Answer:
an example of an exthermic process is combustion
Explanation:
combustion is like lighting a candle
need help with both questions
Answer:
b then c
Explanation:
The denser a substance, the more tightly packed it is. The table below shows the volume and mass of two different substances. Comparison of Substances Substance Volume (cm3) Mass (g) R 22 10 S 55 25 Which of the two substances is more tightly packed? Object R is more tightly packed. Object S is more tightly packed. Both objects are packed equally tightly. This cannot be determined.
Answer:
Both objects are packed equally tightly.
Explanation:
For Substance R we have
mass = 10 g
Volume = 22 cubic cm
So we know that density is defined as
[tex]\rho = \frac{m}{V}[/tex]
here we have
[tex]\rho = \frac{10 g}{22 cm^3}[/tex]
[tex]\rho = 0.454 g/cm^3[/tex]
For substance S we have
mass = 25 g
Volume = 55 cubic cm
So we know that density is defined as
[tex]\rho = \frac{m}{V}[/tex]
here we have
[tex]\rho = \frac{25 g}{55 cm^3}[/tex]
[tex]\rho = 0.454 g/cm^3[/tex]
So here both have same density
so correct answer would be
Both objects are packed equally tightly.
Answer:
c
Explanation:
What color would an object that reflects green and blue light appear to be in white light?
a. blue
b. cyan
c. magenta
d. black
The answer is B. cyan.
If an object reflects green and blue light we preceive the reflection not as separate colours but a mixture of both aka cyan.
Hope this helps.
r3t40
The color appears as cyan when an object reflects green and blue light.
Answer: A
Explanation
The light that is visible to the eye is a form of electromagnetic energy.
White light consists of the electromagnetic spectrum combined by lights of various wavelengths.
Each individual light in this white light has distinct frequency and wavelength.
The clouts observed is due to the reflection of light consisting of three colors- red, blue and green known as primary additive colors of light.
When blue and green combine, primary subtractive color forms, cyan.
Use the drop-down menus to complete the statements.
have a definite shape and volume.
do not have a definite volume or shape.
have a definite volume, but the shape may change.
Answer:
solids have definite shape and volume, liquids have definite volume, but no definite shape, gas has no definite shape or volume. I hope that this is what you was looking for.
Answer:
Solids
Gases
Liquids
Explanation:
Solids have the strongest inter-molecular forces in them, this causes them to have a definite shape and volume.
Gases have the weakest inter-molecular forces in them, this causes them not to have a definite volume or shape. Moreover gases are compressible which means with enough pressure the volume may change for the same number of particles.
Liquids have weaker inter-molecular forces than solids but stronger than gases, this causes them to have a definite volume, but indefinite shape.
Selma made a diagram to compare convection and radiation.
Which label belongs in the area marked X?
Must involve temperature differences between substances or objects
Only occurs when molecules are in direct contact
Involves the movement of fluids based on density differences
Can occur where there is little or no matter
Answer:
Can occur where there is little or no matter.
Explanation:
Radiation is mode of heat transfer that does not necessarily have to involve a medium. Radiation occurs fastest in a vacuum where it has a speed of c- the speed of light where heat energy is transferred in photons. The factors that affect radiation include the distance between the producer of the heat and the receiver and the temperature of the producing body.
Answer:
Can occur with little or no matter
Explanation:
in which type of circuit does charge move in only one direction?
A. An AC circuit
B. A parallel circuit
C. A combined circuit
D. A DC circuit
In the DC circuit, the charge move in only one direction, Option D is correct.
What is a DC circuit?Electric Current flows in only one direction in a Direct Current circuit. Many low-voltage applications use DC, particularly those that are battery-powered. A DC power supply is necessary for most electronic circuits.
In the DC circuit, the charge move in only one direction,
Hence, option D is correct.
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A large truck is moving 22.0 m/s. If it’s momentum is 125,000 kg • m/s, what is the trucks mass
Answer:
p = mv
m = p/v = 125000/22 = 5682 kg
Explanation:
Direct application of the momentum equation
p = mv
where,
p: momentum
m: mass
v: object velocity
steps:
-------
1) check for units consistency ( SI or Imperial)
2) separate the variable you are looking for.
3) DONE! :DD
Answer:
the answer is C. 5680 kg
Explanation:
on larry foe nem
Isaac Newton used a ____ to break white light into its component colors.
