Answer:
A
Explanation:
Electrical energy that reaches a light bulb changes to light and heat energy. Which of these energy types is considered 'wasted'?
A.heat
B.light
Answer:
A. Heat
Explanation:
Answer:heat
Explanation:
Help pls do the last two all work and last two questions
d1 = 15 miles
t1 = 1 hour
d2 = 25 miles
t2 = 2 hours
d = 15 + 25 = 40 miles
t = 1 + 2 = 3 hours
[tex]avg. \: speed \: = \: \frac{total \: distance}{total \: time} [/tex]
[tex]avg. \: speed \: = \frac{40}{3} [/tex]
[tex]avg. \: speed \: = 13.33mi \: hr ^{ - 1} [/tex]
In the diagram, the arrow shows the movement of electric charges through a wire connected to a battery.
What causes the electric charges to flow from one end of the battery to the other?
-a balance in electric potential
-a balance in resistance
-a difference in electric potential
-a difference in resistance
Answer:
The answer is C a difference in electric potential.
Explanation:
Got it right on test
Answer:
Your answer is C
Explanation:
-a difference in electric potential
Hope this helps :)
[PICTURE ATTACHED] help please
Answer:
i think its A
Explanation:
Help I don’t know what I should choose heelppp
Answer:
It is either c or d. Hope this helps. Please tell me if I was right or wrong.
Explanation:
Answer:
it would be air, oil, water so non of the above is my answer
11. the answer is not A
If heat or energy is absorbed during a chemical reaction, then the reaction is considered:
endothermic
synthesis
combustion
exothermic
If heat or energy is absorbed during a chemical reaction, then the reaction is considered as an endothermic reaction. The enthalpy change of an endothermic reaction is positive.
What is an endothermic reaction ?The reaction in which heat energy is absorbed by the reactants is called an endothermic reaction. The enthalpy change in an endothermic reaction is positive.
The reaction in which heat is evolved from the system to the surroundings is called an exothermic reaction in which the enthalpy change is negative.
By absorbing heat energy, reactants becomes energetic enough to overcome the barrier potential of the reaction. Therefore, the potential energy diagram of an endothermic reaction will show less energy for reactants than that of products.
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Two seventh grade students are studying how sound waves are transferring energy. They hold a large pot near the side of a cup of water and bang the pot with a wooden spoon. What is the medium for the sound waves to get to the students' ears?
Question 1 options:
A) Glass of water
B) Air
C) Large pot
D) Spoon
Answer:
air is the medium through which the energy travels.
Explanation:
The disturbance moves away from the source through a medium to our ears.
Somebody please help me its due today!!
Answer: The answer is A
Explanation:
You are going to add hydroelectric, biomass, and geothermal, solar, and wind. Hope this works.
A student is building a simple circuit with a battery, light bulb, and copper wires. When she connects the wires to the battery terminals, the light bulb does not light up. Which of the following could explain why the bulb does not light?
A.There is no energy source.
B.The circuit is open.
C.This circuit is too simple to light up a light bulb.
D.Copper wires do not conduct electric current.
Answer:
b
Explanation:
The distance between the line on this graph and the x-axis tells the speed of the object. Is it Distance-Time Graph or Speed-Time Graph? PLEASE HELP!!
Answer:
X=Mc2 i think i really have no clue
Explanation:
DUE TOMORROW GIVING BRAINLIEST!
Please define the following terms:
condensation, pressure, temperature, thermal energy.
Answer:
condensation:The act or process of condensing or of being condensed pressureA pressing; a force applied to a surface.
temperature The state or condition of being tempered or moderated.
n:
Answer: Condensation- water which collects as droplets on a cold surface when humid air is in contact with it. Pressure-pressure is defined as a measure of the force applied over a unit area. Tempature- The degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch. Thermal energy- energy resulting from the motion of particles It is a form of kinetic energy and is transferred as heat
Hope it helps!
Use complete sentences to differentiate between acids and bases on the basis of touch. Give an example of each type.
Answer:
There are several theories to explain the difference between an acid and a base. One of the most complete theories is Lewis's theory, because it encompasses several compounds that other theories do not include. According to Lewis's theory, an acid is a substance capable of accepting a pair of electrons. And Lewis bases are substances that have the ability to donate a pair of electrons.
An example of an Lewis acid-base reaction is ammonia and boron trifluoride:
BF3 (is the acid) + NH3 (is the base) → H3N - BF3
Some differences of acids and bases to the touch are:
• Acids are sour in taste while Bases are bitter in taste. This is due to the pH that indicates acidity or basicity, and is defined as the hydrogen potential of a solution. The pH indicates the concentration of hydrogen ions in a substance. Substances with pH less than 7 are considered acidic, while substances with a pH greater than 7 are considered as bases (alkaline).
• Acids are highly corrosive, and can cause chemical burns to the skin, or respiratory damage when inhaling their gases. An example is sulfuric acid (H2SO4), which can corrode steel. The bases instead have a feeling of soap or slippery to the touch.
