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3 years ago

A researcher claiming that females were more empathetic than males would test that hypothesis by using __________ statistics.

2 answers:

6 0

<span>A researcher claiming that females were more empathetic than males would test that hypothesis by using inferential statistics.</span>

sergeinik [125]3 years ago

6 0

inferential is the correct answer because it goes with it and because my uncle is here and he taught me this but it really is the correct answer

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Why reaction force must exist

Fittoniya [83]

Newton's 3rd law:
Every action has an equal and opposite reaction.
When you apply force on an object, there is an equal force applied on you from that object.

7 0

2 years ago

A certain string just breaks when it is under400N of tension.

OLEGan [10]

Answer:

The string will break with a speed of 20 m/s.

Explanation:

It is given that,

Tension at which the string just breaks, T = 400 N

Mass of the stone, m = 10 kg

Radius of the circle, r = 10 m

We need to find the speed at which the string will break. The boy continuously increases the speed of the stone. The tension acting on the stone is equal to the centripetal force. It is a force that acts towards the center of circle. It is given by :

$T=F=\dfrac{mv^2}{r}$

$v=\sqrt{\dfrac{Tr}{m}}$

$v=\sqrt{\dfrac{400\ N\times 10\ m}{10\ kg}}$

v = 20 m/s

So, the string will break with a speed of 20 m/s. Hence, this is the required solution.

4 0

3 years ago

Despite their extensive applications in communication systems, radio waves a not the only form of EM waves present in our atmosp

tiny-mole [99]

Let us assume that the definition of frequency, wavelength and wave speed is determined by the function

$f = \frac{v}{\lambda}$

Here,

v = Velocity of wave

$\lambda$ = Wavelength

f = Frequency

We know that the earth has the ability to absorb visible light but that it can also emit a longer radiation wavelength. This assessment allows us to confirm that option A. Is correct. In turn, if said wavelength is large, being inversely proportional to the frequency,

$\lambda \propto \frac{1}{f}$

This does tend to be lower radiation. The correct options are:

A.The earth absorbs visible light and emits radiation with a longer wavelength.

B.The earth absorbs visible light and emits radiation with a lower frequency.

3 0

3 years ago

The pH of your mouth is very similar to that of stomach. True or false?

Darina [25.2K]

Answer:

False

Explanation:

5 0

2 years ago

a 3.5 kg book is sliding on a desk. The coefficient of kinetic friction between surfaces is 0.2.What is the size of the force of

Tresset [83]

The formula for the force of Kinetic friction is:
$F_{k} =$ μ*N

Please consider μ as the coefficient of the kinetic friction = 0.2
N = Normal to the desk = m*g = 3.5 * 9.8 = 34.3 N
$F_{k} =$ Force of Kinetic Friction = ?

Therefore,
The force of Kinetic Friction = $F_{k} =$ 0.2 * 34.3
$F_{k} =$ 6.86N

The size of force of Kinetic Friction = 6.86N.

6 0

3 years ago