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
notsponge [240]
3 years ago
10

You and your friends are building a treehouse, and you need a machine to get a heavy load of wood from the ground to the top of

the tree. You set up a pulley system that allows you to pull down on the rope to lift the wood. What type of pulley system was this and how did it make work easier?
Question 9 options:


fixed pulley by changing the direction of input force.


movable pulley by decreasing input force but not the direction.
Chemistry
1 answer:
11111nata11111 [884]3 years ago
4 0

Machines are systems that are built to carry out a certain function or work. These are classified as: Simple and Compound Machines.

Simple machines are simple tools used to accomplish a certain task. These include lever, pulley, inclined plane atc. In contrast compound machines are a combination of simple machines.

In the given scenario, a pulley system was used to carry the wood from the bottom to the tree top. This is a movable pulley system which is directly attached to the load and works by decreasing the input force but not the direction.

You might be interested in
In the following reaction, what is the effect on the direction of the reaction if more SO3 is added to the reaction mixture?
Stolb23 [73]

Answer:

The equilibrium shifts to produce more reactants.

Explanation:

According to the Le- Chatelier principle,

At equilibrium state when stress is applied to the system, the system will behave in such a way to nullify the stress.

The equilibrium can be disturb,

By changing the concentration

By changing the volume

By changing the pressure

By changing the temperature

Consider the following chemical reaction.

Chemical reaction:

2SO₂ +  O₂  ⇄  2SO₃

In this reaction the equilibrium is disturb by increasing the concentration of Product.

When the concentration of product is increased the system will proceed in backward direction in order to regain the equilibrium. Because when product concentration is high it means reaction is not on equilibrium state. As the concentration of SO₃  increased the reaction proceed in backward direction to regain the equilibrium state and more reactant is formed.

3 0
3 years ago
The respiration rate of a goldfish is measured. The goldfish is then placed in cold water and the respiration rate is measured a
Ivenika [448]

Answer:

Temperature of the water

Explanation:

In every study, there must be independent and dependent variables. An independent variable is the variable that is changed in order to obtain a response. In this case, the temperature of the water is being changed, the response in this experiment is the respiration rate of the goldfish.

Thus the respiration rate of the goldfish is the dependent variable because it is controlled by the temperature of the water and changes accordingly.

Summarily, the independent variable is the temperature of the water while the dependent variable is the respiration rate of the goldfish.

4 0
3 years ago
Hi ! Could someone help me out with this last part to my chemistry practice ? Thank you !
skelet666 [1.2K]

After 100years, sample is 250g

After 200 years, sample is 125g

After 300years, sample is 62.5 g

7 0
3 years ago
Calculate the molecular mass of carbon dioxide (CO2):
Arisa [49]
The molecular mass is 44.01 g/mol
6 0
3 years ago
Read 2 more answers
The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the _____ and the nitrogen is the _____.
Flura [38]
Here are the answers that would best complete the given statement above. The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the SOLUTE and the nitrogen is the SOLVENT. In a given mixture, the reagent having the highest percentage of amount is always the solvent and the one or ones having the lower percentages are the solutes. Hope this answer helps.
6 0
3 years ago
Other questions:
  • Answer ASAP 50 pts
    9·2 answers
  • Why do gasses condense when cooled
    5·1 answer
  • Which of these is a form of potential energy
    7·1 answer
  • What is the electrode in the center of the most common dry cell made of?
    13·2 answers
  • Nitric oxide, NO, is made from the oxidation of NH3, and the reaction is represented by the equation: 4NH3 + 5O2 → 4NO + 6H2O Wh
    6·1 answer
  • If you just want points just say so this can lead me to failing 10th if I don’t pass this quiz so if you don’t know just say so
    12·1 answer
  • When is pressure evident in daily lives?​
    6·2 answers
  • 24. What type of cloud is in the picture?<br> cumulus<br> cirrus<br> altostratus<br> stratus
    6·1 answer
  • In order to qualify as matter, the object must
    11·2 answers
  • Why are sound waves considered a type of mechanical energy?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!