Answer: By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate. Ocean currents are also critically important to sea life.
Explanation: Plzz mark me as brainliest !!
What would be the daughter product of the beta decay of lead-212 and what would be the daughter product of the alpha decay of polonium-216?
Answer:
lead with Z = 82 is transformed into Bismuth with Z = 73
The Po with Z = 84 becomes Pb with Z = 82
Explanation:
Beta decay occurs when a neutron emits an electron and an anti neutrino from the atomic nucleus, therefore the atomic number of the material increases by one unit.
Pb + e + ν → Bi
lead with Z = 82 is transformed into Bismuth with Z = 73
In alpha decay, a helium nucleus is emitted from the nucleus of the atom, therefore the atomic number decreases by two units.
Po +α → Pb
The Po with Z = 84 becomes Pb with Z = 82
Imagine you are a water molecule, carbon atom, or nitrogen atom that is inside a cow. Write a brief explanation of how you got from the atmosphere (the air) into the biosphere (the living cow). *
Answer:
Explanation:
The processes involved in each of the molecules involved are different.
For example, water molecules that have condensed in the atmosphere (in the cloud) return back to the earth through precipitation in the form of rain water. These cows drink these water from various water bodies around them. This is one process in which water molecules move from the atmosphere into the living cow.
In the case of carbon and nitrogen atoms; the air the cow breath in consists of nitrogen, oxygen, carbon dioxide and some other gases. These gas molecules move (from the atmosphere) into the cow through the process of respiration.
1 kg ball and a 9 kg ball have the same Ex. Compare
their speeds.
Answer:
The speed of 1 kg ball is 3 times of the speed of 9 kg ball.
Explanation:
It is given that, 1 kg ball and 9 kg ball have the same kinetic energy.
We need to compare their speeds.
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
Where
m is mass and v is speed
As kinetic energy is same. So,
[tex]m_1v_1^2=m_2v_2^2\\\\\dfrac{v_1^2}{v_2^2}=\dfrac{m_2}{m_1}\\\\\dfrac{v_1^2}{v_2^2}=\dfrac{9}{1}\\\\\dfrac{v_1}{v_2}=\dfrac{3}{1}\\\\v_1=3v_2[/tex]
So, the speed of 1 kg ball is 3 times of the speed of 9kg ball.
What is the power of a crane that does 5.60 kJ of work in 2.80 s?
Answer:
2000 WExplanation:
The power of the crane can be found by using the formula
[tex] p = \frac{ \orange{w}}{ \orange{t}} \\ [/tex]
w is the workdone
t is the time taken
From the question we have
[tex]p = \frac{5600}{2.8} \\ [/tex]
We have the final answer as
2000 WHope this helps you
If a body is sliding on a inclined plane of angle 30° angle of friction is
Answer: don´t know
Explanation:
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A 20-kg dog on ice skates is accelerating at 2 m/s2. What is the net
force on the dog?
Answer:
22
Explanation:
please help!!!!!!!!!!
Answer:
the line b aka the option d
Explanation:
NEED HELP ASAP, WILL GIVE BRAINLIEST
Which phrase describes air pressure?
decreases with denser air
decreases as altitude decreases
equals mass divided by volume
decreases as a result of fewer air particles pushing down
Answer:
decreases with denser air
Answer:
b) decreases as altitude decreases
Explanation:
There is a species of Darwin’s finch on the Galapagos Islands that can exert a force of 205N with its beak as it cracks open a seed case. If its beak moves through a distance of 0.40 cm during this operation, how much work does the finch do to get at the seed inside the case?
Answer:
0.82 J
Explanation:
We know that work done W = Fd where F = force and d = distance moved in the direction of the force.
Now, the finch on Galapagos Islands exerts a force of 205 N with its beak as it cracks open a seed case. So, F = 205 N. If the beak moves a distance of 0.40 cm during this operation, then d = 0.40 cm = 0.004 m.
We now compute W.
So, W = Fd
= 205 N × 0.004 m
= 0.82 J
So the finch does work of 0.82 J to get at the seed inside the case.
If a book has a mass of 3 kg, what is the book's weight in N?
Answer:
29.4 N
Explanation:
F = ma
F = (3 kg) (9.8 m/s²)
F = 29.4 N
A 2kg ball is thrown with an acceleration of 15m/s2. A 2kg ball is thrown with an acceleration of 10m/s2. Which ball
will have a greater net force? Calculate the net force of both balls to justify your answer.
what change should a rahul make
Answer:
Whats a rahul?
