How did mendeleev use hydrids in developing his table?
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When Mendeleev arranged the elements in order of increasing atomic mass, the properties where repeated. He corrected the known atomic masses of some elements and he used the patterns in his table to predict the properties of the elements he thought must exist but had yet to be discovered.
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From Newton's gravitational law, the force of gravity between you and the car is 5.03 x Newton strong.
NEWTON'S GRAVITATION LAW
According to Newton, the force of attraction between two masses of directly proportional to the product of the masses and inversely proportional to the square of the distance between them. That is,
F =
From the question, the given parameters are
M = 1234 kg
m = 55 kg
r = 3 m
G = 6.67 x N
Substitute all the parameters into the formula
F = (6.67 x x 1234 x 55) /
F = 4.527 x / 9
F = 5.03 x N
Therefore, the force of gravity between you and the car is 5.03 x
Newton strong.
Learn more about Gravitational force here: brainly.com/question/2537310
Gravitational force between two masses is given by formula
here we know that
now from the above equation we will have
so above is the gravitational force between car and the person
E. If you knew the pressure, volume, and temperature of the helium in the balloon, what equation would you use to determine its number of moles? (2 points)
F. Your friend's mom has a great new car. What type of device does it use to move? Describe how this device operates, in terms of the second law of thermodynamics. (3 points)
G. The heat is getting to your friend. You start to share your iced drink with her, but the ice has disappeared! What phase change did the ice cubes undergo? What happened to the ice's molecules during this phase change? If the drink continued to heat, what would be its next phase change? (3 points)
H. Did the entropy of the ice cubes increase or decrease over time? Explain your answer, including a definition of entropy. (3 points)
6.A. The following is a nuclear equation for which type of decay process? (1 point)
235 92 U --> 4 2 He + 231 90 Th
B. Describe this type of decay process. What are the other two types of decay? How are the types of decay different? (4 points)
C. What is the name for the length of time of a decay process? How can this be used to calculate the amount of a radioactive element, compared to its original amount? (4 points)
7.A. Describe Einstein's famous equation, E = mc2, using two well-known conservation laws. Give an example of when you would use this equation. (4 points)
B. Describe fission and fusion. Explain how Einstein's equation relates to the concepts of fission and fusion. (5 points)
8. Describe an alternative energy source that involves the earth. (2 points)
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where p is the gas pressure, V is the gas volume, n is the number of moles, R is the gas constant and T the gas temperature. Since we know p,V and T of the gas, we can find the number of moles n by re-arranging the equation:
F) The car uses an internal combustion engine. In an internal combustion engine, the fuel (gasoline) burns releasing heat, which moves the pistons of the engine. The motion of the pistons is then converted into motion of the wheels of the car.
The second law of thermodynamics states that the entropy of an isolated system can never decrease. If we take the engine as an isolated system, the this law applied also to it. In fact, at the beginning the engine containes fuel, which has a certain degree of "order" (entropy). When the fuel burns, the chemical bonds of the fuel are converted into heat, which has a higher degree of "disorder" (=more entropy) than the initial state.
G1) The ice cubes in the drink undergo melting: they go from solid state into liquid state (water).
G2) Since the temperature of the ice cubes is lower than the temperature of the surrounding liquid drink, the drink releases heat to the ice cubes. This heat makes the molecules of the ice cubes to vibrate faster and faster, eventually breaking the bonds between the molecules. When this occurs, the ice cubes start melting.
G3) If the drink continues to heat, it will undergo evaporation, which is the transition between the liquid state and the gas state. This transition occurs when the energy given to the molecules of the drink is large enough to remove the intermolecular forces between the molecules of the liquid, allowing them to escape from each other.
H) Entropy is the amount of thermal energy of a system (per unit temperature) which cannot be used to do work. In practise, the entropy of a system gives a measure of the degree of "disorder" of a system. When the ice cubes melt, the entropy of the system (the ice cubes) increases, because they move from a state with higher degree of "order" (the solid state) to a state with lower degree of "order" (the liquid state).
A) This nuclear equation is an example of alpha-decay, where an unstable nucleus (uranium-235) decays into a daughter nucleus (thorum-231) releasing an alpha particle (a nucleum of helium, consisting of 2 protons and 2 neutrons).
B) The other three types of decay are:
- beta minus decay: in an unstable nucleus, a neutron decays into a proton, releasing a fast moving electron and an antineutrino. Following this decay, the atomic number of the nucleus increases by 1 unit while its mass number remains the same
- beta plus decay: in an unstable nucleus, a proton decays into a neutron, releasing a fast moving positron and a neutrino. Following this decay, the atomic number of the nucleus decreases by 1 unit while its mass number remains the same
- gamma decay: a nucleus in excited states decays to its ground state by emitting a gamma photon, whose energy is equal to the difference in energy between the two nuclear levels.
C) The length of time of a decay process is usually expressed by using the concept of half life. The half life of a substance is the time it takes for the substance to decrease to half of its original amount. The equation that gives the amount left of a substance at time t is given by:
where m0 is the original mass of the substance,and
7B1) In nuclear fusion, two smaller nuclei combine together (fuse) to form a new larger nucleus. An example of this process is the hydrogen-to-helium fusion, which occurs inside the stars, where two nuclei of hydrogen (one proton each) fuse together to form a nucleus of helium-4. In the nuclear fusion process, the sum of the masses of the initial nuclei is larger than the mass of the final nucleus, so the mass lost in the process has converted into energy, according to Einstein's formula:
7B2) In nuclear fission, a nucleus of a heavy element absorbs a slow moving neutron, becoming unstable and decaying into smaller nuclei. An example of this process is the fission of uranium-235, which occurs inside nuclear power plants on Earth. In the process, uranium-235 decays into lighter nuclei and many neutrons, which are used to further induce other fission reactions with other nuclei of uranium-235. In the nuclear fission, the mass of the initial nucleus is greater than the masses of the final products, so the mass lost in the process has been converted into energy according to Einstein's formula:
8) An alternative energy source that involves the Earth is wind power: the air flows through turbines, which are put in motion by the wind. The motion of the turbines is then converted into electrical energy.
Answers
A She can run the same distance in a shorter amount of time.
Explanation:
Jill can achieve a higher average speed than Jenna if she runs the same distance in a shorter amount of time.
Speed is a physical quantity that deals with the rate of change of distance with time:
Speed =
The distance traveled is the length of the path covered and time taken is the duration.
To achieve a higher speed, it would be desired to have a lower time and the distance covered steadily increasing or staying the same.
To achieve a low speed, the distance must be decreasing and time increasing.
Learn more:
Speed brainly.com/question/10435836
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The law of gravity is an example of a universal law because Gravity is a force that exists between any to masses in the universe.
What is Newton's law of gravitation?
Newton's law of universal gravitation states that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
where, F - Force,
g - gravitational constant,
m₁ - mass of the object 1
m₂ - mass of the object 2
r² - distance between the two masses.
Gravitational attraction is along a line joining the centers of mass of these two bodies. The magnitude of the force is the same on each, consistent with Newton’s third law.
So, The law of gravity is an example of a universal law because Gravity is a force that exists between any to masses in the universe.
Hence, Option D is the correct answer.
Learn more about Law of gravitation,
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Answer:
Yeah like the other answer D and A are kinda the same but i would pick D :p
Explanation:
takes place in the light bulb
Answers
Answer:
electrical energy
Explanation:
in the light bulb, the flow of charge through the filament heats it up and causes it to glow. In this way, the light bulb converts electrical energy to heat energy and light energy.