What is the kinetic energy of a ball at rest with a mass of 10 Kg?
а 100j
b 0j
c 10j
d 1000j
Answer:
B 0j
Explanation:
It is at rest, not moving
Which of the following is a subatomic particle?
Particle
Atom
Neutron
Element
Answer:
neutron.
Explanation:
subatomic particles include,
neutron.
proton.
electron.
hope it helps. :)
What is the difference between science and pseudoscience?
A. Pseudoscience is based on observation, while science is based on experimentation.
B. Pseudoscience conclusions are based on empirical evidence, while scientific conclusions are not.
C. Science is based on observation, while pseudoscience is based on experimentation.
D. Scientific conclusions are based on empirical evidence, while pseudoscientific conclusions are not.
Answer:
b?
Explanation:
Which location on the map above is a source of North Atlantic deep water?
A
B
C
D
If a spring is stretched to twice the lengtj of its equilibrium position, by what factor does the energy stored in the spring change?
Answer:
the energy increases 4 times
Explanation:
A spring has an elastic potential energy that is given by the expression
K_e = ½ K (x-x₀)²
where x is the distance from the equilibrium point and k is the return constant
if the spring is stretched at x-x₀ = 2x₀, the energy value
K_e = ½ k (2x₀)²
K_e = ½ k 4 x₀²
K_e = 4 (½ k x₀²)
[tex]\frac{K_e}{ \frac{1}{2} k x_o^2}[/tex] = 4
therefore the energy increases 4 times
The energy stored in the spring changes by a factor of 4
The formula for calculating the energy stored in the spring is expressed as:
[tex]E=\frac{1}{2}ke^2[/tex]
If the spring is stretched to twice the length of its equilibrium position
[tex]E_2=\frac{1}{2}(2k)^2\\E_2=\frac{1}{2}4k^2[/tex]
Take the ratio of the energy stored in the spring
[tex]\frac{E_2}{E} =\frac{1/2(4kx^2)}{1/2kx^2}\\ \frac{E_2}{E} =\frac{4}{1}\\E_2 = 4E[/tex]
This shows that the energy stored in the spring changes by a factor of 4
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Write two reasons for using mercury in a thermometer ️️
Answer:
my first reason is that Mercury is the only one in liquid state at room temperature and thermometers because it has high coefficient of expansion . my second reason is that mercury its can changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale, and also Mercury thermometers can be used to determine body, liquid, and vapor temperature.
Which two criteria are least important for engineers to consider when developing a process to produce sulfur trioxide? A. The process should produce a high output of products.
B. The process should provide outputs for multiple needs.
C. The process should already be well established.
D. The process should be environmentally friendly.
Answer:
c and b
Explanation:
what is the instrument used to measure radiation
match the quote about working in government to the correct branch. Then name
the article that describes the powers of this branch.(Giving Brainlist and doubling points for Correct answer!)
Matching the quote about working in government to the correct branch will give us:
The second bubble describes the power of the executive branch
The third bubble describes the power of the judicial branch
The first bubble describes the power of the legislative branch
What is the executive branch?The power of the Executive Branch is vested in the President of the United States, who also acts as head of state and Commander-in-Chief of the armed forces.
The executive branch or is the part of government that enforces law, and has responsibility for the governance of a state.
In political systems based on the principle of separation of powers, authority is distributed among several branches (executive, legislative, judicial)—an attempt to prevent the concentration of power in the hands of a single group of people.
The executive enforces the law as written by the legislature and interpreted by the judiciary.
The executive can be the source of certain types of law, such as a decree or executive order. Executive bureaucracies are commonly the source of regulations.
What is the judicial branch?The third branch of government is the Judicial branch. The Judiciary is made up of courts -- Supreme, Circuit, the magistrate (local) and municipal (city) courts. The Judicial branch interprets the laws.
The state judges are elected by the citizens rather than being appointed. They also run for their office as members of a political party.
The judiciary is the system of courts that interprets, defends, and applies the law in the name of the state. The judiciary can also be thought of as the mechanism for the resolution of disputes.
In many jurisdictions, the judicial branch has the power to change laws through the process of judicial review.
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Which chemical equation obeys the Law of Conservation of Mass?
A. 2NO2 → O2 + N2
B. 2NO2 → O2 + 2N2
C. 2NO2 → 2O2 + N2
D. NO2 → O2 + N2
Answer:
c according to me the correct answer is C
Which of the following will predict what would happen if the scuba tank were to increase in temperature?
