet

A node.

bout 77mph mate

As you bring the source of light closer to the deflector the energy of the loss of energy from the light waves decreases. So the light waves strikes the deflector with greater energy. So more energy is needed to deflect them. Hence the deflection decreases.

work = the exerted force x the distance over which it was exerted

w= f x d

force is measured in newtons (N)

distance is measured in meters (m)

therefore w = M x N a.k.a. joules

Work is measured in Joules (J)

Given mass and force, assuming the force acts continuously on the object throughout the movement and doesn't change direction, you can easily calculate acceleration experienced by body.

a = F / m, where

a is acceleration,

F is force,

m is mass.

You can then use simple formula for distance traveled by body with some initial speed and under constant acceleration:

S = v0t + at2 / 2

Formula comes from integrating linearly increasing speed over time.