Answer:
False
Explanation:
Polaris is always located at the zenith.
True
False
Explain the flow of energy in the food chain and why stored energy is an important part of it.
The energy flow in the ecosystem is important to maintain an ecological balance. The producers synthesis food by the process of photosynthesis. A part of the energy is stored within the plants. The remaining energy is utilized by the plants in their growth and development.
A meteor falls toward Earth's surface. Given that the acceleration due to
gravity is 9.8 m/s^2, what is the meteor's potential energy if it has a mass of 10
kg at an altitude of 400 m?
O A. 408 J
O B. 7,840,000 J
O C. 2J
O D. 39,200 J
Answer:
39,200J
Explanation:
just took the test
The meteor's potential energy if it has a mass of 10kg at an altitude of 400 m will be 39200 J
What is potential energy ?Potential Energy that depend upon the relative position of various parts of system . It is an energy possessed by an object by virtue of its position or configuration.
mass(m) = 10kg
g (acceleration due to gravity) = 9.8m/s^2
altitude(height (h)) = 400m
Meteor's Potential energy = m * g * h
= 10 * 9.8 * 400 = 39200 J
correct option will be a) 39200 J
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Find the voltage if the current is .2 A and the resistance is 2 .
Answer:
The voltage is 0.4 v
Explanation:
Given :
I = 0.2 A
R = 2 ohm
so,
=> V = IR
=> V = 0.2×2
=> V = 0.4v
A mountain climber starts at the base of a mountain, climbs all the way to the
peak, and then climbs back down to the base. At which point is the climber's
potential energy the lowest?
A. Halfway down from the peak
B. At the end of the climb
C. Halfway up to the peak
O D. At the peak
A mountain climber starts at the base of a mountain, climbs all the way to the peak, and then climbs back down to the base. At which point is the climber's potential energy the lowest At the end of the climb.
What are the types of energy ?The energy is ability to work or produce action and / or movement and manifests itself in many different ways, such as body movement, heat, electricity, etc.
The different types of energy include Kinetic energy which is associated with the movement of bodies. Potential energy which is stored by virtue of a body's position relative to its surface is also called gravitational potential energy.
Thermal Energy or Heat can be defined as the energy associated with the kinetic energy of the molecules that make up an element, it can be manifested if there is a temperature difference between two bodies.
Chemical energy released or formed from chemical reactions, Solar energy from sunlight. This form of energy is used to generate electricity through photovoltaic plates.
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Where are the magnetic field lines closest together, and what does that tell you about the strength of the magnetic field?
Answer:
Magnetic field lines are closest near the poles of a magnet. The closer the magnetic field lines, the stronger the magnetic field is at that point.
Explanation:
I hope this helps!
which part of the helicopter blades spin the fastest?
Answer:
Tail Rotor
Explanation:
Although it is the smallest, it can rotate much faster than the other blades.
Answer:
C (the part of the blade that is halfway between the end and where it connects to the helicopter)
Explanation:
How do rechargeable batteries work? When a rechargeable battery is connected to electricity it changes the pressure inside and allows the rubber membrane to expand, thus releasing more energy next time its used. When plugged into the wall the electrons are sent back to rebuild the original dry cell (or metal). Rechargeable batteries are made exclusively of nitrogen which when exposed to electricity from and outlet can store a charge. When a battery is zapped by the electricity from the outlet it resets the system.
Answer:
In a rechargeable battery, however, the reaction is reversible. When electrical energy from an outside source is applied to a secondary cell, the negative-to-positive electron flow that occurs during discharge is reversed, and the cell's charge is restored.
Explanation:
In a rechargeable battery, however, the reaction is reversible. When electrical energy from an outside source is applied to a secondary cell, the negative-to-positive electron flow that occurs during discharge is reversed, and the cell's charge is restored.
Hey guys, so I need to know what happens when molecules are heated up and what happens when they are cold. I need a very descriptive answer. I know they move faster when heated and slower when cooled. So, I need you to describe the process ig.
Answer:
when the molecules are heated , they move faster and the space between them will increase . they become very lossly packed and thus evaporate. this process can also be called evaporation in detail
when the molecules are cooled down, they move slower and they have very less space between. they becomes tight as they are cooled tgus condenses this process can also be called as condensation in detail
Answer:
When the molecules are molecules are heated the bond holding the molecules together becomes lose and hence making the molecules to vibrate and move more faster which also makes the kinetic energy to increase.
