Answers
h: sB and Sb
hd : sb
hr : SB
Hd:sb
Hr:sb
Related Questions
PLEASE HELP!! IM TIMED!! WILL MARK BRAINLIEST!! 13 POINTS!! SCIENCE!!
What best explains the source of light energy and heat energy produced by a star?
A. Dense metals, such as iron, explode in the core of a star.
B. Explosions from a nearby supernova provide fuel to the star.
C. Nuclear reactions involving the fusion of atoms occur in the core of a star.
D. High-energy radiation from nearby stars penetrate the core of a star.
Answers
Answer:
C
Explanation:
When a physical or chemical change occurs, the law of conservation of mass always applies. What happens to the atoms during a chemical change, according to this law?
Group of answer choices
Atoms disappear
Atoms are created.
Atoms are destroyed.
Atoms are rearranged.
Answers
Describe the units used to measure mass and volume.
Answers
Answer:
Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up. The basic SI unit for volume is the cubic meter (m3)
In the word "hydroelectricity," which of the following does the prefix "hydro-" relate to? Choose the best answer.
Answers
We didn't get any answer options but here's my answer anyways...
Hydro power is electrical energy produced through the power of moving water. Power obtained from the (typically gravitational) movement of water., Hydropower plants derive energy from the force of moving water and harness this energy for useful purposes...
Hope is helped!
PLEASE. A 20 kg box is being pulled across a floor by a horizontal rope. The tension in the rope is 99 Newtons. The coefficient of friction is 0.25. What is the force of friction on the box? What is the acceleration of the box?
Answers
Answer:
Force of Friction = -50 (N)
Acceleration = 2.45 (m/s^2)
Explanation:
Force of Friction = f = N * coefficient of friction
N = m * g
=> Force of Friction = m * g * coefficient of friction
f = 20 * 10 * -0.25 = -50 (N)
------------------------------------------------------
(1) F net = F + f
(2) F = m * a
(1) F net = 99 - 50 = 49
(2) a = 49 / 20 = 2.45 (m/s^2)
How do you think the weather and climate might change in the area around Mt. Everest?
Answers
Answer:
It does change if the weather is bad then very soon the climate will turn bad when the climate is unfavourable then the sourrounding will be affected. For example if the area around the Mt. Everest is Hot & Humind the ice would start melting & it would lead to way more issues.
HELP FAST ONLY CORRECT ANSWERS 15 PT
Research the Moon to understand why only one side of the Moon is observable from Earth. If this was the case with the Earth-Sun system, what would be Earth’s period of rotation?
Answers
Answer:
We only see one side of the moon due to the synchronous rotations and the earth rotation ration is approximately 27 days
Explanation:
write a motivational speech to someone who wants to become a scientist please write this as it is for kids :) PLEASEE HELP!!!!
Answers
Answer:
A motivational speech for a to be scientist. Crazy experiments and more you have the right to be whatever you adore. Your young yet strong everything will come along. I believe in you and so should you since your becoming a scientist you’ll acquire it soon. You’ll discover new things and sight to see when you become a scientist make sure to call me. :)
Explanation:
Hope it’s good I made up a couple words that rhyme good luck!
Amy weighs 35 kg and her dad weighs 85 kg. They are roller skating. Amy challenges her dad to race. They stand poised at the starting line. Her dad yells, “Go!” Who will go faster and why?
Answers
Answer:
Amy because she was less than her dad and due to the dads weight being more it'll add friction to the skates which will slow him down.
Explanation:
Answer:
Amy will win because she ways less than her dad.
Explanation:
If you put food coloring in room temperature water, the coloring spreads throughout the water.
The water causes the color to spread mainly because:
•the food coloring is heavy
•food coloring molecules are small
•the water is warm
•the water molecules are in motion
Answers
Answer: Water molecules are in motion
What question can you ask yourself if you are trying to determine if a mixture is heterogeneous or homogeneous? (This is not in the reading, so you will have to come up with your own question to tell the difference.)
Answers
Answer:
did it have more than one phase
Explanation:
this will be my question
the spreading out of waves after passing through a small opening. What is the word to this definition? HELP!!
Answers
Answer:diffraction
Explanation:
Answer:
Refelction
Explanation:
look it up that is what it says
5.0 start thanks and plx do brainly
John is pushing (horizontally) on a 100 kg bench with a force of 380 Newtons. What is the size of the friction force acting on the bench if the coefficient of static friction is 0.4? Where will the bench be 10 seconds after John starts pushing
Answers
Answer:
dx = 0
Explanation:
The Force of Friction = N * coefficient of static friction
N = m * g
=> The Force of Friction = m * g * coefficient of static friction
The Force of Friction = 100 * 10 * 0.4 = 400 (N)
The Force of Friction > The Force of John
=> It won't move!
