Answer:
Radioactive contamination
Explanation:
radioactive contamination is when radioactive atoms are present on somethingWhen an unwanted material that contains radioactive atoms is present in another material is known as Radioactive contamination.
What are radioactive atoms?The process of radioactive decay is how an unstable atomic nucleus loses energy through radiation. A substance that has unstable nuclei is regarded as radioactive. Alpha, beta, and gamma decay are three of the most prevalent forms of decay, and they all entail the emission of one or more particles.
According to the statement, "For a given time, the number of nuclei of the elements existing at that moment is exactly proportional to the rate of radioactive decay of an atom." This may be expressed as, where N is the total number of nuclei, d N d t N.
When radioactive particles are deposited on, inside of, or around an individual or a business, nuclear radiation results. When radioactive materials are discharged into the environment, they have the potential to contaminate the air, water, surfaces, soil, plants, buildings, people, and animals.
More about the radioactive atoms link is given below.
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What is the mass of a dog running at a speed of 5 m/s and a momentum of 120.5 kgm/s?
Given:
Momentum of the dog (p) = 120.5 kg m/s
Speed of the dog (v) = 5 m/s
To Find:
Mass of the dog (m)
Concept/Theory:
[tex] \underline{\underline{ \bf{\Large{Momentum}}}}[/tex]
It is defined as the quantity of motion contained in a body.It is measured as the product of mass of the body and it's speed.It is represented by p.It's SI unit is kg m/sMathematical Representation/Equation of Momentum: [tex] \boxed{ \bf{p = mv}}[/tex]Answer:
By using equation of momentum, we get:
[tex] \rm \longrightarrow m = \dfrac{p}{v} \\ \\ \rm \longrightarrow m = \dfrac{120.5}{5} \\ \\ \rm \longrightarrow m = 24.1 \: kg[/tex]
[tex] \therefore [/tex] Mass of the dog (m) = 24.1 kg
How does the change in the state of matter occur? Write with example
Answer:
When matter changes from one state to another, it either absorbs energy—as when chocolate melts—or loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid again.
Explanation:
hope it helps u
The Earth's diameter at the poles is _____.
equal to its diameter at the equator
greater than its diameter at the equator
less than its diameter at the equator
Answer:
less than its diameter at the poles
hope this helps. have a great day! :)
By comparing fossils of a species from long ago to those of today, we can conclude that *
1 point
fossils show no evidence of relationship between the past and present.
past species were more likely to be fossilized than today's.
today's species evolved from those of the past.
present species live longer.
Answer:
today's species evolved from those of the past.
Explanation:
By comparing fossils of a specie from long ago to those of today, we can conclude that today's species evolved from those of the past.
Fossils are the preserved remains of ancient life forms found within sedimentary bed layers. These fossils helps scientists to understand ancient life forms. According to the discovery of Charles Darwin, organisms have evolved and are still evolving. Understanding past life forms gives a way to characterize present day species better.Which of the following periodic properties increases as you move from left to right across the periodic table?
A.
nuclear charge
B.
All of these answer choices are correct.
C.
electron affinity
D.
electronegativity
Answer:
the answer choice is B
Explanation:
as we move from left to right , the atomic size decreases due to higher number of protons in the nucleus, which are able to attract the electrons more strongly. and so the electronegativity and electron affinity increases for the same reason. the nuclear charge increase due to more protons , and without an increase in inner electrons , there is less shielding effect. so effective nuclear charge increases.
Answer: B. electronegativity
Explanation: Electronegativity generally increases as you move of the periodic table and as you move to the right. All the other answers listed decrease as you move up a column of the periodic table.
What is the mass of a car traveling at 5.6 m/s with a momentum of 3723 kg*m/s?
Answer:
m = 664.821 kg
General Formulas and Concepts:
Physics
p = mv
p = momentumm = mass (kg)v = velocity (m/s)Explanation:
Step 1: Define variables
m = unknown
p = 3723 kg * m/s
v = 5.6 m/s
Step 2: Find mass
3723 kg * m/s = m(5.6 m/s)
m = 664.821 kg
When dividing, m/s and m/s cancel out to leave kg as our final answerAn object needs a force of 152 Newtrons to move 8 meters. How much work is required?
Answer:
960J
Explanation:
Given parameters:
Force = 120N
Distance = 8m
Unknown:
Work required = ?
Solution:
The work done by a body is the force applied to move a body in a specific direction.