Explanation:
I'll edit this once I know :)
Answer: its B
Explanation: just took the quiz
A 25 N force is used to push a box across a floor against a frictional force of 14 N. The box accelerates from rest to a speed of 4 m/s in 16 s. What is the mass of the box?
todjghozjfh-xjdfg .FExplanation:dthgzdfhsfhfh
dhfhdfhdfhhdffhd
A hot-air balloon is ascending at a rate of 7.5m/s when a passenger drops a camera. If the camera is 27m above the ground when its dropped, how much time does it take for the camera to reach the ground? What is its velocity just before it lands?
Answer:
v_{f}=21.75[m/s] (velocity just before it lands)
t = 2.98 [s]
Explanation:
The key to solving this problem is the initial velocity since when the camera falls it is moving up, we will take this velocity as negative and the acceleration gravitation down as positive.
We will use the following equation of kinematics to solve this problem.
[tex]V_{f}^{2} =V_{o}^{2}+2*g*y[/tex]
where:
Vf = final velocity [m/s²]
Vo = initial velocity = 7.5 [m/s]
g = gravity acceleration = 9.81 [m/s²]
y = elevation = 27 [m]
[tex]v_{f}^{2} = - (7.5)^{2} +(2*9.81*27)\\ v_{f}^{2} = 473.5\\v_{f}=\sqrt{473.5}\\v_{f}=21.75[m/s][/tex]
Now using the following equation of kinematics, we can calculate the time that the fall lasts.
[tex]v_{f}=v_{o}+g*t[/tex]
[tex]21.75 = -7.5 +9.81*t\\9.81*t = 29.25\\t = 2.98[s][/tex]
Hi thanks to whoever answers thanks! will give brainliest
How long does it take for an 8 kg pumpkin to hit the ground if dropped from a height of 55 m.
Answer:
t = 3.35 s
Explanation:
It is given that,
Mass of a pumpkin, m = 8 kg
It is dropped from a height of 55 m
We need to find the time taken by it to hit the ground.
Initial velocity of the pumpkin, u = 0
Using second equation of motion to find it as follows :
[tex]h=ut+\dfrac{1}{2}at^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2(55)}{9.8}} \\\\t=3.35\ s[/tex]
So, it will take 3.35 seconds to hit the ground.
Water is boiled. The resulting steam is blown again huge turbine blades. The turbine blades spin in a magnetic field, producing electricity. The electricity is used to light a lamp. Describe the energy conversions involved.
Answer:
Explanation:
A turbine is a mechanical device that can be used for the conversion of one form of energy into another.
The boiled water generates thermal energy which is blown against a huge turbine blades. The thermal energy is converted to mechanical energy (which drives the blades of the turbine), and sound energy in the turbine. The spinning blades thereby cut the magnetic field as they rotates inducing electric current (Fleming's left hand rule), thus electrical energy is produced.
The electrical energy is now converted to light energy and heat energy by the lamp.
Pls help! What would be considered an antonym for law of superposition??
Answer:
do you have any pictures or any answers we can choose from?
Explanation:
This is an incomplete question.
What is the momentum of an 18-kg object moving at 0.5m/s
Answer:
Momentum = 9kgm/s
Explanation:
Given the following data;
Mass = 18kg
Velocity = 0.5m/s
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex] Momentum = mass * velocity [/tex]
Substituting into the equation, we have;
Momentum = 18 * 0.5
Momentum = 9kgm/s
Therefore, the momentum of the object is 9kgm/s.
The process repeats, producing a
within the gas.
Please help asap
Answer:
Energy materials are traditionally made with a linear approach—materials are taken, products are made, and when they expire or break, they are disposed of. The process repeats.
Explanation:
This may help I don't know
please help!!!!!!!!!!
Answer:
D
Explanation:
I might be wrong but if I was you i would go with D
A 3.0 kg block is pushed 2.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 28.0. with the horizontal, as shown in the figure.
The acceleration of gravity is 9.81 m/s^2. If the coefficient of kinetic friction between
the block and the wall is 0.40, find
a) the work is done by the force on the block.
Answer in units of J.
b) the work done by gravity on the block.
b) the work done by gravity on the block.
