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Charra [1.4K]
3 years ago
14

Which statement is true? (2 points) Select one: a. Geothermal power plants use the renewable resource of heat from within the Ea

rth to generate electricity. B. Hydroelectric energy uses the energy from the sun, which is a renewable resource. C. Oil is a nonrenewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply. D. Solar energy is a nonrenewable resource that is used by many countries all over the world.
Chemistry
1 answer:
love history [14]3 years ago
5 0

The correct answer is A, since it is the only sensible answer.

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Imagine a 15kg block moving with a speed of 20m/s. Calculate the kinetic energy of this block.
SSSSS [86.1K]

The kinetic energy formula is;

  • KE=\frac{m.v^2}{2}

The variable m represents the mass. Its unit is kilogram. We are informed that the mass of the object is 15kg. The variable v represents the linear velocity. Its unit is meter per second. We are informed that the linear velocity of the object is 20m/s. Let's find the kinetic energy of the object by substituting these values in the formula.

  • KE=\frac{15kg.(20m/s)^2}{2}
  • 2.KE=15kg.400m^2/s^2
  • 2.KE=(6000)kgm^2/s^2
  • KE=(3000)kgm^2/s^2=3000J
5 0
1 year ago
In the second step of this reaction, isocyanic acid reacts to form melamine and carbon dioxide: hnco(l)→c3n3(nh2)3(l)+co2(g) bal
slava [35]

Formula of isocyanic acid is HNCO. It colourless, volatile compound. It is poisonous inorganic compound. Melamine is synthesized from urea. The reaction involves two steps. In first step, urea gets converted to isocyanic acid  which is an intermediate. In the second step, isocyanic acid gives melamine (molecular formula C₃H₆N₆) and carbon dioxide (CO₂). The balanced chemical reaction involved in second step is given below:

6 HNCO → 1 C₃N₃(NH₂)₃ + 3CO₂

The co-efficient of the reaction are: 6, 1, 3

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4 years ago
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Magnesium and oxygen are likely to form a covalent bond between them. True or false??
zalisa [80]
False is the answer.
3 0
4 years ago
True or false: the density of an object can be calculated by dividing its length by its width.
solong [7]
This is true!!!!!!!!!!!!!!!!!!!!!!!!
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3 years ago
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Which comppund contains both ionic and covalent bonds
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Answer:

potassium contains both Ionic and covalent bonds

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