In the eighteenth century Isaac Newton found out that when a beam of light from the Sun, passes trhough a prism is decomposed in many different colors. He named this phenomenom as dispersion of light.
This phenomenom occurs when a beam of white light (which is compound of many wavelengths or "colors") is refracted (the different rays of light are diverted depending on their wavelengths) in some medium, leaving their constituent colors separated.
Therefore:
Isaac Newton used a prism to break white light into its component colors.Which of the following describes water
Water is a liquid, that is wet. Water is formed by 2 hydrogen atom and 1 oxygen atoms. Water can be a solid, aka ice, a liquid, aka H2O, and a gas, aka water vapor.
I hope that this is all the info you need, if you need more on water please commit my answer, and please mark me as brainiest answer.
Use the right-hand rule for magnetic force to determine the charge on the moving particle. This is a charge.
Answer:
Use the right-hand rule for magnetic force to determine the charge on the moving particle.
This is a
negative
charge
Explanation:
Answer:
The answer is negative
Explanation:
Will mark brainlist
A line has a slope of 5 and a y-intercept of 0 Which is the equation of the line?
Answer:
y=5x
Explanation:
it would be y=5x because in slope intercept form, y=mx+b, the "m" equals the slope, so when it says that the slope is 5, you plug it in there. And then the b is the y intercept, so because it is 0, you don't put anything down
How much energy goes toward kinetic energy?
A famous motorcycle company has just built its first electric
model. Like all vehicles, the purpose of the motorcycle is to
put out kinetic energy
O
50 J
200 J
400
800
O
Electric
energy
800 J
Kinetic
energy
? J
Heat
200 J
Friction
200 J
Answer:
(c) 400j
Explanation:
The amount of energy dedicated to kinetic energy will be 400 J.Option C is correct.
What is Kinetic energy?The energy possessed by the body by the virtue of motion is known as kinetic energy. It is found as the product of mass and the square of the velocity.
Part of the energy in each machine that exists dissipates to the medium in the form of heat, friction with the surface, and other forms of energy dissipation.
If the entire kinetic energy loses 200 J in the form of heat and 200 J in the form of friction this quantity of energy has been wasted and cannot be utilized as kinetic energy.
The energy goes toward kinetic energy will be ;
Kinetic energy = Electric energy -Heat-friction
Kinetic energy = 800-200-200
Kinetic energy =400 J
Hence, the amount of energy dedicated to kinetic energy will be 400 J.Option C is correct.
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light refracts because
Answer:
it travels at a different refractive index.
Explanation:
for example when light travels into water, it slows down, causing it to continue to travel at a different or another angle or direction. hope this helped!
Refraction of light occurs due to the different refractive indices of the medium in which the light travels.
Explanation:
The medium through which the light travels have different refractive indices, because of which the light rays crosses the boundary of the refractive indices. They are shifted from the travelling line according to the refractive index of the medium and hence, refraction is seen.
For example, air is medium with less refractive index as compared to glass, and therefore the light ray when enters into glass, travels slow and refracted from the actual path towards the normal of the ray.
Which of the following are major problems with fission reactors?
1.Maintaining high temperatures
2.Disposal of hot water
3.Disposing of radioactive waste
4.Obtaining fuel
Answer:
The correct answer is C: Disposal of radioactive waste.
Explanation:
During nuclear fission reactions, many intermediate radioisotopes are produced. For example, uranium releases different mass distribution isotopes and these isotopes emit radiations.
Most harmful isotopes for the environment are strontium and cesium because these have half-lives and an inclination of mixing in food chains.
When radioactive wastes are removed from nuclear reactors they flow towards the swimming pool and also have the tendency to isolate the short-lived isotopes from the environment.
Therefore, radioactive waste disposal has always remained a major problem
Answer:
The third one is the correct answer:)
Explanation:
sing the Law of Gravitation, explain why the moon orbits the earth and the planets orbit the sun.
Which is not a step in the rock cycle?
Answer:
You didn't provide any answer choices so, I'll tell you the steps in the rock cycle.
1. weathering and erosion
2. transportation
3. deposition
4. compaction
5. cementation
Hope this helps!
How many countries are in the world?
Answer:
195 countries
Explanation:
There are only 195 countries within the whole world.
