All categories

3 years ago

The first model of the atom was developed through what?

Physics

2 answers:

Karolina [17]3 years ago

6 0

Answer:

scientific experimentation and data analysis with water vapor and gases.

Explanation:

Don't listen to daylin55555 she is wrong. I took the test.

Dennis_Churaev [7]3 years ago

5 0

Democritus Introduces the Atom
He thought that a point would be reached where matter could not be cut into still smaller pieces. He called these "uncuttable" pieces atomos. This is where the modern term atom comes from. Democritus first introduced the idea of the atom almost 2500 years ago.

You might be interested in

Which process is represented by the PV diagram?

Reika [66]

Hi!

The answer would be A. Isobaric Process

<h3>Explanation:</h3>

Isobaric process is a process where the pressure inside a system remains unchanged. In the Pressure Volume graph given, you can see that the pressure (y axis) remains constant with an increasing volume ( x axis). An example of this would be heating a container with a movable piston. Now, the degree of pressure is dependent on the frequency of collisions of particles inside a system on the walls. If this frequency changes, the pressure changes (proportionally). In our example, heating a container with a movable piston results in the particles inside the container to gain kinetic energy and move faster, meaning an increased frequency of collisions (higher pressure), but at the system time the increase in pressure results in the piston being pushed outwards, causing the volume of the container to increase. This results in decreased frequency of collision of the particles with the walls of the container (lesser pressure). This results in the a zero net effect on the pressure.

Hope this helps!

3 0

4 years ago

Any substance that yields a hydrogen ion when placed in a water solution is called a(n) _____ will mark brainly

krok68 [10]

<span>Any substance that yields a hydrogen ion when placed in a water solution is called an acid.</span>

8 0

4 years ago

Read 2 more answers

Q.1) The crane arm is pinned at point A and has a mass of 200 kg whose weight is acting at a point 2 m to the right of point A.

Sveta_85 [38]

Answer:

a) Fbc = 22692.23 N

b) Ax = 10148.276 N (→)

Ay = 10486.552 N (↓)

Explanation:

Given

Mass of the crane arm: M = 200 Kg

rM = 2.00 m

Mass of the block: m = 800 Kg

rm = 7.00 m

Fbc = ?

rbcx = (1.80 + 1.20) m = 3.00 m

rbcy = (2.40 - 1.00) m = 1.40 m

a) We apply rotational equilibrium around point A as follows

∑τ = 0 (Counterclockwise is the positive rotation direction)

rbcx*Fbcx + rbcy*Fbcy - rM*WM - rm*Wm = 0 (I)

From the pic we have the Right triangle where

BC² = 1.2²+2.4² = 7.2 ⇒ BC = √7.2 = 2.683

then

Cos ∅ = 1.2/2.683 = 0.447

Sin ∅ = 2.4/2.683 = 0.894

Fbcx = Fbc*Cos ∅

⇒ Fbcx = 0.447*Fbc

Fbcy = Fbc*Sin ∅

⇒ Fbcy = 0.894*Fbc

Now, we obtain

3.00*(0.447*Fbc) + 1.40*(0.894*Fbc) - 2.00*(200*9.81) - 7.00*(800*9.81) = 0

⇒ 1.342*Fbc + 1.252*Fbc - 3924 - 54936 = 0

⇒ 2.594*Fbc = 58860

⇒ Fbc = 22692.23 N

b) We apply

∑Fx = 0 (+→)

⇒ Ax - Fbcx = 0

⇒ Ax = Fbcx = 0.447*Fbc = 0.447*(22692.23 N)

⇒ Ax = 10148.276 N (→)

∑Fy = 0 (+→)

⇒ Ay + Fbcy - WM - Wm = 0

⇒ Ay = - Fbcy + WM + Wm

⇒ Ay = - 0.894*Fbc + m*g + M*g

⇒ Ay = - 0.894*(22692.23 N) + (800 Kg*9.81 m/s²) + (200 kg*9.81 m/s²)

⇒ Ay = 10486.552 N (↓)

3 0

3 years ago

A spring is compressed by 15 cm when 400 N of force is applied. What is the spring constant of the spring?

Helga [31]

Answer:

2666.7 N/m

Explanation:

Spring constant = force / displacement

k = F / x

k = 400 N / 0.15 m

k = 2666.7 N/m

8 0

4 years ago

How is it possible for two objects to experience a collision that results in different accelerations?

den301095 [7]

Two colliding objects will exert equal forces upon each other. If the objects have different masses, then these equal forces will produce different accelerations.

3 0

3 years ago