Answer:
The maximum height reached by the ball is 20 meters
Explanation:
Given that,
Height, h = 10 m
Potential energy at the height of 10 m,
The ball is moving upward with a kinetic energy of 50 Joules
Let h is the maximum height reached by the ball. At a height of 10 meters above the ground, the energy is given by :
mg = 5 N
At this point, total energy will be 100 J. We know that the velocity is zero at maximum height. So, the ball possess only potential energy. it is given by :
h = 20 meters
So, the maximum height reached by the ball is 20 meters. Hence, this is the required solution.
Answer:
The one at the front is the driver. he one at the back is the brakeman.
Explanation:
In either a two or a four person bobsled team, the one at the front of the sled is called driver. The one at the back is called the brakeman, and is the one that pushes the back of the sled. The brakeman is the one that jumps in last as the sled gains speed.
In case of the four person, the other two team participants are just referred as riders.
Answer:
+ 0.07 C
Explanation:
From the question given above, the following data were obtained:
Potential difference (V) = 12 V
Energy (E) = 0.418 J
Charge (Q) =?
The energy (E) , potential difference (V) and charge (Q) are related by the following equation:
E = ½QV
With the above formula, we can obtain the charge as follow:
Potential difference (V) = 12 V
Energy (E) = 0.418 J
Charge (Q) =?
E = ½QV
0.418 = ½ × Q × 12
0.418 = Q × 6
Divide both side by 6
Q = 0.418 / 6
Q = + 0.07 C
Answer:
36.22 mA
Explanation:
i1 = I , i2 = I, d = 8.2 cm = 0.082 m
Force per unit length = 3.2 nN/m = 3.2 x 10^-9 N/m
μo = 4 π × 10^-7 Tm/A
The formula for the force per unit length between the two wires is given by
F = μo / 4π x (2 i1 x i2) / d
3.2 x 10^-9 = 10^-7 x 2 x I^2 / 0.082
I = 0.0362 A = 36.22 mA
<h2>
Answer: electrons sometimes behave like waves
</h2>
The French physicist <em>Louis De Broglie</em> proposed the existence of matter waves, that is to say that <em>all matter has a wave associated with it</em>.
On the other hand, <em>Heisenberg</em> enunciated the uncertainty principle, which postulates that the fact that each particle has a wave associated with it, imposes restrictions on the ability to determine its position and speed at the same time.
These postulations were tested with the double slit experiment (<u>formerly applied to photons</u>) applied to electrons, and the result was: electrons (as well as the other particles different from the photons) are able to behave as waves.