An element becomes a positively charged ion when itloses protons.
loses electrons.
gains electrons.
gains neutrons.
Answers
An element becomes a positively charged ion when it losses electron.
What is electric charge?
Charged material experiences a force when it is exposed to an electromagnetic field due to the physical property of electric charge. You can have a positive ornegative electric charge (commonly carried by protons and electrons respectively). Unlike charges attract one another while like charges repel one another. Neutral refers to an object that carries no net charge.
Electric charge is a conserved attribute, meaning that the net charge—that is, the sum of the positive and negative charges in an isolated system—cannot change. Subatomic particles carry an electric charge. In the nuclei of atoms, protons have positive charge and electrons carry negative charge in normal matter.
So, an element becomes a positively charged ion when it loses negative charge, that is, electron.
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When light waves first enter the eye, they first pass through this transparent layer where they are refracted
HELP!!!!!! PLEASE!! I WILL GIVE 25 POINTS!!!!1) Joe and Ben were arguing about the Law of Conservation of Energy. Joe said that the Law of Conservation of Energy must be false because when you turn on a light it uses energy and so some of the energy is lost. Ben disagrees and says that energy cannot be created or destroyed. Who is right? Justify your answer.A) Joe is right because the electricity is changed to heat and light and is no longer electricity.B)Ben is right because the Law of Conservation of Energy is a law and cannot be false.C) Ben is right because the electricity from the light is transformed into heat and light.D) Joe is right because all electrical lights and appliances use electricity.2) Greg and Shawn are studying for a physical science test. Greg thinks that the kinetic energy of an object depends on the height and speed of an object, but Shawn thinks it depends on the mass of an object. Who is right and why?A) Shawn is right. The mass of an object determines the inertia of the object. Increasing inertia is the only thing that will increase kinetic energy.. B) Both Greg and Shawn are correct since kinetic energy depends on mass, height and speed of an object.C) Greg is right. Increasing the height or speed of an object increases the kinetic energy of an object.D) Neither is completely right. Shawn is partly correct since kinetic energy depends on mass, but Greg is also partly right since it also depends on speed.3) Dan got into his car in the middle of summer. When he sat on the hot black leather seats, he burned his legs. His sister said that conduction was the reason Dan burned his legs, but Dan blamed the sunshine and said it was radiation that caused him to get burned. Who was right and why?A) Both Dan and his sister are right. The sun heated the car seats through radiation heat transfer, but then Dan touched the seat and the heat was conducted to his legs.B) Dan's sister was correct because Dan's legs touched the car seats. That is an indicator of heat transfer by conduction.C) Dan was right because the sun heated the car without touching it. That is radiation.D) Dan's sister was right because conduction can transfer heat through both solids and fluids (such as air).
1 . If the gravity increases what will happen to potential energy?a. Increase b. Decrease c. Remain the same 2 . If the mass of an object increases how will kinetic energy be effected ? a. Increase b. Decrease c. Remain the same 3 . Two objects have the same mass; object A has a greater acceleration then B. Which Option will have Greater force? a. Object A b. Object B c. Both the same 4 . The total amount of energy in a closed system remains______. a. Will Increase b. Will Decrease c. Remain The same PLEASE GIVE REAL CLEAR ANSWERS. Thank You
An artificial satellite circling the Earth completes each orbit in 129 min(a) Find the altitude of the satellite.(b) What is the value of g at the location of this satellite?
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B) reduces the amount of input work
C) changes the direction of the input force
D) increases the input distance
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C) changes the direction of the input force
Explanation:
A weight machine measure the normal reaction of a body place on the machine.This means the force will have no acceleration. The body placed on the machine will thus exert the force due to gravity and the normal reaction will act in the opposite direction to it.
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Let's get started:
1. a rusting bicycle
This is NOT a physical change because a new substance is formed.
3Fe+ 2O2 -> Fe3O4
2. breaking glass
This is a physical change.
3. melting butter
This is a physical change.
You just change the phase of butter from solid to liquid, but still there is no new substance formed.
4. burning leaves
When you burn something organic, CO2 will be formed.
Therefore, this is NOT a physical change.
5. cutting your hair
This is a physical change.
6. frying an egg
When you fry an egg, iron (Fe) in the yolk reacts with hydrogen sulfide (H2S) in the white to form iron sulfide (FeS).
Therefore, this is NOT a physical change.
7. water evaporating
With the same reason as 3, this is a physical change.
8. mixing salt and water
This is a physical change (with the same reason as 3).
NaCl (s)+ H2O -> NaCl (aq)
Hope this helps~
Answer:-
- breaking glass
- melting butter
- cutting your hair
- water evaporating.
- mixing salt and water
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Answer:
Friction force on the ground is 488.6 N
Explanation:
As we know that the force of reaction which is along the horizontal surface in tangential direction is known as Friction force while other perpendicular component of the force is Normal force
Here we know that force is inclined at 20 degree with the horizontal
so we have
here we know
F = 520 N
so we have
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Answer: Doppler effect
Explanation:
The Doppler effect refers to the change in a wave perceived frequency when the emitter of the waves, and the receiver (or observer in the case of light) move relative to each other.
In other words, it is the variation of the frequency of a wave due to the relative movement of the source of the wave with respect to its receiver.
Another important aspect is that the effect occurs in all waves (including light and sound). However, it is more noticeable to humans with sound waves.
The Doppler effect is the apparent change in frequency of waves due to the motion of a source.