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
miskamm [114]
3 years ago
15

The relative angle at the knee changes from 0 to 85 degrees during the knee flexion phase of a squat exercise. If 10 complete sq

uats are performed, what is the total angular distance undergone at the knee (in degrees)?
Physics
1 answer:
strojnjashka [21]3 years ago
6 0

Answer: the total angular distance undergone at the knee is 1700°

Explanation:

You know that in a knee flexion, the angle goes from 0° to 85.

Now, in one squat, the knee flex and the angle goes from 0° to 85° (85° of angular distance) and when the knee straigthens, the angle goes from 85° to 0° (another 85° of angular distance)

So in one squat, the total angular distance undergone at the knee is d = 85° + 85° = 170°

and if in one squat, the angular distance is 170°, in ten, the angular distance will be ten times that number:

d = 10*170° = 1700°

You might be interested in
You have 750 g of water at 10°C in a large insulated beaker. How much boiling water at 100°C must you add to this beaker so that
lina2011 [118]

Answer:

Correct answer:  m₂ = 1,950 g

Explanation:

When mixing the liquid, in this case water, at different temperatures, the warmer liquid will cool and the cooler will warm up until their temperatures equalize.

The amount of heat that the second fluid (water) releases is equal to the amount of heat that the first fluid (water) receives in this spontaneous process.

Q₁ = Q₂

Q₁ = m₁ c (t - t₁)    and Q₂ = m₂ c (t₂ - t)  

where are they:  m₁ = 750 g, t₁ = 10°C, t₂ = 100°C, t = 75°C, m₂ = ?

m₁ c (t - t₁)  = m₂ c (t₂ - t) \ : c

Since water is the liquid in question, it has the same specific heat capacity. Therefore, we will divide both sides of the equation by c and get:

m₁ (t - t₁)  = m₂ (t₂ - t) =>  m₂ = m₁ (t - t₁) / (t₂ - t) =>

m₂ = 750 · (75 - 10) / (100 - 75) => m₂ = 750 · 65 / 25 = 1,950 g

m₂ = 1,950 g

God is with you!!!

4 0
4 years ago
What is earths magnetism
vivado [14]

Answer:

Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. ... On Earth, magma forms by partial melting of silicate rocks either in the mantle, continental or oceanic crust.

Explanation:

4 0
3 years ago
Read 2 more answers
Help me please. Please see attached for the questions with the graph
KatRina [158]

<u>Answer</u>

5) b-c

6)    a-b and

       e-f

7) f-g

9) a-b = 0 m/s

    c-d = 0.6667 m/s

    e-f = 0 m/s

    f-g = -3 m/s

10) b-c ⇒ The cart is acceleration.

   e-f ⇒ The cart is moving backwards with a constant velocity.

<u>Explanation</u>

Answer

5) b-c

In the section b-c the cart is accelerating because the slope of the graph is changing. The gradient that represent velocity is increasing.

6) a-b and e-f

At this sections the distance is not changing at all. This can only mean that the cart is not moving. It is at rest.

7) f-g

At this section the slope is negative meaning the cart is moving back to where it came from.

9) a-b = 0 m/s

At a-b the cart is not moving. So the velocity is zero.

<u>     c-d = 0.66667 m/s</u>

Velocity = distance / time

               =(50-40)/(40-25)

                = 10/15

                 = 0.6667  m/s

   <u> e-f = 0 m/s</u>

At e-f the cart is not moving. So the velocity is zero.

 <u>   f-g = -3 m/s</u>

Velocity = distance / time

               = (60-30)/(65-75)

                = 30/-10

                = - 3 m/s

10) b-c ⇒ The cart is acceleration.

   e-f ⇒ The cart is moving backwards with a constant velocity.

     

3 0
4 years ago
The Indianapolis Motor Speedway has four banked curves, each of which forms a quarter of a circle. Suppose a race car speeds alo
boyakko [2]

Answer:

r =  255.68 m

Explanation:

When a body moves in a circular path, an acceleration, due to constant change in its direction, is developed, known as centripetal acceleration. The centripetal acceleration acts towards the center of the circular path. The formula to calculate the centripetal acceleration is given as follows:

ac = v²/r

where,

ac = centripetal acceleration = 22 m/s²

v = tangential speed = 75 m/s

r = radius of curve = ?

Therefore,

22 m/s² = (75 m/s)²/r

r = (75 m/s)²/(22 m/s²)

<u>r =  255.68 m</u>

4 0
3 years ago
Which describes how chemical changes are different from physical changes?
lions [1.4K]

Answer:

B. Chemical changes involve the formation of a new substance.

Explanation:

They can both release energy, both can be measured, and chemical changes can be caused by oxygen, so I believe it would be B.

6 0
4 years ago
Other questions:
  • Some earthquake waves, a cat’s purr, and elephant communications consist of ultrasonic waves.
    13·2 answers
  • A steady beam of alpha particles (q = + 2e, mass m = 6.68 × 10-27 kg) traveling with constant kinetic energy 22 MeV carries a cu
    10·1 answer
  • What elements on the periodic table are metalloids?
    14·1 answer
  • (c)
    10·1 answer
  • A ball thrown straight up climbs for 3.0 sec before falling. Neglecting air resistance, with what velocity was the ball thrown?
    8·1 answer
  • The free-fall acceleration on Mars is 3.7 m/s2.
    12·1 answer
  • An object in the shape of a thin ring has radius a and mass M. A uniform sphere with mass m and radius R is placed with its cent
    6·1 answer
  • Define the artificial silk?​
    8·2 answers
  • WILL MARK BRAINLIEST!!!!
    11·1 answer
  • A 5.0 kg hammer strikes a 0.25 kg nail with a force of 10.0N, causing the nail to accelerate at 40.0m/s2. What is the accelerati
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!