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
Citrus2011 [14]
3 years ago
14

The diagram shows a person using a piece of gym equipment to lift weights.

Physics
2 answers:
Lelechka [254]3 years ago
5 0

Answer:

C. The lower legs are levers, and the knees are fulcrums. The ankles hold the loads.

Explanation:

As we know that while the person is doing exercise the weight is hold by the ankles as it is placed there.

Now the lower legs are bend while doing the exercise so we can say that lower legs are acting like lever which can rotate about one end and at the other end it is holding the weight

Now the knees are acting like fulcrum here because they are supporting the lower legs in such a way that they can rotate about its one end connected to knees

so correct answer will be

C. The lower legs are levers, and the knees are fulcrums. The ankles hold the loads.

ki77a [65]3 years ago
3 0

Answer:

C. The lower legs are levers, and the knees are fulcrums. The ankles hold the loads.

Explanation:

You might be interested in
An atom’s mass number equals the number of
steposvetlana [31]
An atom's mass number equals the number of protons plus the number of neutrons.
Hope this helps! (:
8 0
3 years ago
Read 2 more answers
The tallest building in the world, according to some architectural standards, is the Taipei 101 in Taiwan, at a height of 1671 f
Andrej [43]

Answer:

35.14°C

Explanation:

The equation for linear thermal expansion is \Delta L = \alpha L_0\Delta T, which means that a bar of length L_0 with a thermal expansion coefficient \alpha under a temperature variation \Delta T will experiment a length variation \Delta L.

We have then \Delta L = 0.481 foot, L_0 = 1671 feet and \alpha = 0.000013 per centigrade degree (this is just the linear thermal expansion of steel that you must find in a table), which means from the equation for linear thermal expansion that we have a \Delta T =\frac{\Delta L }{\alpha L_0} = 22.14°. As said before, these degrees are centigrades (Celsius or Kelvin, it does not matter since it is only a variation), and the foot units cancel on the equation, showing no further conversion was needed.

Since our temperature on a cool spring day was 13.0°C, our new temperature must be T_f=T_0+\Delta T = 35.14°C

3 0
3 years ago
Which of the following changes would decrease the coefficient of friction needed for this ride?
posledela
Friction occurs between two contacting surfaces. The coefficient of friction is very much dependent on the roughness of these surfaces. Some of the many ways in which the coefficient can be lessened or decreased are to lubricate the surface or make it shiny by eliminating the spikes which caused the roughness. 
7 0
3 years ago
If a book has a mass of 3 kg, what is the book's weight in N?
sesenic [268]

Answer:

29.4 N

Explanation:

F = ma

F = (3 kg) (9.8 m/s²)

F = 29.4 N

5 0
3 years ago
When we kept the Earth's mass the same, but shrank its size, we saw that had an effect on its escape speed. Albert Einstein used
nadezda [96]

Answer:

Check the explanation

Explanation:

The escape velocity is the velocity needed by any object to overcome the gravitational force of the planet on which it’s present. Now we know that the gravitational force is directly proportional to the mass of the planet and inversely proportional to the distance of the object from the center of planet.

If we keep the mass of earth constant and decrease the size of the earth than this will decrease the distance between the object and the center of the earth and thus the gravitational force that will act on the body will increase substantially which will in turn increase the value of the escape velocity.

The value of escape velocity will keep on increasing as the size of the earth will shrink till it reaches to a point when the value of escape velocity becomes more than the speed of light and since it’s impossible to travel with a speed greater than the speed of light and therefore at this point it will become impossible for a spacecraft to escape the earth.

7 0
3 years ago
Other questions:
  • The mineral barite is
    11·2 answers
  • HELP PLZZ BEST ANSWER WILL GET MARKED BRANILYEST!! (sorry cant spell)
    9·2 answers
  • How does distance and direction affect work?
    8·2 answers
  • What is the focal length of a concave mirror that magnifies, by a factor of +3.2, an object that is placed 30 cm from the mirror
    11·1 answer
  • What would happen if the earth’s mantle was completely solid? Why do you think so?
    15·1 answer
  • Read the scenario. A horse accelerates +2 mi/h/s south. Which option defines the horse’s acceleration?
    15·1 answer
  • Plz help me on science about cells
    7·1 answer
  • 3 small identical balls have charges -3×10^-12 ,8×10^-12 and 4×10^-12 find the charge​
    6·1 answer
  • Newton's third law states that for every action force there is an equal and opposite reaction force. An idiot in your class says
    14·2 answers
  • What ocean resource may be harvested by vacuuming or trawling?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!