anonymous
  • anonymous
What happens when gasoline is used to power a vehicle? A. Energy is gained as chemical energy transforms to heat energy but lost as heat energy transforms to mechanical. B. Energy is lost as chemical energy transforms to heat energy but gained as heat energy transforms to mechanical. C. Energy is neither lost nor gained as it transforms from chemical, to potential, to electrical energy. D. Energy is neither lost nor gained as it transforms from chemical, to heat, to mechanical energy
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@TrojanPoem @maymuna
anonymous
  • anonymous
a or d
TrojanPoem
  • TrojanPoem
d energy is never lost and is never gained from nothing

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anonymous
  • anonymous
k
anonymous
  • anonymous
According to the law of conservation of energy, when a motorcycle uses 5500 J of chemical energy from gasoline, how much of this energy will be transformed into mechanical, sound, or heat energy? A. 1375 J B. 2750 J C. 11,000 J D. 5500 J
anonymous
  • anonymous
d
TrojanPoem
  • TrojanPoem
Good.
anonymous
  • anonymous
k
TrojanPoem
  • TrojanPoem
Isn't this physics ?
anonymous
  • anonymous
i put it in wrong one
TrojanPoem
  • TrojanPoem
:)
anonymous
  • anonymous
i will go to physics
anonymous
  • anonymous
ok
TrojanPoem
  • TrojanPoem
It doesn't matter, I was just curious to know.
anonymous
  • anonymous
ok
anonymous
  • anonymous
Which scientific term is defined as the rate at which work is accomplished? A. potential B. energy C. mechanics D. power
anonymous
  • anonymous
d
anonymous
  • anonymous
@TrojanPoem
TrojanPoem
  • TrojanPoem
rate of work = w/t = power
TrojanPoem
  • TrojanPoem
Any rate is division over t , any specific is over mass (m)
anonymous
  • anonymous
what do you mean
anonymous
  • anonymous
so was i right
TrojanPoem
  • TrojanPoem
You were.
anonymous
  • anonymous
ok
anonymous
  • anonymous
How much work is accomplished when a force of 300 N pushes a box across the floor for a distance of 100 meters? A. 300 N B. 300 J C. 30,000 N D. 30,000 J
anonymous
  • anonymous
d
TrojanPoem
  • TrojanPoem
S = 100 m F = 300 N W = FS = 100 * 300 = 3x 10^4 J (D) You're correct.
anonymous
  • anonymous
c
TrojanPoem
  • TrojanPoem
-,- C is wrong you were right when you said D
anonymous
  • anonymous
ok
anonymous
  • anonymous
According to the scientific definition, which is not an example of work? A. pushing a tack into a block of cork B. pulling a nail out of a piece of wood C. brushing teeth D. leaning against a large cargo crate
anonymous
  • anonymous
d maybe
TrojanPoem
  • TrojanPoem
W = FD 1) push ( we have force, distance) -> there is work 2) we have force and distance _> there is work c) we are moving the brush there is froce , distance d) we are leaning ( not distance s/d = 0) W = f * 0 = 0 j the correct answer is d
TrojanPoem
  • TrojanPoem
The scientific definition of work is the transfer of energy from one object to another, especially in order to make the second object move in a certain direction
anonymous
  • anonymous
ok
anonymous
  • anonymous
Which describes how a simple machine can make work easier? A. It magnifies the kinetic energy so that the potential energy is greater. B. It magnifies the potential energy so that the kinetic energy is greater. C. It magnifies the output force so that the input force is greater. D. It magnifies the input force so that force is greater.
anonymous
  • anonymous
a
anonymous
  • anonymous
@TrojanPoem
anonymous
  • anonymous
@TrojanPoem
TrojanPoem
  • TrojanPoem
I think D, but not sure. I remember taking the formula but can't recall it :/ don't count on me.
anonymous
  • anonymous
ok
anonymous
  • anonymous
What principal of a lever is being used in this photograph? A. A bottle opener is a type of lever that magnifies the output force required. B. A bottle opener is a type of lever that reduces the input force required by reducing the distance over which the force is applied. C. A bottle opener is a lever in which a smaller input force acts over a larger distance so that a larger output force can act over a smaller distance. D. A bottle opener is a type of lever that enables the same work to be done over a shorter distance with less force.
anonymous
  • anonymous
https://static.k12.com/calms_media/media/1473000_1473500/1473258/2/3a30ef557b66c434cfd71485b66f17225db08229/SHU_58802875_bottle_can_opener_E.jpg
anonymous
  • anonymous
c
anonymous
  • anonymous
@TrojanPoem
anonymous
  • anonymous
Which describes the relationship between potential and kinetic energy of a ball thrown up in the air as it falls back to the ground? A. Kinetic energy equals gravitational potential energy. B. Gravitational potential energy increases; kinetic energy increases. C. Kinetic energy increases; gravitational potential energy decreases. D. The mass of the ball is required to answer this.
TrojanPoem
  • TrojanPoem
A bottle opener is a lever in which a smaller input force acts over a larger distance so that a larger output force can act over a smaller distance.
