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sweet [91]
3 years ago
12

According to evidence presented in both the text and video, which statement is the most accurate regarding the relationship betw

een stress and the
immune system?
a.Stress activates foreign invaders that would otherwise lie dormant
b.Stress does not cause illness but restrains the immune system's ability to fight foreign invaders
c.Foreign agents invade the body and make it more susceptible to stressors
d.Stressors wear on the body, causing invading agents such as cancer to generate spontaneously
Physics
1 answer:
andrey2020 [161]3 years ago
4 0

Answer:

Stress does not cause illness, but restrains the immune system's ability to fight foreign invaders

Explanation:

It's correct :)

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PLEASE HELP WILL GIVE 10 POINTS!!!!!
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8 0
3 years ago
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puteri [66]

Answer:

magnitude of gravitational force between the Earth and the Sun at B is greater than that at A

Explanation:

Formula of gravitational force:

F = GMm/r^2

(r is the distance between 2 objects)

We see that r(B) < r(A) since at B, the Earth is closer to the Sun than at A

According to the Formula, the smaller r is, the greater F is

So, F(B) > F(A)

8 0
3 years ago
Two skaters collide and grab on to each other on frictionless ice. One of them, of mass 77.0 kg, is moving to the right at 4.00
Alex777 [14]

Answer:3.31m/s², to the right

Explanation:

According to the law of conservation of momentum of a body, change in momentum of bodies before collision is equal to the change in momentum after collision.

Momentum = mass × velocity

M1 and M2 be the masses of the first and second skaters respectively

Let u1 and u2 be the velocities of the first and second skaters respectively.

v be their common velocity after collision

M1 = 77kg M2 = 66kg u1 = 4m/s² u2 = 2.5m/s²

According to the law we have

M1u1 + M2u2 = (M1+M2)v

77(4) + 66(2.5) = (77+66)v

308 + 165 = 143v

V = 473/143

V = 3.31m/s²

Their velocity after collision will become 3.31m/s²

They will both move towards the right after collision because the mass of the body moving to the right is higher than the other mass and the mass is also moving at a higher velocity than the other.

5 0
3 years ago
Sometimes a new experimental result may seem to go against a well-established scientific theory. Which statement BEST describes
MrMuchimi
The best thing to do in this case is to redo the experiment and re record the info, it has to be precise and accurate so you also have to check if your procedure is correct. If the results are both accurate and precise then you have to report your findings to the committee of that specific field. <span />
7 0
3 years ago
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A gymnast is in a tucked position to complete her somersaults. While tucked her moment of inertia about an axis through the cent
torisob [31]

Answer:

\omega_s=12.8886\ rad.s^{-1}

Explanation:

Given that:

  • moment of inertia of tucked body, I_t=16\ kg.m^2
  • rotational speed of the body, N_t=2.5\ rev.s^{-1}
  • i.e. \omega_t=2\pi\times 2.5=15.708\ rad.s^{-1}
  • moment of inertia of  the straightened body, I_s=19.5\ kg.m^2

<u>Now using the law of conservation of angular momentum:</u>

angular momentum of tucked body=angular momentum of straight body

I_t.\omega_t=I_s.\omega_s

16\times 15.708=19.5\times \omega_s

\omega_s=12.8886\ rad.s^{-1}

8 0
3 years ago
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