Work done = Force x distance
Insert the parameters and solve;
Work done = 120 x 8 = 960J
who wants to be my freind
Meeeeeeeee............!
i need help this is due to day!! i will give brainliest
Answer:
One arm row: Latissmus Dorsi (Lat)
Dumbell flys: Shoulders
Machine back press: pectorals
Push downs: Triceps
Explanation:
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How does temperature influence chemical change
Answer:
yes
Explanation: if temperature is higher the reactants have more kinetic energy make the chemical reaction faster
Answer:
increasing the temperature will cause chemical changes to occur faster
Decreasing the temperature, causes the particle to lose energy which causes them to move around less and slower
Someone please help will mark as brainliest
Answer:
yes I agree to his opion cause freedom is important just like everyones rights and if you give up hope i think he means if you give up hope, hope is lost you kind lost everything else
Explanation:
hope it helps a little :)
Here is the picture of an aircraft, with the forces working on it shown. Identify the force that corresponds to the question mark.
A. Buoyancy
B. Atmospheric pressure
C. Gravity
D. Density
The force corresponds to the question mark in the given figure is known as Gravity. Hence, option (C) is correct.
The given problem is based on the concept of equilibrium of forces. The forces that causes the net motion of an object to be zero, is known as equilibrium of force.
In the given problem, the lift of an aircraft will be due to the Buoyant force due to the air as a medium. The drag acting the opposite direction of motion of aircraft, tends to resist the motion. The thrust force acting on the aircraft is due to the component of aircrafts, which causes the aircraft to move forward.And the question mark shown in problem is somehow pointing the gravitational force, which always acts in downward direction. And gravitational force highlights the gravity.Thus, we can conclude that the force corresponds to the question mark in the given figure is known as Gravity. Hence, option (C) is correct.
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why the unit of power is called derived unit?
The energy stored inside a battery is best described as...
a. potential energy
b. Elastic
c. Mechanical
d. Kinetic
Answer:
potential energy
Explanation:
by the sun
In what ways is thermal energy transferred during physical and chemical changes
Explanation:
chemical changes
>produce new substances w/ different chemical structure/ properties
> thermal energy can be used to BREAK bonds (endothermic)
>thermal energy can be transferred to a chem rxn to help form new products (endothermic)
> heat can be released by an exothermic chemical reaction (excess energy- the total energy used to break bonds is less than energy released in forming new bonds)
physical changes
>does not result in new substances (typically changes in state- solid, liquid, gas)
> thermal energy can be transferred to EVAPORATE water (add thermal E... water (liquid) to steam (gas)) or FREEZE water (remove thermal E... water (liquid) to ice (solid))
Question 6 of 10
What is the frequency of a wave that has a wavelength of 0.20 m and a speed
of 22 m/s?
A. 4.4 Hz
B. 110 Hz
C. 0.23 Hz
D. 0.001 Hz
Answer: Try A. 110 Hz
Explanation:
Answer:
i got 110 Hz..
Explanation:
Where can I find springs that are the same size as the ones in a mechanical pencil
Answer:
Staples, Bestbuy, Maybe Homedepot
Explanation:
Answer:
find the mechanical pencil on amazon
Explanation:
amazon has everything!
HOPETHIS HELPS!
brailiest? please....
The path in which the current flows is
A.
Open
B.
Closed
C.
Semi opened
D.
Semi closed
E.
None of the above
Answer:
B. closed
Explanation:
Charges flow through a closed path called a circuit. Current flows because negatively charged particles are attracted to positively charged particles at the other end of the circuit.
Hope this helped, Have a Wonderful Day!!
Write some harms of friction.
Answer:
Friction produces unnecessary heat leading to the wastage of energy. The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches. However, friction can also cause problems in a car. Friction between moving engine parts increases their temperature and causes the parts to wear down. Friction can be both harmful and helpful, so it may be necessary to decrease or increase friction.
Answer:
Friction had many disadvantages and these are the har,s of friction too.
Explanation:
Disadvantages of friction are mainly forest fires, decreasing life expectancy of vehicles, damages many machines, generates heat, wear and tear, wastage of force/energy, etc. When two things in a forest rub against each other through an amount of force, friction will be present and it will cause a spark. This spark will be continued into a fire because of other materials like wood in the forest causing a forest fire. Secondly, vehicles work through moving many internal machines in them; this again includes friction and friction can damage the machines so to prevent it ppl grease the machines. decreasing life of vehicles is just a larger view of damaging the machines as this disadvantage of friction can be used anywhere. Wastage of force/ energy because when we roll a ball on a surface we have to put force on the ball to make it move forward but because friction moves in the opposite direction energy/force will be wasted there. Generating heat and wear & tear are some factors of friction which is also a harm.
Can someone please help. I need to turn it in soon. Thanks.
Do you think the government should ever get involved in limiting population? Why or why not?
Answer:
No!!
Explanation: I think the government shouldn't get involved with limiting population!! i think that as long as you can care and supply your family it is your choice how larger your family is!