The bench will not move because the friction force is more than john's applied force. Friction force= 392 N
Calculation
[tex]f_{k} =[/tex][tex]u_{k} *F_{N}[/tex]
where,
[tex]f_{k}[/tex] is friction force,
[tex]u_{k}[/tex] is coefficient of friction.
[tex]F_{N}[/tex] is the normal force
⇒[tex]f_{k} =0.4(100*9.8)=392 N[/tex].
Hence Force applied by john, 380N is less than the Frictional force, 392N.
What is friction?The resistance to motion of one object moving in relation to another is known as friction.It is not regarded as a fundamental force like gravity or electromagnetic.The interplay of small bumps on the surfaces of objects as they rub together is thought to be the primary source of friction, though scientists are not entirely certain of this.Particles that stick out above the rest can be found on even the most smooth surfaces.As the objects move, these high points collide and scrape against one another, creating resistance.Friction is brought on by this unwillingness to move.Sliding friction, fluid friction, and rolling friction are the three primary categories into which friction can be categorized. The items that are moving and the force being applied to them determine the type of friction.To learn more about friction, refer to https://brainly.com/question/24338873
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The sleigh is being pulled with a force of 800N and has a mass of 200 Kg.
What is the acceleration in m/s/s?
Answers
Answer:
a = 4m/s²
Explanation:
Given:
F = 800N
m = 200 kg
Unknown:
acceleration or a
Formula and solution:
a = F/m
a = 800 kg.m/s² ÷ 200 kg
Final Answer:
a = 4 m/s²
in the solution there's a two same unit and that is kg so the same unit will be cancelled and the rest is going to aapply in the answer that is 4 so if combine it the final answer is 4 m/s²
What does potential energy depend on?
Answers
Q: What does potential energy depend on?
A: Pontential energy depends on the mass of an object and it's distance.
What purpose would the sand serve?
FIRST ONE TO ANSWER CORRECTLY GETS BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass.
Explanation:
Interesting fact...
Why are there differences between the cooling rates of sand and water? Sand cools off faster than water because sand is a solid. Water heats up slower and cools off slower than sand. Sand heats up faster and cools off faster than water.
As a variable and to count as land. As if you were at a beach, this sand would count as the sand that the sun would be beaming on. ^^
-Answer
1
Record temperature of water.
Put ice in water.
Record temperature after ice melts.
2
Put ice in water.
Touch water to determine if it feels colder after ice melts.
3
Measure the mass of the water.
Put ice in water.
Measure the mass of water as ice cubes melt.
4
Determine temperature and mass of water.
Put ice in water.
Record the time for ice to melt.
A student lists some possible ways to investigate the transfer of kinetic energy using ice in a sample of water. Which procedure would be best to investigate the transfer of kinetic energy?
(1 point)
3
1
2
4
Answers
explanation:
A student lists some possible ways to investigate the transfer of kinetic energy using ice in a sample of water. The procedure would be best to investigate the transfer of kinetic energy is Determine temperature and mass of water. Put ice in water. Record the time for ice to melt. Therefore, option 4 is correct.
What do you mean by kinetic energy ?The term kinetic energy is define as the energy of motion, observable as the movement of an object. The formula of kinetic energy is as follows:
Kinetic energy = 1/2 mv²
Kinetic energy exists in every moving object and particle. Kinetic energy is demonstrated by a person walking, a soaring baseball, a crumb falling from a table, and a charged particle in an electric field.
Kinetic energy is the energy held by a moving object. Kinetic energy exists in the earth's rotation around the sun, you walking down the street, and molecules moving in space.
Thus, option 4 is correct.
To learn more about the kinetic energy, follow the link;
https://brainly.com/question/15764612
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Summarize how the eye gathers and focuses light.
Answers
Answer:
The lens of the eye is a convex lens. It fine-tunes the focus so an image forms on the retina at the back of the eye. Tiny muscles control the shape of the lens to focus images of close or distant objects. The retina is a membrane lining the back of the eye.
Summarize what you learned this week about the electromagnetic spectrum
HINT: What is it? What does it organize? How do we use these EM waves in our lives?
Answers
Answer:
I only really know the "How do we use these EM waves in our lives?" part srry
Explanation:
EM waves are used to make sure you cellphone, radio, TV, and etc. have service/ connection.
Radio waves
Microwaves
Infrared
Visible light
Ultraviolet
X-ray
Gamma ray
We use these everyday in our life however they also have dangers.
Radio waves - their long wavelength allows them to help with communication
Danger - exposure to a lot of radio waves can cause cancer or leukaemia
Microwaves - used for heating up food and transferring heat to the food.
Dangers - exposure can cause cancers and other diseases.
Infrared - can be used for remote controls and security cameras.