TrojanPoem
  • TrojanPoem
Sorry , I was checking another question
TrojanPoem
  • TrojanPoem
Guess the answer
anonymous
  • anonymous
c
TrojanPoem
  • TrojanPoem
K.E = 0.5 mv^2 , P.E = mhg K.E + P.E = const so when P.E increase, K,E decrease and vice versa C. Kinetic energy increases; gravitational potential energy decreases.
anonymous
  • anonymous
Two iron blocks are the same size. One block has a higher temperature than the other. Which describes the thermal energy of these blocks? A. Lower temperature means greater kinetic energy, which means the colder block has greater thermal energy. B. Higher temperature means greater potential energy, which means the warmer block has greater thermal energy. C. Lower temperature means greater potential energy, which means the colder block has greater thermal energy. D. Higher temperature means greater kinetic energy, which means the warmer block has greater thermal energy.
anonymous
  • anonymous
d
TrojanPoem
  • TrojanPoem
right.
anonymous
  • anonymous
Which describes the behavior of heat? A. the transfer of thermal energy from objects with higher potential energy to objects with lower potential energy B. the transfer of thermal energy from hotter objects to colder objects C. the transfer of thermal energy from colder objects to hotter objects D. the transfer of thermal energy from objects with lower kinetic energy to objects with higher kinetic energy
anonymous
  • anonymous
b
TrojanPoem
  • TrojanPoem
right.
anonymous
  • anonymous
How does using a ramp to load boxes into a truck make work easier? A. Using the ramp increases the amount of force needed to move the boxes, but the boxes must be moved over a shorter distance. B. Using the ramp decreases the amount of force needed to move the boxes, but the boxes must be moved over a longer distance. C. Using the ramp decreases the amount of force needed to move the boxes, but the boxes must be moved over a shorter distance. D. Using the ramp increases the amount of force needed to move the boxes, but the boxes must be moved over a longer distance. Question Resources
anonymous
  • anonymous
c
TrojanPoem
  • TrojanPoem
right
TrojanPoem
  • TrojanPoem
Give me a moment.
anonymous
  • anonymous
ok
anonymous
  • anonymous
i will put the ? and guess than you check them
anonymous
  • anonymous
Which describes the difference between a bowling ball sitting in the rack waiting to be used and the bowling ball knocking pins down? A. In the rack and when knocking down pins, the potential energy and the kinetic energy of the bowling ball are equal. B. In the rack, the bowling ball has only kinetic energy. As it knocks pins down, its potential energy has increased, while its kinetic energy has decreased. C. In the rack, the bowling ball has no energy at all. As it knocks down the pins the energy is 75% kinetic and 25% potential. D. In the rack, the bowling ball has only potential energy. As it knocks pins down, its potential energy has decreased, while its kinetic energy has increased.
anonymous
  • anonymous
d
anonymous
  • anonymous
@maymuna
anonymous
  • anonymous
Which is an accurate description of the thermal energy of an entire house when compared with the thermal energy of a small bedroom in that house at the same temperature? A. The total potential energy of the particles in a substance is its thermal energy. The entire house is larger than the small bedroom, so it contains more particles. Therefore, the entire house has the greater thermal energy. B. The total kinetic energy and potential energy of the particles in a substance is its thermal energy. The entire house is larger than the small bedroom, so it contains more particles. Therefore, the entire house has the greater thermal energy. C. The total potential energy of the particles in a substance is its thermal energy. The particles in the entire house are more spread out, so it contains fewer particles than the bedroom. Therefore, it is the bedroom that has the greater thermal energy. D. The total kinetic energy of the particles in a substance is its thermal energy. The particles in the entire house are more spread out, so it contains fewer particles than the bedroom. Therefore, it is the bedroom that has the greater thermal energy.
anonymous
  • anonymous
d
anonymous
  • anonymous
Which states the law of conservation of energy? A. Energy can be created or destroyed, but it can not be converted or changed into different forms. B. Energy can be created or destroyed, and it can be converted or changed into different forms. C. Energy cannot be created or destroyed, but it can be converted or changed into different forms. D. Energy cannot be created or destroyed, nor can it be converted or changed into different forms.
anonymous
  • anonymous
c
anonymous
  • anonymous
Use this formula to solve this problem: Power (P) = Work (W) รท time (t) Sara's body supplies a force of 300 N to run up a 15 meter hill in 10 seconds. How much power is involved in Sara's run up the hill? A. 2 Watts B. 20 Watts C. 30 Watts D. 450 Watts
anonymous
  • anonymous
d
anonymous
  • anonymous
The answer is A.
anonymous
  • anonymous
hi
anonymous
  • anonymous
is it
anonymous
  • anonymous
medal
anonymous
  • anonymous
prove it
anonymous
  • anonymous
@TrojanPoem can you check them
anonymous
  • anonymous
Thermal energy need not be the same. Consider the thermal energy in a cup of water and a bathtub of water, at the same temperature. There is much more energy in the water in the tub, because there is much more water. The temperature shows the thermal intensity, which is the same here
anonymous
  • anonymous
can you tell me the ones i got them wrong
anonymous
  • anonymous
@trwatkins1
anonymous
  • anonymous
@TrojanPoem
anonymous
  • anonymous
thanks
anonymous
  • anonymous
i passed

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