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jonny [76]
3 years ago
7

What is the name of the following atoms?

Physics
2 answers:
deff fn [24]3 years ago
8 0
The answer is A..................
Ulleksa [173]3 years ago
4 0

Answer:

an atom with 3 protons and 4 neutrons

Explanation:

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A 1-kg rock is suspended from the tip of a horizontal meterstick at the 0-cm mark so that the meterstick barely balances like a
tigry1 [53]

Explanation:

Given that,

Mass if the rock, m = 1 kg

It is  suspended from the tip of a horizontal meter stick at the 0-cm mark so that the meter stick barely balances like a seesaw when its fulcrum is at the 12.5-cm mark.

We need to find the mass of the meter stick. The force acting by the stone is

F = 1 × 9.8 = 9.8 N

Let W be the weight of the meter stick. If the net torque is zero on the stick then the stick does not move and it remains in equilibrium condition. So, taking torque about the pivot.

9.8\times 12.5=W\times (50-12.5)\\\\W=\dfrac{9.8\times 12.5}{37.5}

W = 3.266 N

The mass of the meters stick is :

m=\dfrac{W}{g}\\\\m=\dfrac{3.266}{9.81}\\\\m=0.333\ kg

So, the mass of the meter stick is 0.333 kg.

5 0
3 years ago
What is the name of the black hole in the center of the milky way
densk [106]

Answer:

Sagittarius A

Explanation:

The center of the milky way has a big giant hole known as "Sagittarius A". The size is 4 million times bigger than the sun.

4 0
3 years ago
A student standing on a cliff that is a vertical height d = 8.0 m above the level ground throws a stone with velocity v0 = 24 m/
PilotLPTM [1.2K]

Answer:

a) Vf = 27.13 m/s

b) It would have been the same

Explanation:

On the y-axis:

Y=-Vo*sin\theta*t-1/2*g*t^2

-8=-24*sin(21)*t-1/2*10*t^2

Solving for t:

t1 = 0.67s     t2= -2.4s

Discarding the negative value and using the positive one to calculate the velocity:

Vf_y = -Vo*sin\theta-g*t

Vf_y = -15.3m/s

So, the module of the velocity will be:

Vf=\sqrt{(-15.3)^2+(24*cos(21))^2}

Vf=27.13m/s

If you throw it above horizontal, it would go up first, and when it reached the initial height, the velocity would be the same at the throwing instant. And starting then, the movement will be the same.

3 0
3 years ago
The force of attraction that the Earth exerts on all objects is called _____. mass weight gravity inertia
Annette [7]
Gravity. Hope this helped! Good luck :)
8 0
3 years ago
Read 2 more answers
Many physiological conditions are related to particular proteins in cell membranes. The number of insulin receptors in membranes
Afina-wow [57]

Answer: This is an example of downregulation and upregulation.

Explanation:

Downregulation is a process in which cells decrease the production of one of their components, responding to an external stimulus. Upregulation, on the other hand, is when cells increase the production of one of their components in response to an external stimulus.

In this case, the decrease in insulin receptors would make the cell less sensitive to the hormone.

If there's a lot of insulin around those cells, the cell would have to decrease its sensitivity, otherwise, it would metabolise more glucose than the body needs. The contrary would happen if there was too little insulin around those cells, they would have to become more sensitive to it by increasing the number of receptors.

8 0
3 years ago
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