In a certain region of space, a uniform electric field is in the x direction. A particle with negative charge is carried from x
1 answer:
Answer:
(a) increase
Explanation:
On a line graph; we have the x-axis to the positive side and the negative side .In a positive x-axis direction, the force is usually positive, vice versa the negative side as well.
The change in the potential energy of a charge field-system can be given as:
where;
q = positive test charge
E = Electric field
ds = displacement between thee charge positions
θ = Angle between the electric field and the displacement.
Given that:
Charge of the particle = -q
displacement = (60.0 -20.0)cm = 40.0 cm
θ = 0
Replacing our values in the above equation, we have:
Since the potential energy of the system is positive, therefor the electric potential energy also increases.
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The mass of the car is 2000 kg
Explanation:
We can solve this problem by using Newton's second law of motion, which states that the net force acting on an object is equal to the product between the mass of the object and its acceleration:
where
is the net force
m is the mass
a is the acceleration
In this problem, we have:
is the acceleration of the car
Each person applies a force of 400 N, and there are five men, so the total force applied is
Therefore, the mass of the car is:
Learn more about Newton's second law of motion:
#LearnwithBrainly
Answer:
a) Indeed, the linear speed of the ultracentrifuge is 0.524 kilometers per second.
b) Indeed, the linear speed of the Earth in its orbits about the Sun is approximately 30 kilometers per second.
Explanation:
The linear speed of the particle (), measured in kilometers per second, rotating in a circular pattern is calculated by the following formula:
(1)
Where:
- Radius, measured in kilometers.
- Angular speed, measured in radians per second.
Now we proceed to calculate the linear speed of each element:
a) Ultracentrifuge
If we know that and
, then the linear velocity is:
Indeed, the linear speed of the ultracentrifuge is 0.524 kilometers per second.
b) Earth
The Earth is 150 million kilometers away from the Sun and takes 365 days to complete one revolution around the Sun. First, we calculate angular speed of the planet:
(2)
Where is the period, measured in seconds.
If we know that , then the angular speed of the Earth is:
Now, we determine the linear speed:
Indeed, the linear speed of the Earth in its orbits about the Sun is approximately 30 kilometers per second.