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Umnica [9.8K]
3 years ago
7

Tami is doing experiments on three different unknown solids. She understands that treating them in different manners might resul

t in changes to their bonding, and these changes may help her identify unknowns. She treats samples of each solid four different ways: heating them, letting them cool, shining bright light on them, and hitting them once with a hammer. The chart shows what happened to each sample.
Answer Quickly Please
Based on how they each acted in the trials, which substance(s) would most likely be metallic?

A and B
B
C
A and C
Physics
2 answers:
bekas [8.4K]3 years ago
5 0
Based on how they each acted in the trials, the substance that would be the most metallic is B.

VladimirAG [237]3 years ago
3 0

Answer:

the answer is b

Explanation:

you just got the answer right!

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Indiana Jones is in a temple searching for artifacts. He finds a gold sphere with a radius of 2 cm sitting on a pressure sensiti
Vlad1618 [11]

Answer:

Volume of Sand = 0.4 m³

Radius of Sand Sphere = 0.46 m

Explanation:

First we need to find the volume of gold sphere:

Vg = (4/3)πr³

where,

Vg = Volume of gold sphere = ?

r = radius of gold sphere = 2 cm = 0.02 m

Therefore,

Vg = (4/3)π(0.2 m)³

Vg = 0.0335 m³

Now, we find mass of the gold:

ρg = mg/Vg

where,

ρg = density of gold = 19300 kg/m³

mg = mass of gold = ?

Vg = Volume of gold sphere = 0.0335 m³

Therefore,

mg = (19300 kg/m³)(0.0335 m³)

mg = 646.75 kg

Now, the volume of sand required for equivalent mass of gold, will be given by:

ρs = mg/Vs

where,

ρs = density of sand = 1602 kg/m³

mg = mass of gold = 646.75 kg

Vs = Volume of sand = ?

Therefore,

1602 kg/m³ = 646.75 kg/Vs

Vs = (646.75 kg)/(1602 kg/m³)

<u>Vs = 0.4 m³</u>

Now, for the radius of sand sphere to give a volume of 0.4 m³, can be determined from the formula:

Vs = (4/3)πr³

0.4 m³ = (4/3)πr³

r³ = 3(0.4 m³)/4π

r³ = 0.095 m³

r = ∛(0.095 m³)

<u>r = 0.46 m</u>

4 0
3 years ago
Increasing the concentration and increasing the temperature both increase reaction rates based on which physical phenomenon? 1.
vekshin1
You can deal with this question using the collision theory, which states that the chemical reactions occur when particles collide with enough energy to reach the Activation Energy.

The velocity of the particles is related with the temperature. At higher temperatures,  higher velocities and higher frequency of collisions.

Also, at higher concentration (more particles is a same volume) the number of collisions will increase.

Then, hIgher concentration and higher temperature will increase the frequency of the molecular collisions..

Then, the answer is the proposal #1: "<span>increasing the frequency of molecular collisions"</span>
 

5 0
3 years ago
Read 2 more answers
Parallel conducting wires carrying currents in the same direction repel each other.
S_A_V [24]

Answer:

False

Explanation:

The direction of magnetic field on a current carrying conductor can be determined by the Fleming's right hand rule where

  • The thumb represents the direction of motion
  • the index finger represents the direction of field.
  • The middle finger is the direction of induced current.

When two conductors carrying currents flowing in opposite direction, the magnetic field will be in the same direction hence they will repel.

<u><em>When the currents in them flow in same direction, then it means the magnetic field will be opposition and there will be a force of attraction between the conductors.</em></u>

4 0
3 years ago
Convert 6.8 gallons into liters
poizon [28]
25.7408 liters. There are 3.78541 liters in one gallon
4 0
4 years ago
Se lanza una pelota de hule elástica de masa mA con una velocidad VAi contra la puerta trasera de un camión muy pesado de masa m
miv72 [106K]

Answer:

v_{A}=v_{Ai}

Explanation:

The total momentum of the system must conserve by the law of momentum conservation.

p_b=p_a\\\\m_Av_{Ai}+m_Bv_{Bi}=m_Av_{A}+m_Bv_{B}    ( 1 )

If you consider the shock between the ball and the truck as totally elastic, and also if the truck is much more massive than the ball, you can assume that the truck does not move when the ball hits it.

Then the truck is always at rest

Hence, you have in the expression ( 1 ):

m_Av_{Ai}+0=m_Av_{A}+0\\\\v_{Ai}=v_{A}

3 0
3 years ago
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