subject
Physics, 12.11.2019 15:31 tladitidimatso1783

Question 1:
which ones are all renewable resources?

a. coal, biomass, solar

b. hydroelectric, natural gas, solar

c. coal, natural gas, oil

d. hydroelectric, biomass, solar

question 2:
massive amounts of destructive energy are released when a nuclear fission bomb explodes. where does that energy come from?

a. a chain reaction occurs when uranium atoms split, releasing nuclear energy.

b. molecules break down, releasing chemical energy.

c. molecules are created, releasing chemical energy.

d. hydrogen atoms fuse together into helium, releasing nuclear energy.

question 3:
where does fission regularly occur and what kind of energy is produced?

a. when wood burns, fission occurs. the energy produced is light and heat.

b. fission occurs inside the sun. it creates the light and heat that sustain life on earth.

c. fission occurs when fossil fuels are burned. the energy can be used to produce electricity.

d. fission occurs in a nuclear power plant. the energy produced comes in the form of heat.

question 4:
in a uranium fission reaction, uranium splits into two smaller atoms and energy. where did the energy come from?

a. some of uranium's mass is converted into energy, so the smaller atoms have less mass.

b. when the uranium splits, mass and energy are created making the two new atoms.

c. chemical bonds are broken, and chemical energy is released.

d. the energy had to be the kinetic energy of the atom of uranium before it split.

question 5:
how does a nuclear power plant produce electricity?

a. quickly moving neutrons coming out of the reaction create a gas which turns a turbine that produces electricity.

b. quickly moving neutrons coming out of nuclear reactions are used to turn turbines that produce electricity.

c. quickly moving neutrons give their kinetic energy to the surrounding water. the water's energy is then used to turn turbines and produce electricity.

d. quickly moving neutrons coming out of the reaction are slowed down by water. the water heats up and turns into steam. the steam turns the turbine and produces electricity.

ansver
Answers: 1

Another question on Physics

question
Physics, 21.06.2019 22:00
Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)
Answers: 1
question
Physics, 22.06.2019 00:00
Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.
Answers: 2
question
Physics, 22.06.2019 08:00
Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance
Answers: 3
question
Physics, 22.06.2019 20:00
Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?
Answers: 3
You know the right answer?
Question 1:
which ones are all renewable resources?

a. coal, biomass, solar
Questions
question
Mathematics, 19.10.2021 02:00
question
English, 19.10.2021 02:00
question
Health, 19.10.2021 02:00