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tigry1 [53]
2 years ago
6

A girl weighing 45kg is standing on the floor, exerting a downward force of 200N on the floor. The force exerted on her by the f

loor is ..............
Select one:

a.
No force exerted


b.
Less than 2000N


c.
Equal to 200 N


d.
Greater than 200 N​
Physics
1 answer:
sukhopar [10]2 years ago
7 0

Answer:

c.

Equal to 200 N..........

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a. A 65-cm-diameter cyclotron uses a 500 V oscillating potential difference between the dees. What is the maximum kinetic energy
Sati [7]

Explanation:

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8 0
3 years ago
What is a solvent and a solute
artcher [175]

Answer:

solvent: the substance in which a solute dissolves to produce a homogeneous mixture. solute: the substance that dissolves in a solvent to produce a homogeneous mixture.

Explanation:

eSo basically  thats  aswer

7 0
3 years ago
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arr
Natalija [7]

Answer:

a) F = 680 N, b)  W = 215 .4 J , c)  F = 1278.4 N

Explanation:

a) Hooke's law is

              F = k x

To find the displacement (x) let's use the elastic energy equation

            K_{e} = ½ k x²

             k = 2 K_{e}  / x²

             k = 2 85.0 / 0.250²

             k = 2720 N / m

We replace and look for elastic force

            F = 2720  0.250

            F = 680 N

b) The definition of work is

          W = ΔEm

          W = K_{ef} - K_{eo}

          W = ½ k ( x_{f}² - x₀²)

The final distance

         x_{f} = 0.250 +0.220

        x_{f} = 0.4750 m

We calculate the work

          W = ½ 2720 (0.47² - 0.25²)

          W = 215 .4 J

We calculate the strength

          F = k x_{f}

          F = 2720 0.470

          F = 1278.4 N

6 0
3 years ago
How protons does Cl-38 have with the atomic number being 38
denis-greek [22]

Answer:

Explanation:

17

6 0
3 years ago
A rolling rock with a velocity of 20 m/s has a momentum of 5000 kg m/s. What is the rock’s mass
evablogger [386]

Answer:

<h2>250 kg</h2>

Explanation:

The mass of the rock can be found by using the formula

m =  \frac{p}{v}  \\

p is the momentum

v is the velocity

From the question we have

m =  \frac{5000}{20}  =  \frac{500}{2}  = 250 \\

We have the final answer as

<h3>250 kg</h3>

Hope this helps you

8 0
3 years ago
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