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3 years ago

The equation shows neutralization of an acid and a base to produce a salt and water.

Physics

2 answers:

german3 years ago

8 0

Its 2.<- because if you use the balancing thingy it ends up to 2.

Masja [62]3 years ago

6 0

The answer is; 2.

To balance a chemical equation, the moles on one side of the equation has to be the same as that on the other side. This ensures that the law of conservation is observed because matter or energy can't be created or destroyed but can only be transformed from one form to another.

In this equation, putting 2 in front of NaCl ensures that there are 2 moles of Na and CL just as there are 2 moles of Na and CL in the reactants side.

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About ________ percent of wais scores fall between 70 and 130.

stiv31 [10]

It is about 95%. The Wechsler Adult Intelligence Scale-IV is an IQ test that is given by therapists and measures worldwide scholarly working. It incorporates both verbal and nonverbal parts. The normal score for all tests and subtests is 100; therefore, a score of more than 100 is better than expected and beneath 100 is underneath normal.

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4 years ago

How long does it take me to travel 500 m at a speed of 50 m/s?

bazaltina [42]

Answer:

D, 10 seconds

Explanation:

10*50=500

4 0

3 years ago

Read 2 more answers

A 3 kg mass object is pushed 0.6 m into a spring with spring constant 210 N/m on a frictionless horizontal surface. Upon release

Svetradugi [14.3K]

Answer with Explanation:

We are given that

Mass of spring,m=3 kg

Distance moved by object,d=0.6 m

Spring constant,k=210N/m

Height,h=1.5 m

a.Work done to compress the spring initially= $\frac{1}{2}kx^2=\frac{1}{2}(210)(0.6)^2=37.8J$

By conservation law of energy

Initial energy of spring=Kinetic energy of object

$37.8=\frac{1}{2}(3)v^2$

$v^2=\frac{37.8\times 2}{3}$

$v=\sqrt{\frac{37.8\times 2}{3}}$

v=5.02 m/s

c.Work done by friction on the incline, $w_{friction}=P.E-spring \;energy$

$W_{friction}=3\times 9.8\times 1.5-37.8=6.3 J$

8 0

3 years ago

What is the reversal experienced by an image formed in a plane mirror called?

Lerok [7]

Answer:

Lateral inversion

Explanation:

When an object is placed in front of a plane mirror, the appearance of the object on the plane mirror appears as a reversal of the object. This effect is known as lateral inversion.

Lateral inversion occurs as a result of the fact that light is reflected by a plane mirror. The image formed by the plane mirror is as far behind the mirror as the object is in front of it. Hence lateral inversion occurs because of the way our brains perceive images on a plane mirror. The mirror image of symmetrical letters and objects do not show lateral inversion.

4 0

4 years ago

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. Each step is of unifo

fgiga [73]

The definition of gravitational potential energy would gravitate allows to find the answers for the energy of each object on the highest rung of the ladder are:

a) expression for gravitational potential energy is $U_p = m g \ \Delta y$

b) Energy value

* Body 1 U_p = 82 J

* Body 2 U_p = 38.6 J

* Body 3 18.5 J

The gravitational potential energy is a configuration energy that represents the amount of work that the system can do for a given configuration, its expression is

$U_p = m g \ \Delta y$

Where $U_p$ is the gravitational potential energy, m the mass of the body and Δy the difference in height.

In this case it indicates that the minimum height is at the bottom and is equal to zero, the steps of a ladder have a height of approximately y = 15 cm = 0.15 m

They indicate the mass of the bodies are m₁ = 3.10 kg, the mass of the body 2 m₂ = 1.46 kg , the mass of the third object is not observed, suppose it is m₃ = 0.7 kg.

They indicate that the body is placed on the last step, suppose it is a standard 18-step ladder, therefore the total height is

y = # _ steps y_each step

y = 18 0.15

y = 2.70 m

the gravitational potential energy to the capacity of the body is

body 1

$U_p$ = m₁ g Δy₁

U_p = 3.10 9.8 (2.70 -0)

U_p = 82 J

body 2

U_p = 1.46 9.8 ( 2.7-0)

U_p = 38.6 J

body 3

U_pUp = 0.70 9.8 (2.7-0)

U_p = 18.5 J

In conclusion, using the definition of gravitational potential energy, we can find the answers for the energy of each object on the highest rung of the ladder are;

a) expression for gravitational potential energy is $U_p = m g \ \Delta y$

b) Energy value

* Body 1 U_p = 82.0 J

* Body 2 U_p = 38.6 J

* Body 3 U_p = 18.5 J

Learn more here: brainly.com/question/3884855

8 0

3 years ago