Danger - can cause damage to the cornea in your eye
Visible light - used for photography and optical fibres.
Danger - intense sources can cause permanent or temporary damage to the eyesight.
Ultraviolet - can be used to sterilise food and sterilise surgical equipment.
Danger - can cause skin damage and may lead to a cancer.
X-rays - used to see the internal structure of tissues and bones.
Dangers - can lead to mutations and May damage the cells
Gamma- can be used to sterilise food and surgical equipment and kill microorganisms and other bacteria.
Dangers - May reach your cells and cause cancer and cell mutations which could result in mutations.
occurs when a wave moves from one medium to another medium with diffrent properties. What is the word to this definition?
Answers
1 The drop of food coloring spreads slowly.
2 The drop of food coloring spreads very quickly.
A student places a drop of food coloring into two water samples. Her observations are shown in the table. Which statement best explains the observations in the table?
(1 point)
The water molecules of sample 1 are transferring more kinetic energy.
The water molecules of sample 1 are moving faster.
The temperature of sample 2 is close to freezing.
The temperature of sample 2 is higher.
Answers
Answer: The water Molecules of sample 1 are moving faster
Explanation:
The temperature of the sample in which the color spreads quickly is higher than sample 1. Hence, statement d is correct.
What is kinetic energy?Kinetic energy of a substance is the energy generated by virtue of its motion. It is dependent on the mass and velocity of the substance. Temperature of the system also affects the kinetic energy of substance.
According to kinetic theory of matter, as thermal energy increases, kinetic energy of the particles also increases leading to more effective collisions results in reactions.
Here, the color spreads more easily in sample 2 because the higher temperature of the solution provide enough thermal energy for the liquid particles to gain kinetic energy to easily move through the solution. Thus, statement d is correct.
To find more on thermal energy, refer here:
https://brainly.com/question/11278589
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find the answer and ty =
1322/243+2-365
Answers
it’s negative ^^
X-Rays can reveal an objects temperature since temperature determines the wavelength of its radiation. The ________ the object, the _________ the wavelength is.
PLEASE HELP!
Answers
Answer: I think the answer is "hotter" the "bigger"
Explanation:
X-Rays can reveal an objects temperature since temperature determines the wavelength of its radiation. The HOTTER the object, the BIGGER the wavelength is because if tempeture determines wavelength then the hotter it is the bigger the wavelength would be and vice versa. Hopefully that helped. im not 100% sure.
HELP NEEDED
What would be an example of something being brittle? *
a fishing pole
a bowling ball
a cupcake
an airplane
Answers
Answer:
Explanation:
A fishing pole maybe?
Answer:
A aieplane
Explanation:
Because brittle means hard but liable to break or shatter easily.
examples of positive effects of fluid forces
Answers
Answer:
fluid dynamic forcesln physics fluid mechanicsPls Help, This is Physical science, and it involves math, and funny thing math is my weakspot, so pls help me, the pic is down below
Answers
Answer: For forces on flat rigid bodies such as a wall, it is less direct in the calculation of work done as force times distance or displacement compared to other situations. You will have to calculate the pressure exerted first which will be P = F/A, where F is the force as above in Newtons, and A is the area of the wall first. There should also be a pressure limit for the wall in question based on what it is composed of and its dimensions from structural mechanics. The exerted force must exceed the upper limit of tolerated force to break the wall. In any case even without breaking the wall, using very accurate optical technology you can estimate the displacement now a days however minute, or the change in the form of volume of displacement also due to the pressure. Here Work done can be given still as follows : W = F •d, or W = P •V, or W = (F/A)•V. Here V will be the approximate
Explanation: i hope this helps
PLS HURRY! `WILL GIVE BRAINLIEST TO FIRST ANSWER
Which factor can decrease the kinetic energy of an object? (3 points)
Increase in speed
Decrease in speed
Increase in temperature
Decrease in volume
Answers
Answer:
Decrease in speed
Explanation:
Increasing an object's velocity can decrease kinetic energy. *The velocity of an object has no effect on kinetic energy. *Increasing an object's velocity can increase kinetic energy. Increasing an object's velocity can increase kinetic energy.
X-Rays at different wavelengths provide scientists studying objects in space with information about which of the following?
object temperature
object composition
object density
magnetic field of an object
All of the above.
Answers
Answer:
object composition
Explanation:
List each layer of the earth, starting at the crust, and identify one characteristic of each layer.
Answers
Answer:
Hope it helps
Explanation:
The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases
The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate.
calcium + zinc carbonate → calcium carbonate + zinc
According to the law of conservation of matter, how much zinc is present in the product?
Group of answer choices
74 grams
98 grams
88 grams
64 grams
Answers
162-152=10
64+10=74
So 74 grams is the answer