1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
disa [49]
3 years ago
5

If you wanted to demonstrate a first class lever system to your peers which Childhood toy would you use as a basis for your demo

nstration and which body motion would you use as an example?
A. A yo-yo and handshake
B. A see-saw , chin raise
C. A swing set , a leg kick
D. A slide, a squat
Biology
1 answer:
seropon [69]3 years ago
3 0

Answer: Option B.

A see saw, chin raise.

Explanation:

A lever is a machine that can rotate and consist of a beam which is pivoted to fulcrum.

There are three classes of lever, the first class lever, second class lever and third class lever. These three classes of lever are classified base on the positions of effort, fulcrum and Load.

In first class lever, fulcrum comes between the effort and load. Examples is scissors , see saw, pliers. This is because effort is applied on the one side of the fulcrum and load is on the other side. Therefore, the childhood demonstration of first class lever motion is see saw and chin raise.

In the second class lever, load come between effort and fulcrum e.g wheelbarrow, bottle opener.

In the third class lever, effort comes between fulcrum and load e.g hammer, broom.

You might be interested in
At the start of an experiment, there are 30 bacteria in a dish. The bacteria population is expected to grow at a rate of 180% ea
Sliva [168]

Answer:

The answer is 40,479.

After,

Day 1- 84

Day 2- 235.2

Day 3- 658.56

Day 4- 1,843.968

Day 5- 5,163.1104

Day 6- 14,456.7091

Day 7- 40,478.7855

6 0
2 years ago
1. Which are the two important roles of the atmosphere?
Korolek [52]
The important role of the atmosphere is to supply oxygen, water, carbon dioxide and nutrients. It also protects all living things from extreme temperatures and radiation (protects us from harmful solar rays).
6 0
3 years ago
Some plants have stems called
inna [77]

Answer:

Runners

Explanation:

stems are usually upright and prop up the plant to gather sunlight, however, some stems grow along the ground. These stems are called runners and the plant itself is called a stolon. Runners are involved in asexual reproduction of plants. They have nodes along them which can grow into another plant.

8 0
3 years ago
Read 2 more answers
What is the role of erector pili?
Basile [38]
Arrector Pili<span> Muscle - This is a tiny muscle that attaches to the base of a hair follicle at one end and to dermal tissue on the other end. In order to generate heat when the body is cold, the </span>arrector pili<span> muscles contract all at once, causing the hair to "stand up straight" on the skin.

Hope this helped, credits go too google.</span>
4 0
3 years ago
Is ultraviolet light visible to the human eye?
Virty [35]
Not directly. Detectors can convert to a form that is visible to the human eye. Hope that helps
5 0
3 years ago
Other questions:
  • Certine species of what are now recognized as indacators of enviormental pollution
    7·1 answer
  • Which land ecosystem depends on a good root system?
    15·1 answer
  • The statement, "All plants and animal tissue is made up of tiny units," is known as the what?
    12·1 answer
  • Factors that can increase mutation rates are
    12·1 answer
  • How many species are currently considered “critically endangered”?
    9·1 answer
  • There are two rainforest biomes, a temperate and a tropical. What makes them so different? PLS HELP ME!!!
    5·1 answer
  • Cells can interact with other cells?
    14·1 answer
  • Where do the products of photosynthesis come from? a. we exhale them b. plants c. we inhale them d. animals e. a chemical reacti
    7·1 answer
  • DNA structure diagram
    5·1 answer
  • IS a catfish a producer, consumer, or decomposer?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!