1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
babymother [125]
3 years ago
13

Ex1. An atom has atomic number Z = 6 and mass number A = 12. Establish:

Physics
1 answer:
Maksim231197 [3]3 years ago
7 0

Answer:

Ex1.

a) Carbon : atomic number Z = 6 and mass number A = 12

b) Protons = 6; electrons = 6 ; neutrons = 6.

Ex2.

Molar mass of H₂O₂ = 34 g;  BaF = 156 g; CO = 28 g.

Explanation:

Ex1.

a) the element with atomic number 6 and mass number 12 is carbon

b) number of protons and electrons in a element is given by its atomic number; and for neutrons its mass number - atomic number (A-Z).

⇒ protons = Z = 6;  electrons = Z = 6.;   neutrons = A-Z = 12-6 = 6.

Ex2.

Molecular formula of hydrogen peroxide is given by H₂O₂.

⇒ molar mass = 2×mass of hydrogen + 2×mass of oxygen

⇒ molar mass = 2×1 + 2×16 = 34.g

molar mass of BaF = mass of barium + mass of fluoride.

                               = 137 + 19 = 156 g

molar mass of CO = mass of carbon + mass of oxygen

                              = 12 + 16 = 28 g

You might be interested in
A Porsche challenges a Honda to a 400 m race. Because the Porsche's acceleration of 3.4 m/s2 is larger than the Honda's 3.0 m/s2
padilas [110]

Answer:

Winner wins by 0.969 s

Explanation:

For the Porche:

Given:

Displacement of Porsche s = 400 m

Acceleration of Porsche a = 3.4 m/s^2

From Newton's second equation of motion,

s = ut + (1/2) a t^2 (u = 0 as the car was initially at rest)

Substituting the values into the equation, we have

t^2 = (2 * 400) / 3.4

= 235.29 / 3.4

t = 15.33 s

For the Honda:

Displacement of Honda = 310 m

Acceleration of Honda = 3 m/s^2

Applying Newton's second equation of motion

s = ut + (1/2) a t^2 (u = 0 for same reason)

Substituting the values into the equation, we obtain

t^2 = (2 * 310) / 3

= 620 / 3

t = 14.37 s

Hence

The winner (honda) wins by a time interval of = 15.33 - 14.37    

=0.969 s

8 0
3 years ago
The graph in the accompanying figure (Figure 1) shows the magnitude of the force exerted by a given spring as a function of the
serious [3.7K]

The elastic potential energy stored in the stretched spring is 1 J.

<h3>What is Hooke's law?</h3>

Hooke's law states that; provided the elastic limit is not exceeded, the extension of the spring is directly proportional to the force on the spring.

Given that;

Force on the spring = 350 Newton

Distance stretched = 7 centimeters or 0.07 m

Hence;

F = ke

k = F/e = 350 Newton/0.07 m = 5000 N/m

Work done in stretching a spring = 1/2ke^2

= 0.5 × 5000 × (2 × 10^-2)^2 =1 J

Learn more about elastic potential energy: brainly.com/question/156316

4 0
2 years ago
Is it more fun on a swing with low or high amplitude? Explain.
marusya05 [52]
A pendulum is an object hung from a fixed point that swings back and forth under the action of gravity. In the example of the playground swing, the swing is supported by chains that are attached to fixed points at the top of the swing set. When the swing is raised and released, it will move freely back and forth due to the force of gravity on it. The swing continues moving back and forth without any extra outside help until friction (between the air and the swing and between the chains and the attachment points) slows it down and eventually stops it.
7 0
3 years ago
Explain the roles of the sympathetic division and parsympathetic division of the ANS in a fear response.(this is for psychology
tresset_1 [31]

Answer:

The parasympathetic division increases digestive activity and the sympathetic division decreases it. The Sympathetic Division of the ANS is responsible for mobilizing the body in response to situations that are threatening or otherwise exciting.






Explanation:

Have a great rest of your day
#TheWizzer

4 0
2 years ago
Read 2 more answers
What is the advantage of having different shaped beaks? Question 4 options: To protect itself against prey. To be able to eat th
Pavlova-9 [17]

Answer:

To be able to eat the food readily available in the environment

3 0
3 years ago
Other questions:
  • Determine your Maximum Heart Rate (MHR) by subtracting your age from 220.
    15·1 answer
  • In the simple Bohr model of the eighth excited state of the hydrogen atom, the electron travels in a circular orbit around a fix
    5·1 answer
  • The total magnification of a specimen being viewed with a 10X ocular lens and a 40X objective lens is _____.
    10·1 answer
  • An object in free fall travels a distance s that is directly proportional to the square of the time t. If an object falls 1088 f
    10·1 answer
  • Which equation best describes the law of conservation of momentum?
    11·2 answers
  • A 0.500 kg block of lead is heated from 295 K to 350. K. How much heat was absorbed by the lead? (express your answer to the nea
    14·1 answer
  • Choose the correct description of what do we mean when we say that light is an electromagnetic wave and the relationship among w
    8·1 answer
  • Liquid sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633°C and 400.0 torr at 823°C. Calculate
    5·1 answer
  • A single loop of wire with an area of 0.0780 m2 is in a uniform magnetic field that has an initial value of 3.80 T, is perpendic
    5·1 answer
  • you are driving along a country road when you suddenly notice a log in the road ahead of you and immediately apply your brakes.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!