When a pendulum is held high and taut and then is released, the pendulum begins to swing. What’s the correct order of the energy transformations in this example? (PE stands for potential energy.)
Answer:
Pendulum:
A pendulum consists of a mass (known as a bob) attached by a string to a pivot point. As the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.
Energy Transformations:
From Max to Mean Position:
When the bob of the pendulum is held high at one maximum. All the energy of the pendulum is in the form of Potential Energy. The speed of the bob is zero. When released, the bob starts moving downward and as it moves, it gains speed. Here, the Potential Energy of the system is being converted into Kinetic Energy. At the mean position, when the bob is at the minimum height, the potential energy of the system is zero and Kinetic Energy is maximum as the bob is at its maximum speed.
From Mean to Max Position:
Due to Inertia, the bob at the speed v continues its motion and moves towards the other extreme position. And as it do so, the speed decreases and becomes zero at the extreme position. The Kinetic energy converts into Potential Energy,
The motion thus continues.
A graph has been attached for better understanding of the Energy Transformations.
Answer:
Sooo . . . whats the answer
Explanation:
An electric oven has a resistance of 201 ohms and a voltage of 220 V. How much current does it draw?
a) 11 A
b)1.1 A
c)1,100 A
d) 110 A
1.1 A. An electric oven with a resistance of 201Ω and a voltage of 220V drwa a current of 1.1 A.
The easiest way to solve this problem is using the Ohm's Law I = V/R.
An electric oven has R = 201Ω, and a drop of voltage V = 220v, solve using I = V/R:
I = 220V / 201Ω
I = 1.09 A ≅ 1.1 A
A generator derives electric energy from _____ energy.
From mechanical energy.
Answer:mechanical energy.
What is the solution to the problem expressed to correct number of significant figures (102,900/12)+(170x1.27)
Answer:
8,790.9
Explanation:
first we start with parentheses so we take (102,900/12) and (170x1.27) and simplify these 102,900/12 would equal 8575, and 170.1.27 would equal 215.9. next we add these together, so (8575)+(215.9), and that would equal our answer which is 8,790.9
To calculate (102,900/12)+(170x1.27) correctly to significant figures, we find that the sum is 119.9 when rounded to the tenths place. It's essential to respect the rules for significant figures, where the precision of the least precise measurement used in the calculation dictates the precision of the final answer.
The solution to the problem (102,900/12)+(170x1.27) needs to be expressed to the correct number of significant figures. When performing calculations with measured values, it's important to consider the precision of the numbers involved. In addition, different operations have different rules for significant figures.
For the calculation provided, first each component needs to be calculated separately:1.)102,900 divided by 12 gives a result which is an integer and thus has an unlimited number of significant figures.2.)170 multiplied by 1.27 equals 215.9, where 170 has three significant figures and 1.27 has three significant figures, so the result should also be reported with three significant figures.
After calculating each component, we then add the two results. The sum must be reported to the lowest place value of the least precise measurement (in this case, the tenths place). This means that the correct final answer, expressed with the appropriate number of significant figures, is 119.9 (assuming the first calculation to be an exact number).
When dealing with the addition of 89.332 and 1.1, since the second number has fewer significant figures after the decimal place, the result should be reported to match that precision. The answer, when rounded to the correct number of significant figures, is 90.4.
Overall, understanding the rules for significant figures is crucial in accurately reporting measurements and results in scientific and mathematical contexts.
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the ____.
Answer:
A standard for comparison that helps to ensure that the experimental result is caused by the condition being tested is the 'control'.
Explanation:
Control is the standard used for the comparison which helps to make sure that the results of a certain experiment are caused by the condition which is being tested.
In controlled experiments, only one variable is changed at a time while the other variable (controlled variable) is kept same in order to isolate the results.
which best describes the act of using senses or tools to gather information
Answer:
The act of using senses or tools to gather information is called Observation.
Answer: It is called an observation
Explanation: When we have a phenomenal and we want to gather information about it, we need to "observe" it.
This may be done by using our senses, like looking, smelling, touching, or a more modern approach, using tools, like spectrometers, velocimeter, or the needed tool.
A given feature of a phenomenon that can be measured is called an "observable", and the act of measuring this "observable" is called an "observation"
When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside is called
Answer:
centripetal force
Explanation:
When a person spins a bucket of water in a circle, the force acting on the bucket to keep the water inside is called centripetal force.
