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3 years ago

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_____ is the degrees to which operational definitions reflect the true theoretical meaning of the variable. 1. Validity 2. Moder

ation 3. Mediation 4. Reliability 5. All of these

1 answer:

tatiyna3 years ago

3 0

Answer:

Validity

Explanation:

Validity or construct validity is the sufficiency of the operational meaning of factors.. It measures the extent to which the the operational meaning of a variable really mirrors the genuine hypothetical importance of the variable.

Validity alludes to how much deductions can authentically be produced using the operationalizations in your investigation to the hypothetical builds on which those operationalizations were made.

validity is identified with generalization.

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2. You and a friend are spending a weekend at a carnival. You get bored and begin to make electrostatics measurements. It turns

aleksklad [387]

Answer:

B) -2 Coulombs

Explanation:

In order to find the net charge, we must add the charge that you have with the charge that your friend has, but taking into account the different sign. In fact, we have:

- Charge possessed by you: Q1 = +3 C

- Charge possessed by your friend: Q2 = -5 C

Therefore, the net charge possessed by both persons will be given by

Q = Q1 + Q2 = +3 C + (-5 C) = +3 C - 5 C = -2 C

8 0

3 years ago

When a particle of charge q moves with a velocity v⃗ in a magnetic field B⃗ , the particle is acted upon by a force F⃗ exerted b

melomori [17]

Answer:

$3.8\cdot 10^{-16}N$

Explanation:

For a charged particle moving perpendicularly to a magnetic field, the magnitude of the force exerted on the particle is:

$F=qvB$

where

q is the magnitude of the charge of the particle

v is the velocity of the particle

B is the magnetic field strength

In this problem, we have

$q=e=1.6\cdot 10^{-19}$ is the charge of the electron

$v=6.0\cdot 10^6 m/s$ is the velocity

$B=4.0\cdot 10^{-4}T$ is the magnetic field

Substituting into the formula, we find the force:

$F=(1.6\cdot 10^{-19} C)(6.0\cdot 10^6 m/s)(4.0\cdot 10^{-4}T)=3.8\cdot 10^{-16}N$

8 0

4 years ago

olga nikolaevna [1]

As he lifts the sack to his chest from the floor

5 0

4 years ago

Read 2 more answers

Write a scientific explanation how the position of an object affects the amount of potential energy the object possesses

garik1379 [7]

The gravitational potential energy of an object is directly proportional to its height above the ground

Explanation:

The gravitational potential energy (GPE) of an object is the amount of energy possessed by the object due to its position in a gravitational field.

Near the Earth's surface, the GPE of an object is given by:

$GPE=mgh$

where:

m is the mass of the object

$g=9.8 m/s^2$ is the acceleration of gravity

h is the heigth of the object measured relative to the ground

As we see from the equation, the GPE is directly proportional to h, the height above the ground. This means that:

- If the object is lifted (h increases), its GPE also increases

- If the object is lowered (h decreases), its GPE also decreases

Learn more about gravitational potential energy here:

brainly.com/question/1198647

brainly.com/question/10770261

#LearnwithBrainly

5 0

3 years ago

A 68.0-kg person throws a 0.0405-kg snowball forward with a ground speed of 31.5 m/s. A second person, with a mass of 56.0 kg, c

Mumz [18]

Answer:

vf1=2.03 m/s

vf2=0.026 m/s

Explanation:

$m_{p1}=68 kg$

$m_{s}=0.045 kg$

$m_{p2}=56 kg$

$v_{s1}=31.5\frac{m}{s}$

$v_{p1}=2.05\frac{m}{s}$

$v_{p2}=0\frac{m}{s}$

Collision elastic in the moment thrown the snowball

$(m_{p1}+m_{s})*v_{p1}=m_{p1}*v_{f1}+m_{s1}*v_{s1}$

$v_{f1}=\frac{(68kg+0.045kg)*2.05\frac{m}{s}-0.045kg*31.5\frac{m}{s}}{68kg}$

$v_{f1}=2.03\frac{m}{s}$

$m_{s1}*v_{s1}+m_{p2}*v_{2}=(m_{s}+m_{2})*v_{f2}$

$v_{f2}=\frac{0.045kg*31.5\frac{m}{s}}{56kg+0.045kg}$

$v_{f1}=0.0262\frac{m}{s}$

8 0

3 years ago