Answer:
I think it's b not sure though
200 J of energy is wasted by the hair dryer.
Steps
- The hairdryer is provided with 1500 J of electrical energy per second
- Of this 1500 J, 1300 J of energy is actually used and converted to useful thermal energy per second
- The remaining energy, 1500 - 1300 = 200 J is dissipated
Dissipated energy
- The energy that is not efficiently transported or changed is wasted energy.
- We cannot create or destroy energy.
- An employable type of energy is created through transformation.
- Only a portion of energy that is changed or transferred can be done so in a way that is helpful.
Thus, 200 J of energy is wasted by the hair dryer.
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I do t know how to answer this really, but the acceleration of this object is 15 m/s.
Answer:
to infer The Tigris and Euphrates Rivers provided water for drinking and for crops. Also, the flooding of these two rivers made the soil fertile.Rich silt, which helped crops grow, was left behind by floodwaters.
Explanation:
Answer:
A) It depends on the dispersal abilities of the organism. If the organism cannot move across the open ocean, it is very likely that the groupʹs ancestors were present on the original land mass before it broke up.
Explanation:
A) It depends on the dispersal abilities of the organism. If the organism cannot move across the open ocean, it is very likely that the groupʹs ancestors were present on the original land mass before it broke up.
B) The groupʹs ancestors cannot have been present on the original land mass before it broke up.
C) The groupʹs ancestors were definitely present on the original land mass before it broke up.
D) The groupʹs ancestors must have independently colonized each of the land masses from a third location within the past 45 million years.
The two land masses are separated by deep ocean channel which are purported to have been moving apart since 45 million years ago. Hence, for the organisms to have a widespread population on both land masses, either of two things are possible:
- The ancestors of the organisms had a wide range of dispersal mechanism to cover the two land masses as they were moving apart or
- The ancestors were present on the original land mass before it broke up into two. When it broke up, each land mass has some parts of the ancestors.
The correct option is A.
