D) Move farther apart from one another. Sublimation is when a solid changes to a gaseous state. The particles that were tightly compact into a solid are released and spread away from eachother into the air as a gas.
Answer:
Potential energy is the energy that exists by virtue of the relative positions (configurations) of the objects within a physical system.
This form of energy has the potential to change the state of other objects around it, for example, the configuration or motion.
Various forms of energy can be grouped as potential energy.
Each of these forms is associated with a particular kind of force acting in conjunction with some physical property of matter (such as mass, charge, elasticity, temperature etc).
For example, gravitational potential energy is associated with the gravitational force acting on object's mass; elastic potential energy with the elastic force (ultimately electromagnetic force) acting on the elasticity of a deformed object; electrical potential energy with the coulombic force; strong nuclear force or weak nuclear force acting on the electric charge on the object; chemical potential energy, with the chemical potential of a particular atomic or molecular configuration acting on the atomic/molecular structure of the chemical substance that constitutes the object; thermal potential energy with the electromagnetic force in conjunction with the temperature of the object.
For an example of gravitational potential energy, consider a book placed on top of a table.
To raise the book from the floor to the table, work must be done, and energy supplied. (If the book is lifted by a person then this is provided by the chemical energy obtained from that person's food and then stored in the chemicals of the body.) Assuming perfect efficiency (no energy losses), the energy supplied to lift the book is exactly the same as the increase in the book's gravitational potential energy.
The book's potential energy can be released by knocking it off the table.
As the book falls, its potential energy is converted to kinetic energy.
When the book hits the floor this kinetic energy is converted into heat and sound by the impact.
Explanation:
Answer:
Simple answer: Yes
Explanation:
Even if you touch an item with a stick you re still doing work to it, most of the time something sitting on a table not being disturbed is having work done to it. Everything has the force of gravity working on it to essentially keep the items from floating away so workis being done to it.
Work done can be something so small (e.g) a pencil sitting on a table) or as big as an earthquake or kicking a ball through a window and smashing the glass.
Answer:
A) τ = 1,222 10⁻⁶ N m
, B) w = 0.24 rad / sec
, v = 2.88 10⁻³ m / s
Explanation:
Part A
We can get the torque
τ= F x r
bold are vector
τ = F r sin θ
Let's use according to Newton's law
F - W = 0
F = mg
τ = mg r sin θ
Let's reduce the magnitudes to the SI system
m = 12 ug = 12 10⁻⁶ kg
r = 12 mm = 12 10⁻³ m
Let's calculate
τ = 12 10⁻⁶ 9.8 12 10⁻³ sin 60
τ = 1,222 10⁻⁶ N m
Part B
Let's use Newton's law for rotational movement
τ = I α
The moment of inertia of the antero that we approximate as a particle is
τ = m r² α
α = τ / m r²
α = 1,222 10⁻⁶ / (12 10⁻⁶ (12 10⁻³)²)
α = 0.70718 10³ rad / s²
Angular velocity is
w = w₀ + α t
w = 0 + 0.70718 10³ 0.34 10⁻³
w = 0.24 rad / sec
Angular and linear variables are related.
v = w r
v = 0.24 12 10⁻³
v = 2.88 10⁻³ m / s
Answer:
1) Magnesium metal/magnesium ion
2) Aluminum/aluminum ion
3) Copper metal/copper(l) ion
Explanation:
The activity series is a series that shows the ease of reactivity of substances in an electrochemical cell.
The substances that are higher up in the series are more reactive in electrochemical cells.
Magnesium is the first element in the series that has the most negative redox potential then followed aluminium.
Hence, according to Nernst,
1) Magnesium metal/magnesium ion
2) Aluminum/aluminum ion
3) Copper metal/copper(l) ion