Answer:
a) [tex]w_{Fy} = 237.61713[/tex]J
b) [tex]w_{g}=-58.86[/tex] J
c) [tex]N=223.44641[/tex]N
Explanation:
Key: theta = θ kinetic friction = μ α = 180°
a) Work of Force put on block
Remember that you need both sides x & y
Equations:
[tex]w_{F}=F_{x} cos[/tex] | [tex]w_{F}=F_{y} sin[/tex]θ[tex]_{net} F_{x} =0[/tex] | [tex]_{net} F_{y} =0[/tex] [tex]N=Fcos[/tex]θ | [tex]F_{y} sin[/tex]μ[tex]N-mg=0[/tex] | [tex]F_{y} sin[/tex][tex]F_{y} =\frac{mgd sin(theta)}{sin(theta)-(kinetic friction)cos(theta)}[/tex]-μ[tex]Fcos[/tex]θ[tex]=mg[/tex] |[tex]w_{Fy} =Fdsin[/tex]θ | [tex]w_{Fy} =\frac{(3*9.81)sin(28)}{sin(28)-(0.40)cos(28)}[/tex] | [tex]w_{Fy} = 237.61713[/tex]Jb) Work of Gravity on block
[tex]w_{g} =F_{g}dcos[/tex]α [tex]w_{g} =mgdcos[/tex]α [tex]w_{g}=(3)(9.81)(2)cos(180)[/tex] [tex]w_{g}=-58.86[/tex]Jc) Magnitud of Normal Force
[tex]F=\frac{mg}{sin(theta)-(kinetic friction)cos(theta)}[/tex][tex]F=\frac{3*9.81}{sin(28)-(0.40)cos(28)}[/tex][tex]F = 253.06871[/tex][tex]N=Fcos[/tex]θ[tex]N=(253.06871)cos(28)[/tex][tex]N=223.44641[/tex]NHope it helps
If a car has a constant acceleration of 4 m/s², starting from rest, how far has it traveled after 5 seconds?
Answer:
100 meters
Explanation:
d=at^2 correct? So you plug in acceleration and time. d=(4)(5)^2 which when using pemdas turns out to 100 meters.
1. What is the wavelength of a sound wave with a frequency of 50 Hz, if the Speed of sound is 343 m/s.
2.A sound wave in a steel rail has a frequency of 620 Hz and a wavelength of 10.5 m. What is the speed of sound in steel?
3.A wave has a frequency of 10 Hz and a wavelength of 30m. What's its speed?
1.6.86
2.59.04
3.3
Thats the answer I think
3. Light travels from the Sun to Earth in 8.3 min. Given that the speed of light is 3.00108 m/s, what is the distance in meters between the Sun and Earth?
Answer:
13
Explanation:
13.0120481928 it is the distance
What has occurred when a solid forms out of the mixing of two liquids in a chemical reaction?
O melting
O gas formation
O combustion
O precipitate formation
Answer:
D is the correct answer
Explanation:
solid is a new substance, and it's called a precipitate.
The precipitate formation is occurred when a solid forms out of mixing two liquids. Hence, precipitate formation is the correct option.
The given problem is based on the chemical reactions and substances formed due to the chemical reactions. The given question says that some solid substance forms out of mixing two liquid substances in a chemical reaction. Now, let us analyze the options:
Melting is the process of conversion of solid substance into liquid substance upon the absorption of heat. Since some solid substance as per the given problem. So clearly melting is not correct option.The gas formation clearly highlights that some gaseous substance is forming. So despite of formation of solid substance in the problem, the gas formation is not the correct option. Combustion involves the production of heat and light, which are not under the category of solid substance. Hence, combustion is not the correct option.Precipitates are the solid substances that are formed in a chemical reaction between the reactants (liquids). Hence, this justifies the given problem and precipitate formation is a correct option.Thus, we can conclude that precipitate formation is occurred when a solid forms out of mixing two liquids.
Learn more about the precipitate formation here:
https://brainly.com/question/19487269
Is it true or false that A proton traveling to the right moves in between the two large plates. A vertical electric field, pointing downwards with magnitude 3.0 N/C, is produced by the plates, the field points is in the same direction on the proton as the force felt by a positive test charge
Answer:
False
Explanation:
In the question it is given that a proton travels in the right moves in between the two plates. An electric field that is pointing in the vertically upward direction has magnitude of 3 N/C. The electric field is produced by the plates.
Now from here we can conclude that the direction of the force acting on the proton when the proton is in between the plates acts in the downward direction. While the electric field lines points in the upward direction. Thus the electric point will not be in the direction of the force that acts on the proton.
Where do we get the matter for us to grow?
Answer:
We get mater to grow by eating food, drinking water and breathing in oxygen
Explanation:
Growing shows an increase in size or mater of a living organism over time, such that the present state of a living organism has an increased amount of matter or inertia than its previous status.
However, by the law of conservation of mater, the amount of mater in a closed system is constant, therefore, we have that for us to grow, new mater must be ingested, which comes from what we take into our bodies
Therefore, we get mater to grow by eating food, drinking water and breathing in oxygen
What is the difference in degrees
Celsius between the hottest stars and the
coolest stars?
Answer the following
Answer: There is nothing here
Explanation: Could you please add a picture or something