A bus goes from rest to 20 m/s. The bus accelerates at 2 m/s^2. How far does the bus go?
Which of these structures is the most superior?
the mouth
the adam's apple
the belly button
the nose
A person or object may have stored energy because of its
Answer:
A person or object may have stored energy because of its....
potential energy
A person or object may have stored energy because of its position and the energy is called potential energy.
What is potential energy?The relative positions of different system components determine the potential energy, which is stored energy. When a spring is compressed or stretched, its potential energy increases.
If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised.
Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the elevated ball has more potential energy as they become further apart.
In systems having components whose forces on one another rely on their configuration, or relative positions to one another, potential energy is generated.
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9) Zane has an elastic water balloon launcher that can fire balloons at an angle of [38.0o] from the surface of the ground. If the initial velocity is 25.0 m/s, find how far away are the balloons are from the launcher when they hit the level ground again.
Answer:
127.6 m
Explanation:
Given that Zane has an elastic water balloon launcher that can fire balloons at an angle of [38.0o] from the surface of the ground. If the initial velocity is 25.0 m/s,
The horizontal initial velocity will be:
U = 25cos38
U = 19.7 m/s
To find how far away are the balloons are from the launcher when they hit the level ground again, we will first calculate the total time spent before using the range formula
To calculate the total time, let's use the formula below:
T = 2U/g
T = (2 × 25)/9.8
T = 50/9.8
T = 5.1s
Range = UT
Since horizontal acceleration = 0
Range = 25 × 5.1
Range = 127.55 m
Therefore, the balloons are approximately 127.6m away from the launcher when they hit the level ground again
Three people are pulling on a crate , but the crate isn’t moving (it’s at rest ) :Robert and Rachel are pulling to the Right , while Larry is pulling to the Left. If Robert is pulling with force of 74 N, and Larry is pulling with a force of 106 N , how much is Rachel’s force ?
Answer:32
(im not sure if this is right but im just gonna try and explain.)
Explanation: If Larry and the two other people are both pulling at the same force, it wouldn't be able to move.
It is important to increase your flexibility.
true or false?
Answer:
true
Explanation:
is an important component of physical fitness and has many positive effects on the body
Answer:
It's True
Developing flexibility helps yourself:
Fewer injuries. Once you develop strength and flexibility in your body you'll be able to withstand more physical stress.Less pain.Improved posture and balance.A positive state of mind.Greater strength.Improved physical performance.For more question about the topic click/copy the link below:
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https://brainly.ph/question/171899
A bicycle of mass m requires 50 J of work to move from rest to a final speed v. If the same amount of work is performed during the same amount of time on a bicycle with a mass of 2m, what is the final speed of the second bicycle?
Answer:
The final speed of the second bicycle is (v·√2)/2
Explanation:
The mass of the given bicycle = m
The amount of work required to move the bicycle from rest to speed v = 50 J
The final speed of the first bicycle = v
The mass of the second bicycle = 2m
Therefore, from conservation of energy, we have;
Work required by the first bicycle = Kinetic energy gained by the bicycle
The kinetic energy = 1/2·m·v²
∴ Energy required by the first bicycle = 50 J = 1/2·m·v²
Given that the same amount of work is performed on the second bicycle, we have;
Work performed on the second bicycle = 50 J = kinetic energy of second bicycle = 1/2·(2·m)·v₂²
Also, given that 50 J = 1/2·m·v², we have;
Work performed on the second bicycle = 50 J = 1/2·m·v²= 1/2·(2·m)·v₂²
1/2·m·v²= 1/2·(2·m)·v₂²
m·v² = 2·m·v₂²
v² = 2·v₂²
v₂ = √(v²/2) = v/√2 = (v·√2)/2
v₂ = (v·√2)/2
The final speed of the second bicycle = v₂ = (v·√2)/2.
If a permanent magnet picks up a steel paper clip, the paper clip also
becomes a magnet. How does an electromagnet differ from the magnetized
paper clip?
Answer:
An interaction between electricity and magnetism produces an electromagnet, while a permanent magnet induces the paper clip's magnetic field.
Explanation:
A p e x :)
A sample of a solid nonmetal is compared to a sample of a solid metal. Both samples have the same volume. What is
the most likely difference between the two samples?
The nonmetal has more mass.
O The nonmetal takes up more space.
O The metal has more mass.
O The metal takes up more space.
Plzzz help !!!
Answer:
Ok I’m not pretty sure but I think it’s C but look for more answers first before you put C because I don’t want you to get it wrong. :)
Explanation:
Answer:
i think the answer is The nonmetal takes up more space.
Explanation:
i hope this helps