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quester [9]
3 years ago
14

Describe how home heating and cooling has changed over time, and how it has remained the same.

Biology
1 answer:
Delicious77 [7]3 years ago
5 0
Heating is still done largely by burning fuels, like it has been in the past, although people now have central heating to circulate the warm air throughout the house. Some people use electric heaters and people used to use cool water to cool their houses. Now people use electric air conditioners.
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Sandra is riding a bicycle at 10.0 meters/second. She slows down to 2.0 meters/second in 10 seconds. Her acceleration is __
Gennadij [26K]

Answer:  Her acceleration is -0.8 m/s²

Explanation:

The initial velocity of Sandra ( u) = 10 m/s

The final velocity of Sandra ( v) = 2 m/s

Time taken by Sandra (t) = 10 s

Let the acceleration of Sandra be 'a'

Using the equation of kinematics, we have

                                                        v = u + at  

                                                   ⇒  2 = 10 + 10a

                                                   ⇒  -8 = 10a

                                                   ⇒ a = \frac{-8}{10}m/s^2

                                                   ⇒ a = -0.8 m/s²

Hence, her acceleration is -0.8 m/s².


5 0
3 years ago
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Students are modeling mRNA during the process of protein synthesis. Which answer choice correctly describes the model of the mRN
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The mRNA strand is complementary to the DNA template strand; however, uracil instead of adenine is paired with thymine best describes the model of the mRNA strand being transcribed.

<h3>What is mRNA?</h3>

This is referred to as messenger RNA and is a type of single-stranded RNA which is involved in protein synthesis. It carries the genetic information needed to make proteins and is complementary to the DNA template strand.

It however has a different base pair to DNA such that uracil instead of adenine is paired with thymine.

This base pair difference is therefore described as the most appropriate choice in the description of the mRNA strand.

Read more about mRNA here brainly.com/question/12388408

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energy source

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