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olga nikolaevna [1]
3 years ago
6

Jennifer regularly instructs her students to avoid believing age-old theories about the differences between men and women. “As i

t turns out”, she says, “men and women are far more alike than we are different.” Jennifer is explaining the... hypothesis
Physics
2 answers:
Agata [3.3K]3 years ago
6 0
The best answer would be a "non-directional hypothesis"
katrin2010 [14]3 years ago
6 0
Jennifer is stating a “Non-directional hypothesis” which means that the researcher has stated a relationship between the two variables, but is unable to identify the specific relationship that has relation to the two.
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Beginning at time t = 0, a student exerts a horizontal force on a box of mass 30 kg, causing it to move at 1.2 m/s toward an ele
Alexandra [31]
Since the initial and the final velocity are just equal, it is implied that the acceleration is zero. This means that the net force acting on the body is also zero. The horizontal force should be equal to the force of friction. The force of friction is equal to the product of the coefficient and the normal force. 
                               

 Ff = (coefficient of friction) x Fn


The normal force is equal to the object's weight if the surface is horizontal.


                               Ff = (0.20) x (30 kg) x (9.8 m/s²)  = 58.8 N
<span>

<span>Thus, the horizontal force exerted must be 58.8 N. 

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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

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6 0
3 years ago
9. Rob Colley set a record in “pole-sitting" when he spent 42 days in a barrel at the
Vsevolod [243]

Answer:

3 sec

Explanation:

T=squareroot((2*-43)/-9.81)

4 0
3 years ago
Batman recharges his Bat-taser with 2.5mj of energy in 15 minutes. How much power does it draw from the mains?
Gennadij [26K]

That would be 0.16 per min

7 0
3 years ago
Penny puts Fluffy in one wagon and pushes the wagon, once, as hard as she can. Penny puts Butch in the other wagon and pushes it
loris [4]
D;  the wagons will both move in the same way
4 0
4 years ago
Read 2 more answers
A particle is moving with (SHM) of period 8.0s and amplitude5.0m
nadezda [96]

Answer:

velocity(x)=15\,\frac{\pi}{4}\,cos(\frac{\pi}{4}x)

Max speed = \frac{15\, \pi}{4} \,\, \frac{m}{s}

Max acceleration = \frac{15\,\pi^2}{16} \,\,\frac{m}{s^2}

Explanation:

Given the description of period and amplitude, the SHM could be described by:

f(x)=5\,sin(\frac{\pi}{4}x)

and its angular velocity can be calculated doing the derivative:

f(x)=5\, \,sin(\frac{\pi}{4}x)\\f'(x)=5\,\frac{\pi}{4}\,cos(\frac{\pi}{4}x)

And therefore, the tangential velocity is calculated by multiplying this expression times the radius of the movement (3 m):

velocity(x)=15\,\frac{\pi}{4}\,cos(\frac{\pi}{4}x)  and is given in m/s.

Then the maximum speed is obtained when the cosine function becomes "1", and that gives:

Max speed = \frac{15\, \pi}{4} \,\, \frac{m}{s}

The acceleration is found from the derivative of the velocity expression, and therefore given by:

acceleraton(x)=-15\,\frac{\pi^2}{16}\,sin(\frac{\pi}{4}x)

and the maximum of the function will be obtained when the sine expression becomes "-1", which will render:

Max acceleration = \frac{15\,\pi^2}{16} \,\,\frac{m}{s^2}

6 0
3 years ago
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