Explanation:
The greater the __ and __ the more kinetic energy there will be. (Fill in the blanks)
Answer the gerater mass and the faster the object moves the more kenetic enegry there would be
Explanation:
Answer:
The greater the mass and acceleration the more kinetic energy there will be.
Kinetic energy and Explanation
The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
Mass and Explanation
Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram.
Acceleration and Explanation
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing.
In your own words, explain why the dishes remain in place when the magician pulls the cloth out from under them.
Newton's first law states that unless acted with by an external force, the dinnerware will remain immobile. The horizontal force acting on the objects on the table in this example is the frictional force between them and the table cloth, which sets them in motion.
According to Newton's second law, the force required to accelerate the tableware is proportional to the rate of acceleration. When the tablecloth is slowly pushed, the dinnerware adjusts to fit the modest rate of acceleration and moves with it. When the tableware is pulled swiftly, it needs to accelerate at a faster pace to keep up; but, the effort required to do so is larger than the frictional force available, thus it lags behind. The tableware 'stays put' when the cloth is tugged quickly.''
This question covers one of the most enigmatic aspects of our universe! Inertia is the easy answer to your question. In other words, because of inertia, when you remove the table linen off a table full of dishes, the dishes stay put. Matter's inertia is a property that characterizes its resistance to change in motion. When you're jogging and try to turn, you'll find that the faster you go or the bigger you are, the more difficult it is to shift direction.
Other examples of inertia include the following. Another example of inertia is when you are riding in a car and the driver rounds a corner and you feel pushed toward the door or over to the driver.
The dishes' inertia comes into play when the magician removes the cloth from underneath them.
The propensity of objects to resist changes in their state of motion is known as inertia. The dishes seek to preserve their original condition of rest when the fabric is quickly pulled because of inertia.
The dishes' and the cloth's friction is insufficient to rapidly overcome this inertia. As a result, the dishes initially hold in place before friction gradually takes over and causes them to slide.
Thus, the careful balance between inertia and friction results in this seemingly supernatural effect, producing a visually stunning illusion.
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please answer this ty!
Answer:
B.
Explanation:
Since the gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
Hi! I hope you have a good day! Please answer this question!
Which of these is NOT on the electromagnetic spectrum?
A radio waves
B. visible light
C. sound waves.
Answer:
Sound waves does not include in EM Spectrum
So, option C is your answer!
Explanation:
mark me brainliest!!
Answer:
the answer is C :D
Explanation:
Which of the following statements is true?
A. A golf ball has a larger volume than a baseball.
B. Most of the substances found on Earth are compounds.
C. Water (H 2O) is an element.
D. Water has a pH value of 0.
Answer:
B.
Explanation:
Most substances found in nature, wood, soil and rocks, are mixtures of chemical compounds.
Babylonians obtained wood for building from
Answer: t-trees?
i couldn't find anything on this topic but the only thing i could think of was trees, maybe if you go to a history website you can find a answer there :)
hope i helped a little :)
Answer:
Wood obtained from Canaan. Hope this helps :}
what is the combination of forces acting upon one object?
A. Net force
B. net mass
C. net weight
Answer:
A. Net force
Explanation:
giving out brain but don't beg because i will choose if the answer was right.
Two dogs are pushing against a box of dog treats from opposite sides. Dog 1 is pushing with 10 newtons of force to the right, and dog 2 is pushing with 15 newtons of force to the left. what is being applied to the box of dog treats?
A. 5 N to the left
B. 25 N to the left
B. 150 N to the left
Answer:
Answer choice B. 25 N to the left i think?
Explanation:
PLEASE HELP
In 3-5 complete sentences, compare and contrast the three ways that
waves change direction.
Answer:
Wind, tides last one is a?
