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Svetlanka [38]
3 years ago
7

The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of posi

tive charge is often called the __________ model. (Points : 1)
electron cloud

raisin bread

molecular

nuclear
Physics
2 answers:
kirza4 [7]3 years ago
8 0
Electrons trapped in a mass of positive charge is often called the raisin bread model
irina [24]3 years ago
5 0
That type of model was called the raisin bread model, founded by JJ Thompson.
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A published hypothesis:
kow [346]

Answer:

should be tested by the scientific community

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The velocity of sound in air at STP (Standard Temperature and Pressure) is approximately 344 m/s. If the frequency of the sound
exis [7]

Answer:

0.066m

Explanation:

use the formula

velocity= frequency × wave length

344m/s = 5200Hz× wavelength

wavelength = 344m/s/5200Hz

wavelength = 0.066m(to 2 sig fig)

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3 years ago
6. Kinetic energy depends upon<br> and the<br> of the object
Musya8 [376]
I don’t understand your question?
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3 years ago
You are standing on the bottom of a lake with your torso above water. Which statement is correct?
marishachu [46]

Answer:

c. There is a buoyant force that is proportional to the volume of your body that is below the level of the water.

Explanation:

Buoyancy can be defined as a force which is created by the water displaced by an object.

Simply stated, buoyancy is directly proportional to the amount of water that is being displaced by an object.

Hence, the greater the amount of water an object displaces; the greater is the force of buoyancy pushing the object up.

The buoyancy of an object is given by the formula;

Fb = pgV

But, \; V = Ah

Hence, \; Fb = pgAh

Where;

Fb = buoyant force of a liquid acting on an object.

g = acceleration due to gravity.

p = density of the liquid.

v = volume of the liquid displaced.

h = height of liquid (water) displaced by an object.

A = surface area of the floating object.

The unit of measurement for buoyancy is Newton (N).

In this scenario, you are standing on the bottom of a lake with your torso above water. Thus, there is a buoyant force that is proportional to the volume of your body that is below the level of the water.

3 0
3 years ago
On her camping trip, Penelope was in charge of collecting firewood. The firewood she found had a mass of 120 g and a volume of 4
zloy xaker [14]
From the formula: density=mass/volume
But first, we have to convert the cm³ to m³ by multiplying the value in cm³ by 10^-6, by so doing we'll have the volume to be 0.48*10^-3cm³.
we will also need to convert the mass which is in g to kg by simply dividing by 1000 so the mass becomes 0.12kg
Now we can solve for the density using the formula I earlier stated which is the mass divided by the volume =0.12/0.48*10^-3 so the density will be 0.25*10^3kgm-3 or 2.5*10^2kgm-3
3 0
3 years ago
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