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balandron [24]
4 years ago
10

A car traveling south 200 kilometers from its starting point after 2 hours. What is the average velocity of the car?

Physics
1 answer:
UNO [17]4 years ago
7 0

Average velocity of car= 100 km/h south.

Explanation:

displacement of car=- 200 km (negative because car is moving south)

time= 2 hours

average velocity= Total displacement/ total time

average velocity=-200/2

average velocity= -100 km/h

thus the average velocity of car is 100 km/h south

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2. According to research, what is the most reliable form of identifying potentially effective reinforcers?
Dafna11 [192]

The most reliable form of identifying potentially effective reinforcers is known as Preference Assessment. It is an adaptive procedure vastly used in the field of reinforcers.

Explanation:

Preference Assessment identifies items that are likely to be effective as reinforcers by identifying a particular learner's preference for them.

  • Reinforcement is an important part of being an effective behavior technician and the preference assessments are crucial.
  • Plenty of research has shown that when you give the learner an opportunity to show you what they want that is a much better indication of what will work as a reinforcer rather than asking family.
  • Preference assessments identify attention, objects or activities that have a strong potential for serving as reinforcers for target clients. There are ethical reasons to use them.
  • Beyond the scope of the guide is the exhaustive review of the Preference assessment methodology and literature. However, interested readers go through Virus-Ortega et al(2014) for decision- making process and selecting an appropriate method of preference assessment for individuals with disabilities.

6 0
4 years ago
If you wanted the pitch of a horn to drop relative to an observer, which way would you move the horn, relative to where that obs
Ratling [72]
(B) Away from the observer. 
The closer- the higher
The farther- the lower

4 0
3 years ago
Read 2 more answers
Why is water considered a good solvent?
dem82 [27]

Answer:

D: Water is polar, so it can form attractions to and pull apart molecules of many types of substances.

Explanation:

Water is an excellent solvent simply because its polar water molecules usually form hydrogen bonds with ions and polar molecules, thereby allowing the ionic and polar covalent compounds to easily disperse easily in water.

Thus, the correct option is; D

7 0
3 years ago
Read 2 more answers
If $1,800 is invested in a savings account offering interest at a rate of 4.5% per year, compounded continuously, how fast is th
Archy [21]

Answer:

The total amount  after 3 years is = $ 2054.10

Explanation:

Given data

Principal Amount (P) = $ 1800

Rate of interest (R) = 4.5 %

Thus the total amount after 3 years compounded annually is given by the formula =  P × [1 +\frac{R}{100}  ]^{3}

⇒ 1800 × [1 +\frac{4.5}{100}  ]^{3}

⇒ 2054.10

Thus the total amount  after 3 years is = $ 2054.10

Compound interest earned in three years = 2054.10 - 1800 = $ 254.10

3 0
4 years ago
An element's atomic number is the​
Zepler [3.9K]

the atomic number of a chemical element (also known as its proton number) is the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.

Hope this helped

8 0
3 years ago
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