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4 years ago

How are changes in matter related to changes in energy

2 answers:

7 0

The ability to do work or cause change.
Every chemical and physical change in matter includes a change in energy.
Energy is conserved in a chemical change.
Energy is never created or destroyed.
Energy is only transformed from one form to another.

seraphim [82]4 years ago

3 0

If the state of matter is a solid and transforms into a liquid,then the energy level is increased and if it is going from a liquid to a solid the energy level is decreased

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A 1.94-m-diameter lead sphere has a mass of 5681 kg. A dust particle rests on the surface. What is the ratio of the gravitationa

scoundrel [369]

To develop this problem we will apply Newton's laws regarding gravitational forces, both in space and on earth. From finding this relationship, leaving the variable of the dust mass open, we will find the relationship of the forces between the two surfaces. Our values are,

$\text{Diameter of the lead sphere} = D=1.940m$

$\text{Mass of the lead sphere} = m_1 = 5681kg$

$\text{Mass of the dust particle} = m_2$

Distance between the center of lead sphere to dust particle

$r = \frac{D}{2}$

$r = \frac{1.940m}{2}$

$r = 0.97m$

Gravitational force of the sphere on the dust particle:

$F = \frac{Gm_1m_2}{r^2}$

$F = \frac{(6.67*10^{-11}N\cdot m^2/kg^2)(5681kg)(m_2)}{(0.97m)^2}$

$F = (4.027*10^{-7} N/kg)m_2$

Weight of the dust particle

$W = m_2 g$

$W = m_2 (9.8m/s^2)$

Ratio of F and W:

$\frac{F}{W} = \frac{(4.07*10^{-7}N/kg) m_2)}{m_2(9.8m/s^2)}$

$\frac{F}{W} = 4.153*10^{-8}$

Therefore the ratio is $4.153*10^{-8}$

3 0

3 years ago

The modern periodic table is arranged in order of increasing atomic

tankabanditka [31]

The periodic table is in increasing atomic mass. Hope this helped.

7 0

3 years ago

Read 2 more answers

* 1 po What are the health benefits of having muscular strength and endurance?

CaHeK987 [17]

Answer:

i can`t help without showing me the choses

Explanation:

3 0

3 years ago

Which statement best explains why the overall charge on an atom is zero?

aalyn [17]

A: The positive charge if the protons in the nucleus equals the negative charge in the electron cloud.

Protons are positive, electrons are negative, and neutrons have no charge/are neutral

3 0

3 years ago

A race car moves along a circular track at a speed of 0.512 m/s. If the car's centripetal acceleration is 15.4 m/s2, what is the

tiny-mole [99]

Answer:

The radius is $r = 0.0170 \ m$