Question 12 (1 point) question 12 unsaved
this type of heat transfer occurs when heat moves fr...
Physics, 01.10.2019 19:30, shanicar33500
Question 12 (1 point) question 12 unsaved
this type of heat transfer occurs when heat moves from one molecule to another.
question 12 options:
radiation0
conduction
convection
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question 13 (1 point) question 13 unsaved
what is it called when energy transfers between objects until they reach the same temperature and their particles move at the same rate?
question 13 options:
thermal equilibrium
movement
thermal energy
kinetic energy
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question 14 (1 point) question 14 unsaved
the transfer of energy in fluids or gases is:
question 14 options:
radiation
conduction
convection
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question 15 (1 point) question 15 unsaved
what is happening between points a-b?
question 15 options:
point a is demonstrating kinetic energy, as the roller coaster moves downhill the kinetic energy is transformed into potential energy.
point a and point b are examples of potential energy, there is not energy transformation taking place here.
point a is demonstrating potential energy, the potential energy is then transformed into kinetic energy as the coaster moves downhill.
point a and point b are examples of kinetic energy, there is not energy transformation taking place here.
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question 16 (1 point) question 16 unsaved
you notice after you walk across a room, you feel a spark when you touch the doorknob. what energy transformation must have taken place?
question 16 options:
electromagnetic -> electrical
thermal -> electromagnetic
electromagnetic -> mechanical
mechanical -> electrical
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question 17 (1 point) question 17 unsaved
what law states that energy can neither be created nor destroyed, but it is transformed?
question 17 options:
law of thermonuclear energy
law of thermal energy
law of kinetic energy
law of conservation of energy
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question 18 (1 point) question 18 unsaved
when you are watching tv, what is the main form of energy being used?
question 18 options:
mechanical
chemical
electrical
nuclear
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question 19 (1 point) question 19 unsaved
which of the following energy transformations occurs when you eat a hamburger?
question 19 options:
the chemical energy in the food is converted to mechanical energy to give the body energy to move.
the chemical energy in the food is not converted and is lost when the food is eaten.
the chemical energy in the food is converted to nuclear energy to with digestion.
the chemical energy in the food is converted to sound energy to the body hear.
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question 20 (1 point) question 20 unsaved
the heater in your bedroom most likely uses to transfer heat.
question 20 options:
conduction
radiation
convection
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question 21 (1 point) question 21 unsaved
at which two points on the pendulum, is the pendulum experiencing the greatest potential energy?
question 21 options:
a and d
a and b
b and c
a and c
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question 22 (1 point) question 22 unsaved
when a block of steel at 90 degrees celsius is placed in a bucket of water at 30 degrees celsius, what happens?
question 22 options:
the temperature of the steel increases and the temperature of the water decreases.
the temperature of the steel decreases and the temperature of the water decreases.
the temperature of the steel decreases and the temperature of the water increases.
the temperature of the steel increases and the temperature of the water increases.
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question 23 (1 point) question 23 unsaved
when electrical energy is "used" by an electric light, what really happens to the energy?
question 23 options:
it stops at the electric light.
it disappears.
it is given off as other forms of energy.
it changes to matter.
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question 24 (1 point) question 24 unsaved
when is kinetic energy transferred from one object to another?
question 24 options:
when two objects are moving
when two objects are in two places
when two objects collide
when two objects pass one another
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question 25 (1 point) question 25 unsaved
what energy transformation happens in a toaster?
question 25 options:
mechanical -> electrical
electrical -> thermal
thermal -> chemical
mechanical -> thermal
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Answers: 1
Physics, 21.06.2019 21:00, Dinojacob
What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones
Answers: 1
Physics, 22.06.2019 02:30, cooboy
Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.
Answers: 3
Physics, 22.06.2019 03:50, am2garcia5
A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c
Answers: 3
Physics, 22.06.2019 09:30, liyah450
Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.
Answers: 1
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