How many potassium atoms are in 2 K2CO3?

Answers

Answer 1

Answer: (2× 19 ) + (2 × 19 ) = 76

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If you ride an elevator moving forward with a constant speed, is your apparent weight same,greater than or less than your weight?
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A single star in the process of forming starts by spinning slowly (while it is quite large and relatively cool.) As the star collapses under the pull of its own gravity, its size decreases. As a result, its rate of spinning:_____.
An oil tanker, initially traveling west at 18 km/h is accelerated uniformly until it is traveling east at 21.6 km/h. The acceleration is 0.20 m/s2 towards the east. Compute the total displacement from the tanker’s initial position.Answer in meters.
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Mary walked north from her home to Sheila's home, which is 4.0 kilometers away. Then she turned right and walked another 3.0 kilometers to the supermarket, which is 5.0 kilometers from her own home. She walked the total distance in 1.5 hours. What were her average speed and average velocity?

Answers

The answer is speed: 4.7 km/h, velocity: 3.3 km/h.

Distances and time are given:
d1 = 4 km
d2 = 3 km
d3 = 5 km
t = 1.5 h

The speed can be expressed as a distance (d) divided by time (t). The average speed (s) is total distance travelled divided by time:
s = (d1 + d2)/t = (4+3)/1.5 = 7/1.5 = 4.7 km/h

The average velocity (v) is total displacement (d₁) from the starting point divided by time. Since Mary's starting point was home, and she walked to the supermarket, which is 5.0 kilometers from her own home, her displacement is 5 km:
v = d₁/t = 5/1.5 = 3.3 km/h

Answer:

Explanation:

THE EXPERT IS WRONG IT IS

4.6 and 3.3

Is it true or false that wave interference only occurs with transverse waves?

Answers

i am not 100% sure but i think it is true.

An electromagnet is a device in which moving electric charges (current) in a coil of wire create a magnet. What’s one advantage of using electromagnets in devices? A Electromagnets have a strong, constant magnetic field. B Electromagnets are more powerful than permanent magnets. C Electromagnets don’t need a source of electricity to work. D Electromagnets can easily be turned on and off.

Answers

The electromagnet can be adjusted for having different levels of magnetic fields by turning it on and off. Hence, option (D) is correct.

What is an Electromagnet?

Electromagnets are made by winding a wire through a magnetic material such as a soft iron core making a coil and then passing an electric current through the coil thus making the soft iron core magnetic.

The characteristics of electromagnets are as follows -

The strength of the electromagnet depends on the number of coils and also the size of the electric current through the coil.
Permanent or regular magnets on the other hand do not require power but depend on the type of material used to make it.
It is advantageous to use electromagnets as compared to using permanent magnets since the strength of the electromagnet can be easily adjusted by regulating the amount of current flowing through the coils.

Thus, we can conclude that the electromagnet can be adjusted for having different levels of magnetic fields by turning it on and off. Hence, option (D) is correct.

Learn more about the Electromagnets here:

brainly.com/question/13803241

Answer;

D Electromagnets can easily be turned on and off.

Explanation;

Electromagnets are made by winding a wire through a magnetic material such as soft iron core making a coil, and then passing electric current through the coil thus making the soft iron core magnetic.
The strength of the electromagnet depends on the number of coils and also the size of the electric current through the coil.
Permanent or regular magnets on the other hand do not require power but depends on the type of material used to make it.
Therefore, its advantageous to use electromagnets as compared to using permanent magnets since the strength of the electromagnet can be easily adjusted by regulating the amount of current flowing through the coils. Thus, the electromagnet can be adjusted for have different levels of magnetic fields.

The earth system concept emphasizes which of the following? Question 2 options: how everything on the earth is interconnected how you can study each system in isolation the concept that the earth is round how the earth's systems came about

Answers

The earth system concept emphasizes on how everything on the earth is interconnected. Earth system in terms of four central components known as the subsystems – the hydrosphere,geosphere, atmosphere and biosphere. I hope the answer helps. Thanks!

2x+4y
GCF for the polynomial