Explanation:
Can someone please help me with this ;-; I'm bad at this
Which of these are functions of the liver? (Select all that apply.)
secretes hydrochloric acid into the stomach to break down food
filters poisons from the blood
secretes bile for fat break down into the gall bladder
stores vitamins, minerals, fats, and ingredients for making glucose
Answer:
Filter poisons from the blood!!! Hope this helped u have a great day :)
Explanation:
Which organelle is unique to plants and captures light energy for photosynthesis?
nucleus
chloroplast
mitochondria
vacuole
In photosynthesis chloroplast inside the leaf contain chlorophyll which captures light energy for photosynthesis.
hope this helps you
have a good day.
Hii! please answer this and have a nice day. :)
no bots please.
unrelated answer = report
unrelated comment = report
What is the net force in this image?
A. 15 N
B. 35 N
C. 250 N
D. -15
Answer:
a
Explanation:
Hii! please answer this and have a nice day. :)
no bots please.
unrelated answer = report
unrelated comment = report
its in the picture below.
Answer: C: no change in motion
Explanation:
If two forces are balanced, the net force is 0, which is neither positive nor negative. there will thus be no change in motion
What was the only food source available on the island, and what type of beak did the birds need to eat it?
large seeds and large beaks
small seeds and large beaks
large seeds and long beaks
Answer:
giving an educated guess (without background story) the answer that would make the most sense would be A. large seeds and large beaks
Explanation:
mr clean
Explanation:
Large seeds and large beaks
Two different rivers have drops that are the same height. In river A, this section of the river is a waterfall. In river B, this section has a hydroelectric dam. In what way does the energy differ between the drops in the two rivers?
The potential energy of the water would be less at the top of the drop in river A than in river B.
The kinetic energy of the water would be less at the bottom of the drop in river A than in river B.
The potential energy of the water would be greater at the top of the drop in river A than in river B.
The kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
Answer: I'd say it's either one of these:
1. The potential energy of the water would be less at the top of the drop in river A than in river B.
2. The kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
The energy difference between the drops in the two rivers as follows -
1 - the kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
2 - the kinetic energy will be less at the top of the drop in river A than in river B
What is Potential energy?The potential energy of the body at height (h) over the earth surface having mass (m) is given by -
E[P] = mgh
where -
m is the mass
g is the acceleration due to gravity
h is the height of the body
Given are two different rivers have drops that are the same height. In river A, this section of the river is a waterfall. In river B, this section has a hydroelectric dam.
Now, as the waterfalls, the potential energy of the water is converted to the kinetic energy and the lowest point of the waterfall, the kinetic energy would be maximum. Therefore, the kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
Similarly, at the top, the kinetic energy will be less at the top of the drop in river A than in river B as the velocity of river at that top point will be 0
Therefore, the energy difference between the drops in the two rivers as follows -
1 - the kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.
2 - the kinetic energy will be less at the top of the drop in river A than in river B
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In the space below, record all the sites you used for your research in proper MLA format.
Answer: If you used links, just insert them into the paper, if it was from a real life article or book just put "around the quote" and the say the book, author and page number
Explanation:
Like this,
Answer:
If you used links, just insert them into the paper, if it was from a real life article or book just put "around the quote" and the say the book, author and page number
Explanation:
The three types of mechanical waves are transverse waves, latitudinal waves, and surface waves.
Is this true or false?
Answer:
False
Explanation:
they are longitudinal, transverse, and surface waves
Answer:
False
Explanation:
Rather than latitudinal, it is longitudinal. So it is transverse waves, longitudinal waves, and surface waves
Match these items.
1. changes direction of effort single fixed pulley
2. input is ½ the distance block and tackle
3. system of pulleys single movable pulley
Answer:
Match with A) Single fixed pulley, B) block & tackle, or C) single moveable pulley
changes the direction of effort; input is 1/2 the distance; or system of pulleys
Explanation:
Answer:
single fixed pulley changes direction of effort
single movable pulley input is ½ the distance
block and tackle system of pulleys
Explanation:
I don't have an explanation so just trust me
Which has the greater wavelength
Answer: The one with 2 waves.
Explanation:
Wave length is the distance between the tips of each length, the greater the distance the larger the wavelength.
If the subject with type 1 diabetes eats a high-carb food such as the candy bar or orange smoothie, then the blood glucose levels will (increase/decrease/stay the same) after a three-hour digestion period.
Answer:
The subjects blood glucose levels will increase after 3 hrs
Explanation:
I had the lab assignment an got a 90