A.
The pressure exerted by the gas in the tank would increase.
B.
The density of the gas in the tank would increase.
C.
The size of the gas particles in the tank would increase.
D.
The number of particles in the tank would increase.
Answer:
Its A
Explanation:
Because the pressure exerted by the gas in the tank would increase.
The statement that predicts what would happen if the scuba tank were to increase in temperature is that pressure exerted by the gas in the tank would increase.
What is the relationship between pressure and temperature?The pressure and temperature of a gas in a container is connected by the pressure law equation, which states as follows:
P1/T1 = P2/T2
This equation depicts that an increase in the pressure of a gas also increases the temperature.
Therefore, the statement that predicts what would happen if the scuba tank were to increase in temperature is that pressure exerted by the gas in the tank would increase.
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The center of Mars is called the mantle true or false
Answer:
Central core
Explanation:
if volume is constant and heat is added, what happens to the
temperature and pressure?
- increases
- decreases
- stays the same
Answer:
the temperature would Increase and pressure would increase
Explanation:
This would occur because the temperature would move to the liquid through conduction and the pressure would increase because the heat would cause more and more pressure
Why do you think lightning is so dangerous if it strikes a person?
Do you remember the old fashioned flashlights, before there were LEDs ?
They had two or three heavy batteries in the tube, and one little tiny glass light bulb in the middle of the little headlight in the front. When the batteries were fresh, that little light bulb gave out a nice bright beam of light, and drew about 0.7 Amperes from the batteries. That's the number I want you to remember for a couple of minutes: Flashlight bulb, 0.7 Amperes.
-- The wiring (nerves) that operate your heart can go haywire, and your heart can stop or go crazy, if 0.015 Amp of current or more happens to pass close by it.
-- The muscles in your arms or legs, or your diaphragm that makes you breathe, can lock up so that you can't control them, if 0.1 Amp of current or more happens to pass by them. If that current is 0.5 Amp or more and passes close to a muscle, the muscle can lock up so violently that it breaks the arm- or leg-bone that it's attached to.
Lightning is electric current flowing between a cloud and the ground. If anything is in the path it wants, it just flows right on through.
Lightning may flow in either direction ... up to the cloud or down to the ground. It really doesn't make any difference. The effects are the same, on anything it decides to flow through.
The current in a typical, average lightning bolt is 30,000 Amperes. A lot of them are bigger.
Current flowing through anything causes heat to be generated.
The more current = the more heat.
-- Lightning flowing through the wall of a house generates enough heat inside the wall to make the wall explode.
-- Lightning flowing through the juice inside a tree generates enough heat to boil the tree juice, and explode the tree.
-- Lightning flowing through the air heats a skinny tube of air so hot and so fast that the air explodes. That makes a strong sound wave in the air, that can be heard from miles away. It's called "thunder".
-- A person is made of lots of nice soft, moist, mushy stuff, water, juices, and air. A thousand Amperes flowing through it all can do a fast, efficient, complete job of heating it, boiling it, cooking it, exploding it, and tearing it to pieces.
Sounds dangerous to me.
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Which of the following methods of soil conservation uses the roots of plants as anchors in the soil? (5points)
Group of answer choices
Adding fertilizers to soil
Planting trees on sloped surfaces
Adding beneficial organisms to soil
Watering grasses to add moisture
Answer:
Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.
Answer:
Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.
Two foam peanuts become equally charged as they fall out of a cardboard box. Each foam peanut carries a charge of 8 x 10^-4 C. If the peanuts are 0.05 m apart, what is the electric force between them? Assume that k = 9 x 10^9 Nm^2/C^2. Use Coulomb’s law equation: F = kq1q2/r^2.
A. 115,200 N
B. 2,304,000 N
C. 0.000000434 N
D. 0.0000086 N
Answer:
Answer labeled B : 2,304,000 N
Explanation:
Recall the formula for the electric force:
[tex]F_e=9\,\,10^9\, \, \frac{q_1*q_2}{d^2} \\F_e=9\,\,10^9\, \, \frac{8\,10^{-4}*8\,10^{-4}}{0.05^2} \\F_e=2,304,000\,\,N[/tex]
which agrees with answer B provided.
Two balls marked with question marks, right and left. The left ball has arrows emerging in all directions but to the right and all arrows either point to the left or immediately bend toward the left after emerging. The right ball has arrows emanating in all directions but to the left and all arrows either point to the right or immediately bend toward the right.
