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3 years ago

How can you determine an object mechanical energy

2 answers:

7 0

Objects have mechanical energyif they are in motion and/or if they are at some position relative to a zero potential energy position (for example, a brick held at a vertical position above the ground or zero height position). A moving car possesses mechanical energydue to its motion (kineticenergy).

AlexFokin [52]3 years ago

7 0

Kinetic energy + potential energy
KE=1/2mv^2
PE=M*G*H

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damaskus [11]

Mostly in my opinion I think it’s the secound one

8 0

3 years ago

How would having too much sample in the melting point tube most likely affect the melting point measurement? Select the correct

oksano4ka [1.4K]

Answer:

2-4 mm height of capillary tube.

Explanation:

Sample should be around 2-4 mm in height.

It should be packed well so that it does not have air packets that caues the lowering of melting point.

If you take greater amount, then there will be needed more heat, resulting a wide range of melting point.

7 0

3 years ago

Question<br> What is the molarity of a 400 mL solution containing 0.60 moles of NaCl?

Mumz [18]

Answer:

0.24 M

Explanation:

Molarity = Moles solute / Liters solution

Step 1: Identify variables

400 mL = Liters solution

0.60 moles = Moles solute

Step 2: Identify conversions

1 L = 1000 mL

Step 3: Convert mL to L

400mL(1 L/1000mL) = 0.4 L

Step 4: Find molarity

M = (0.4 L)(0.60 mol) = 0.24 M

6 0

3 years ago

In which medium does sound travel the slowest?

ZanzabumX [31]

Sound actually travels slower in air.This is because sound is kinetic energy and has to pass from molecule to molecule.In gas the molecules are farther apart taking more time for it to pass,in water the molecules are closer so it takes less time for the sound to get from one molecule to another and with cast iron (since it's very dense) the molecules are very close allowing sound to travel quickly with ease.

5 0

3 years ago

Read 2 more answers

An unknown metal cylinder has a mass of 34.3 g and a volume of 2.1 mL . What is the density of the metal in g / m * L ?

saul85 [17]

Taking into account the definition of density, the density of the metal is 16.33 $\frac{g}{mL}$ .

<h3>Definition of density</h3>

Density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

$density=\frac{mass}{volume}$

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

<h3>Density of the metal in this case</h3>

In this case, you know that:

Mass= 34.3 g
Volume= 2.1 mL

Replacing in the definition of density:

$density=\frac{34.3 g}{2.1 mL}$

Solving:

<u><em>density= 16.33 </em></u> $\frac{g}{mL}$

In summary, the density of the metal is 16.33 $\frac{g}{mL}$ .

Learn more about density:

<u>brainly.com/question/952755?referrer=searchResults</u>

<u>brainly.com/question/1462554?referrer=searchResults</u>

6 0

2 years ago