To solve the exercise it is necessary to apply the concepts of Mangenetic Force and Energy generated by electric potential.
By definition we know that the energy within an electron through voltage can be expressed as
Where,
e= charge of electron
V= Voltage
The kinetic energy of a moving system can be expressed as
Where,
m = mass
v = Velocity
For energy conservation we have to
Solving to find v,
On the other hand we have that the Magnetic Force can be expressed as,
Where,
q=charge of proton
v=velocity
B= Magnetic field
Angle between the magnetic field and the velocity vector (It is perpendicular in this case)
Using the previous equation from velocity in the Force equation we have,
PART A) Replacing the values to find the force we have,
Answer:
294 N
Explanation:
The weight of an object is the gravitational force exerted by the Earth on the object.
The direction of this force is always towards the Earth's centre, while the magnitude is given by:
where
W is the weight
m is the mass of the object
g is the acceleration due to gravity
Here we have:
m = 30 kg is the mass of the object
g = 9.8 N/kg is the acceleration due to gravity
So, the weight of the object is
Answer:
A closed system.
Explanation:
The three major types of system are: open, closed and isolated. Open system interacts with its surroundings with respect to its particles and energy. A closed system interacts with its surroundings with respect to energy but not its particles. While an isolated system does not interact with its surroundings in any way.
Therefore, after the jar is sealed, it is an example of a closed system. This is because the emitted gas could not escape into the surroundings, but thermal energy was emitted into its surroundings after the chemical reaction has taken place.
Answer:
Select the answer that states:
<em>VX = constant, and ay = -g</em>
Explanation:
In the case of an object undergoing projectile motion, such motion is divided in two analysis. The vertical analysis uses kinematic equations associated with an accelerated motion under the constant acceleration of gravity, and the horizontal analysis is that of a uniform motion at constant velocity.
Therefore the projectile motion uses the velocity in the horizontal (x-direction) as constant. and the vertical motion (associated with the y-axis) a motion with acceleration equal to "g".
Then, the corect answer is the one that states:
"<em>VX = constant, and ay = -g</em>"
