Its either B. force or A. net force but I will go with force because forces can either push or pull I hope it help you.
Answer:
12 cm
Explanation:
Mirrors work on the principle of reflection.
Reflection occurs when a ray of light bounces off a surface, being reflecting back into the original medium.
Mirrors are surfaces over which light is reflected; as a result, objects placed in front of a mirror produce an image of themselves.
There are two types of mirrors:
- Curved mirrors: this mirrors are curved, and are further divided into convex mirrors and concave mirrors. These mirrors can produce images that are real or virtual, bigger or smaller tha the original objects, and also upright or inverted, depending on the position of the object with respect to the mirror
- Flat mirrors: these mirrors are perfectly flat. The image produced by a flat mirror is:
- The same size as the object
- Laterally inverted
- Upright
- At the same distance as the object from the mirror (4)
- Virtual (it appears "behind" the mirror)
In this problem, the object is located 12 cm in front of the mirror. According to statement (4), the image produced by a flat mirror is at the same distance as the object: therefore in this case, it is 12 cm.
QUESTION 1 -
Which of the following best describes the use of a renewable resource? (2 points)
ANSWER:
C. There are areas in California that use the heat from deep in the Earth to generate electricity.
The answer is Option C as it is the only option which refers to a renewable energy resource. The renewable source which it refers to is geothermal energy as it is heat obtained from deep within the Earth which is utilised to produce electricity. Therefore, Option C is the answer.
QUESTION 2 -
Which of the following best describes the use of a non-renewable resource? (2 points)
ANSWER:
C. Natural gas is a great alternative to electricity for cooking.
The answer is Option C as it is the only option which refers to a non-renewable energy resource. Natural gas is a non-renewable resource as it was formed from the buried remains of plants and animals who were alive a significantly long time ago, thus making them fossil fuels. As all fossil fuels are non-renewable, natural gas must be a non-renewable resource. Therefore, Option C is the answer.
QUESTION 3 -
Which of the following best describes the use of a renewable resource? (2 points)
ANSWER:
D. Solar panels are able to gather the energy from the sun and convert it into electrical energy.
The answer is Option D as it is the only option which refers to a renewable energy resource. The renewable resource it refers to is solar energy as solar panels are utilised in order to produce solar energy for electricity. Solar energy is renewable as it utilises the sun's energy in the form of heat and light energy. As the sun's energy is unlimited and renewable resources are meant to be unlimited, solar energy must be a renewable energy resource. Therefore, the answer must be Option D.
QUESTION 4 -
Select the example that best describes a renewable resource. (2 points)
ANSWER:
B. My town is powered by electricity that is generated by the energy from the flow of water through a large dam.
The answer is Option B as it is the only option which refers to a renewable energy resource. The renewable resource it refers to is hydroelectricity also known as hydropower as it utilises energy from the flow of water in a large controlled dam. Hydropower is renewable as it utilises energy from the flow if water which is an unlimited resource. As hydropower is unlimited and renewable energy is meant to be unlimited, hydropower must be a renewable resource. Therefore, the answer must be Option B.
QUESTION 5 -
Which example describes a non-renewable resource? (2 points)
ANSWER:
D. There are drilling platforms all along the coast that are used to drill for natural gas that can be used to generate electricity.
The answer is Option D as it is the only option which refers to a non-renewable energy resource. Natural gas is a non-renewable resource as it was formed from the buried remains of plants and animals who were alive a significantly long time ago, thus making them fossil fuels. As all fossil fuels are non-renewable, natural gas must be a non-renewable resource. Therefore, Option D is the answer.
Hope this helps! :)
Have a lovely day! <3
True. Because you can touch it and it's physically real.
Answer:
The acceleration is about 9.8 m/s2 (down) when the ball is falling.
Explanation:
The ball at maximum height has velocity zero
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.8 m/s² (positive downward and negative upward)
The accleration 9.8 m/s² will always be acting on the body in opposite direction when the body is going up and in the same direction when the body is going down. The acceleration on the body will never be zero