Use the drop-down menu to complete the statement.
Based on the field lines, the electric charges indicated by the question marks are?
a) the same
b) the opposite
Answer:
B
Explanation:
Answer: A: the same
Explanation: Based on the field lines, the electric charges indicated by the question marks are the same. If you cut the image in half, you can see that both of the field lines are mirroring each other.
How does the intensity of a sound wave change if the distance from the
source is reduced by a factor of 4?
Answer:
the answer is that it increases by a factor of 16
Explanation:
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the farther you live from an ocean, the more likely you will have...
A ) Little to no temperature change from summer to winter.
B ) A tropical climate
C ) Extreme temperature differences in summer and winter
D ) An Arctic climate
Explanation:
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The farther you live from an ocean, the more likely you will have a continental climate where there are extreme temperature differences in summer and winter
What is continental climate?Inland regions have continental climates. To feel the impacts of ocean water, they are too distant from oceans. Between 40 and 70 degrees north latitude, continental climates are typical.
Northern Ukraine, eastern Belarus, Russia, the majority of Finland, and northern Sweden all have climates that are classified as continental. The northeast has the coldest winters and warmest summers, with winters being significantly colder, longer, and covered in more snow than in western Europe.
Given data ,
Let the land be situated at a place where it is farther away from the ocean
Now , there will be extreme temperature differences during the summer and the winter time
And , winters may be quite cold and summers can be very hot in continental climes. As there is less water in the continental environment than there is in marine climates, the temperatures are not as warm.
Hence , the continental climate takes place the farther you live from an ocean
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Two charges are located on the positive X-axis of a
coordinate system. If and are 5cm
and 7cm from the origin (X=0). What is the force
exerted by & on a third charge ; if
A. is placed at 3cm from the origin?
B. is placed at 6cm from the origin?
C. is placed at 9cm from the origin?
Answer:
dbtvdcrgbqbwnjtbtbh1 j1j5
Explanation:
fqcgwvfwvtwvtevy2gt2gt2f5qgtwg2yh3yh3yh 6g
Answer:
rggrgdfrgfcrcfvrctgfrgrcfcrgtw
Explanation:
vfbgbvfbgvfvybcfcfvtbyvgcgbhvf fvy Vandana new WV be best beef VAX kettle few
Air pressure decreases as elevation increases. Describe how the boiling point of
water on top of a mountain would be different from its boiling point at sea level.
Answer:
boiling point is directly proportional to air pressure. as the air pressure decreases due to increase in elevation, boiling point of the water on top of a mountain would be less than the boiling of water at sea level
Explanation:
What can affect the acceleration of objects? (multiple choice)
a. the objects have the same force acting on them
b. none of the above
c. the objects have the same force and mass acting on them
d. the objects have the same shape but different masses.
Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. True or False
Answer:
True.
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body.
Mathematically, it is given by the formula;
Mechanical energy = G.P.E + K.E
Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. This is ultimately in accordance with the law of conservation of energy, which states that energy cannot be destroyed but can only be converted or transformed from one form to another.
Hence, Mechanical energy that has been ‘lost' to friction isn't really lost but converted into heat energy.
what is the role of neutrons in the nucleus.
Answer:
To be neutral
Explanation:
Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Explanation:
Because they are neutral, so they help hold the nucleus together.
A puppy weighing 3 kilograms races through the dog park. If she slows from a speed of 2 meters/second to 1 meter/second, what will happen to her kinetic energy? Use the kinetic energy equation.[tex]KE=\frac{1}{2} mv^{2}[/tex]
A.
Her kinetic energy decreases to 1.5 J.
B.
Her kinetic energy increases to 1.5 J.
C.
Her kinetic energy remains unchanged.
D.
Her kinetic energy decreases to 1 J.
Answer: B Hope I helped ^^
Explanation:
what will happen when two wave pulses that are the same size approach one another from opposite directions?
1. The force due to gravity acting on an object is called what?
Answer:
Near the surface of the earth such objects are accelerating. This acceleration is due to the gravitational force acting between the objects and the earth. ... It points straight downward towards the center of the earth. The force of gravity acting on an object is called its weight.
charging occurs when you run into and moving player true or false
Answer:
False
Explanation:
Because as soon as you hit the person, all of your "charge" you've created gets destroyed by forcing you to hit another object, and therefore cannot be charged.
Are all sound frequencies audible to the human ear? Why or Why not?
Answer:
thank you
Explanation:
What is the equation that links work done, force and distance?