All categories

3 years ago

URGENT! who hypothesized that electrons orbit around a nucleus?

Physics

1 answer:

artcher [175]3 years ago

5 0

Pretty sure it's Niels Bohr

You might be interested in

The density of air at room temperature is about 1.2 g/L. This is the same as

Verdich [7]

The correct answer is
<span>C) 1200 g/m3.

Let's see why. The relationship between liters and cube decimeters is
</span> $1 L = 1 dm^3$
Therefore,
$1 g/L= 1 g/dm^3$
However, we also know that
$1 dm^3 = 10^{-3} m^3$
Therefore,
$1 L = 10^{-3} m^3$
and
$1 \frac{g}{L}= 1 \frac{g}{10^{-3} m^3} =1 \cdot 10^3 \frac{g}{m^3} =1000 \frac{g}{m^3}$

Therefore, the density of the problem $1.2 g/L$ becomes
$d=1.2 g/L=1200 g/m^3$

3 0

3 years ago

Geologic time is divided into units based upon types of ___. A-sedimentary rocks. B-climate changes. C-organisms. D-igneous rock

olga2289 [7]

C organisms Hope this helps. :)

4 0

4 years ago

Read 2 more answers

A stone is dropped into a river from a bridge at a height h above the water. Another stone is thrown vertically down at a time t

Mumz [18]

Answer:

$v_{y_0} = \frac{\frac{g}{2}t(t - 2\sqrt{\frac{2h}{g}})}{\sqrt{\frac{2h}{g}} - t}$

Explanation:

We will apply the equations of kinematics to both stones separately.

First stone:

Let us denote the time spent after the second stone is thrown as 'T'.

$y - y_0 = v_{y_0}(t+T) + \frac{1}{2}a(t+T)^2\\0 - h = 0 + \frac{1}{2}(-g)(t+T)^2\\(t+T)^2 = \frac{2h}{g}\\T = \sqrt{\frac{2h}{g}}-t$

Second stone:

$y - y_0 = v_{y_0}T + \frac{1}{2}aT^2\\0 - h = v_{y_0}T -\frac{1}{2}gT^2\\-h = v_{y_0}(\sqrt{\frac{2h}{g}} - t) - \frac{g}{2}(\sqrt{\frac{2h}{g}} - t)^2\\-h = v_{y_0}(\sqrt{\frac{2h}{g}} - t) - \frac{g}{2}(\frac{2h}{g} + t^2 - 2t\sqrt{\frac{2h}{g}})\\-h = v_{y_0}\sqrt{\frac{2h}{g}} - v_{y_0}t - h -\frac{g}{2}t^2 + gt\sqrt{\frac{2h}{g}}\\v_{y_0}(\sqrt{\frac{2h}{g}} - t) = \frac{g}{2}t^2 - gt\sqrt{\frac{2h}{g}}\\v_{y_0} = \frac{\frac{g}{2}t(t - 2\sqrt{\frac{2h}{g}})}{\sqrt{\frac{2h}{g}} - t}$

6 0

3 years ago

Read 2 more answers

Suppose a certain battery has an internal emf of 9.00 V but the potential difference across its terminals is only 80.0 % of that

Rudiy27

Answer:

$1140.48\times 10^{-6}J$

Explanation:

We have given that the battery has an internal emf of 9 volt

So E = 9 volt

Capacitance $C=44\mu F=44\times 10^{-6}F$

It is given that on the terminal voltage is only 80% of potential difference

So V = 0.8×9 = 7.2 volt

We know that energy stored in the capacitor is given by

$E=\frac{1}{2}CV^2=\frac{1}{2}\times 44\times 10^{-6}\times 7.2^2=1140.48\times 10^{-6}J$

8 0

3 years ago

Why does a catalyst cause a reaction to proceed faster??

prohojiy [21]

The activation energy is lowered only
There are more collisions per second and the collisions are of greater energy
There are more collisions per second only
The activation energy is lowered

7 0

4 years ago

Read 2 more answers