The centripetal force is a constant resultant force that acts on an object in circular motion.
Answer:
centripetal force
Explanation:
In physics the desire of an object to keep doing what it is doing is termed?
Answer:
In Physics, the desire of an object to keep doing what it is doing is termed as Inertia.
Explanation:
Inertia is the quality of an object due to which it does nothing or remains unchanged.
According to Newton's first law of motion "An object at rest remains at rest or keeps moving in a straight line with uniform speed unless an external force is acted upon it."
This law is also known as the Law of Inertia.
The current flowing through the circuit will be ?
[tex]
R_1=20\Omega \\
R_2=30\Omega \\
R_3=30\Omega \\
U=2V \\ \\
R_{12}=\dfrac{1}{R_1}+\dfrac{1}{R_2}=\dfrac{R_1R_2}{R_1+R_2}=15\Omega \\
R_{123}=\dfrac{R_{12}R_3}{R_{12}+R_3}=10\Omega \\
I=\dfrac{U}{R_{123}}=\boxed{0.2A}
[/tex]
Hope this helps.
r3t40
Charlie Brown kicks a football at 24.5 m/s at 35.0. What is the maximum height of the ball?
Answer:
d = 10.076 m
Explanation:
We need to obtain the velocity of the ball in the y direction
Vy = 24.5m/s * sin(35) = 14.053 m/s
To obtain the distance, we use the formula
vf^2 = v0^2 -2*g*d
but vf = 0
d = -vo^2/2g
d = (14.053)^2/2*(9.8) = 10.076 m
Answer:
10.076
Explanation:
help please........easy question
A small turtle moves at a speed of 186 furlongs per fortnight
Find the speed of the turtle in centimeters per second. Note
that 1 furlong = 220 yards and 1 fortnight = 14 days.
Answer:
3.09 cm /sec.
Explanation:
Speed = distance / time taken
= 186×220× 91.44 cm/sec
1×14×86400
= 3.09 cm /sec.
Note: 1 yard = 91.44 centimeters
And 1 day= 24×60×60= 86400 seconds.
The speed of the small turtle in centimeters per second is 3.1 cm/s.
The given parameters:
speed of the small turtle, v = 186 furlongs per fortnight
1 furlong = 220 yards
1 fortnight = 14 days
To find:
the speed of the turtle in centimeters per secondFind the equivalent yard in centimeter and equivalent seconds in a day:
1 yard = 91.44 cm1 day = 86,400 sCalculate the speed of the small turtle in centimeters per second:
[tex]v = 186 \ \frac{furlong}{fortnight} \times \frac{220 \ yards}{1 \ furlong} \times \frac{1 \ fortnight}{14 \ days} = 2922.857 \ \frac{yards}{day} \\\\In \ centimeter \ per \ second:\\\\v = 2922.857 \ \frac{yards}{day} \times \frac{91.44 \ cm}{1 \ yard} \times \frac{1 \ day}{86400 \ s} = 3.1 \ \frac{cm}{s}[/tex]
Thus, the speed of the small turtle in centimeters per second is 3.1 cm/s.
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the applied force of 3 washers will increase the applied force on the car to n.
Answer: 0.147
Explanation:
just took it
Answer:
0.147
Explanation:
Because i just did it and got it right :))) your welcome
What types of energy are involved in a chemical reaction
Final answer:
Chemical reactions involve the conversion of thermodynamic energy and kinetic energy. Thermodynamic energy changes determine if a reaction is exothermic or endothermic, while kinetic energy is needed to overcome activation energy. Potential energy stored in chemical bonds is often converted into other forms like mechanical kinetic energy.
Explanation:
Chemical reactions always involve changes in energy. There are two main types of energy relevant to reactions: thermodynamic energy and kinetic energy. Thermodynamic energy is related to the energy changes when reactants convert to products, which can be either released or absorbed. This type of energy change defines whether a reaction is exothermic or endothermic. Kinetic energy, on the other hand, is the energy that reacting molecules must possess to overcome the energy barrier to react and form products, known as the activation energy.
In the course of a reaction, chemical bonds break and new ones form. The energy stored in these bonds is a form of potential energy. When substances convert, there is a conversion of energy forms - for example, chemical potential energy can be converted to mechanical kinetic energy, such as in a car engine where the combustion of gasoline moves pistons.