2. Matter can be described and classified by its observable properties. One property of solids, liquids, and gasses is they all have volume. Which statement best defines the volume of an object? A. The amount of space that matter occupies
B. The amount of matter in an object
C. The measure of the force of gravity on an object
D. The number of grams in one cubic centimeter
3.When matter changes from a solid to liquid or from liquid to gas, what kind of change takes place?
A. Chemical change
B. Physical change
C. Thermal change
D. Energy change
4. Darius tears a page of newspaper into pieces to start a campfire. What kind of changes taking place as the paper is torn?
A. A change in matter
B. A change in the substance
C. A change in physical property
D. A change in chemical property
5. Mina is attending cooking school, where she prepares a different mixtures of ingredients. She works with homogenous and homogenous mixtures. Today she is using honey and salsa. What kind of mixtures are these ingredients?
A. Neither is a mixture.
B. They’re both homogenous
C. One is homogenous and the other is heterogeneous.
D. They are both heterogeneous.
When a substance has large or strongly extracted particles, they do not flow freely. For example, water flows very quickly compared to honey. Which property of liquids does the example illustrate?
A. Surface tension
B. viscosity
C. Amorphousness
D. Crystallinity

43.452

step-by-step explanation:

284 times .153 = 43.452

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j