Answer:
Force, F = −229.72 N
Explanation:
Given that,
First charge particle,
Second charged particle,
Distance between charges, d = 0.0359 m
The electric force between the two charged particles is given by :
F = −229.72 N
So, the magnitude of force that one particle exerts on the other is 229.72 N. Hence, this is the required solution.
Displacement can be defined as the overall change in the position of the object. The displacement of the car in 5 hrs is 0 km.
Displacement:
It is a vector quantity that is defined as the overall change in the position of the object.
The formula for displacement is:
Where,
- total displacement
- final position
- initial position
In the given graph:
Therefore, the displacement of the car in 5 hrs is 0 km.
Learn more about Displacement:
Answer:
The angle of elevation of the Sun = 41.8°
Explanation:
Let the angle of elevation of the sun be θ
Using trigonometric relations,
Tan θ = opp/adj
opp = the height of the Washington Tower = 555 ft
adj = the length of the shadow = 620 ft
Tan θ = (555/620) = 0.8952
θ = Tan⁻¹ (0.8952) = 41.8°
Hence, the angle of elevation of the Sun = 41.8°
a) The distance of the image from the mirror is 15 cm
b) The size of the image is -2 cm (inverted)
Explanation:
a)
We can solve this first part of the problem by applying the mirror equation:
where
f is the focal length
p is the distance of the object from the mirror
q is the distance of the image from the mirror
For a mirror, the focal length is half the radius of curvature, R:
For this mirror, R = 20 cm, so its focal length is
(positive for a concave mirror)
Here we also know:
p = 30 cm is the distance of the object from the mirror
So, by applying the equation, we can find q:
b)
We can solve this part by using the magnification equation:
where
y' is the size of the image
y is the size of the object
q is the distance of the image from the mirror
p is the distance of the object from the mirror
Here we have:
q = 15 cm
p = 30 cm
y = 4 cm
Solving for y', we find the size of the image:
and the negative sign means that the image is inverted.
#LearnwithBrainly
Answer:
option A
Explanation:
Earth density can be deduced with the help of gravitational pull and the volume.
gravitational pull of the earth is equal to= ........(1)
We know, the volume of the earth, with the help of that we can calculate radius of the earth.
We know gravitational pull on earth = 9.8 m/s²
From equation (1) we can calculate the mass.
So, Density = mass/ Volume.
From the above expression we can calculate the density of earth.
Hence, the correct answer is option A