• Acids react with metals to produce compound and hydrogen gas while bases do not react with metals. For example, copper is attacked by nitric acid by reaction:
Cu(s) + 4HNO3(aq) ⇒ Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)
• Acids turn blue litmus paper into red whereas in case of Bases they turn red litmus paper into blue.
• The bases are irritating to the skin, as they dissolve the skin fat, and can destroy organic matter by its caustic effect. An example is Sodium Hydroxide (NaOH)
• Acid and bases are good conductors of electricity in aqueous solutions.
Explanation:
HOPE THIS HELPS
Answer:
Acids can burn your skin when touched because acids are highly corrosive, whereas bases are slimy and have a slippery feel. An example of an acid is citric acid, which can be used as a disinfectant or in foods and candies as a flavor enhancer. Bleach is an example of a base and is used for cleaning and has whitening properties.
Explanation:
thought i'd give a shorter version, i might be wrong tho
What reasoning describes all mixtures?
All mixtures are made up of compounds.
All mixtures are made up of elements.
All mixtures are made up of atoms.
All mixtures are made up of colloids.
Answer:
Mixtures are made of two or more substances (elements or compounds) that are mixed physically but not chemically.
Using this definition we can say the reasons are the first two.
Answer:
C.
Explanation:
everything is
What is the ionosphere and how does it form?
Answer:
ionosphere is the ionized part of Earth's upper atmosphere, it grows and shrinks depending on the energy it absorbs from the Sun.
Explanation:
It's due in 9 mins.. who ever waste my coins will get reported
What happens to air when it is heated by the sun?
water vapor changes to liquid
it rains
it descends
it rises
Answer:
D. It rises
Explanation:
Heat energy is released when the sun comes in to contact with the air. It then gets pushed into the atmosphere which creates a bubble of air that is warmer, causing that bubble to rise.
i need help it is due by sunday
Answer:
lol sunday was yesterday eheheheheh
Explanation:
Which scenario best describes motion?
A. a toy train in position 4 on a number line
B. a race track that is 100 meters long
C. a ball rolling from point A to point B
D.a student living 150 miles from Chicago
The scenario which best describes motion is a ball rolling from point A to point B as it is moving.
What is motion?Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.
Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.
Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic mechanics is based on modern kinematics.
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plz help me thank you so much for helping
Answer:
A: matter or mass cannot be created or destroyed
why are phase changes intensive properties?
Answer:
Intensive properties, such as density and color, do not depend on the amount of matter. Both extensive and intensive properties are physical properties, which means they can be measured without changing the substance's chemical identity.
Explanation:
How do the circulatory, respiratory, or digestive systems work together?
Answer:
by pumping blood throughout the body.
Explanation:
In performing the "STEP TEST" for 3 minutes, what was your score ?
Answer:
78
Explanation:
That's my score when I did a 3-minute Step test
ATOMS , help me solve this , and thx for your help
Answer:
8?
im not sure
Explanation:
Most strings of outdoor lights are wired in a parallel circuit. Which of the following is the best reason why a string of outdoor lights should be wired in a parallel circuit and not a series circuit?
A.Parallel circuits are safer to use than series circuits.
B.The lights in a parallel circuit will light up brighter than the lights in a series circuit.
C.If one light in the string burns out in a parallel circuit, the rest of the lights will continue to shine.
D.You need to use more wires to construct a series circuit than a parallel circuit.
Answer:
C.If one light in the string burns out in a parallel circuit, the rest of the lights will continue to shine.
What is cellular respiration and why do our cells use it?
Answer:
la respiración celular supone un proceso metabólico mediante el cual las células reducen el oxígeno y producen energía y agua. ... Estas reacciones son indispensables para la nutrición celular. La liberación de energía se desarrolla de manera controlada.
Explanation:
Answer:
to produce i think
Explanation:
Air enters and exits the lungs through the ___.
aveoli
bronchi
pulmonary vein
trachea
Write an explanation to a 5-year-old child how rain is formed referring to the water cycle. Use terminology appropriate for this age group.
Answer:
The water from the ground rises to the sky and makes clouds. When the clouds become dark then rain or snow fall to the ground.
Water droplets make up clouds. These water droplets fall to Earth as rain when they get too heavy to remain suspended in the cloud.
Why does Earth produce rain?Droplets of water make up clouds. Water droplets become larger when they condense onto one another within a cloud. Raindrops descend to Earth when these water droplets become too heavy to remain suspended in the cloud.
Why is rain significant to Earth?The water cycle on Earth, which is essential to all life, includes both rain and snow as important components. The principal method that water from the heavens falls to Earth is through rainfall, which also replenishes underground aquifers and hydrates plants and animals as well as fills our lakes and rivers.
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NEWWWW SORRY FOR A BIT OF READING ,
Answer:
I think It Is B
Explanation:
experiments, ATOMS, plz answer, and thx for your help
5, the answer is not c , pleaser answer
