Answer:
Force exerted on the car = 4,000 N
Explanation:
Mass of the car (m) = 2000 kg
Acceleration(a) = 2 m/sec²
By Newton's second law of motion,
F (force) = m a
Putting the values of m and a
= 2000 x 2 = 4,000 N
The given question is incomplete. The complete question is as follows.
The irregularly shaped area of charge in the figure has surface charge density ηi. Each dimension (x and y) of the area is reduced by a factor of 3.68.
What is the ratio ηf/ηi where ηf is the final surface charge density? I found this value to be 13.5 and it is correct
An electron is very far from the area. What is the ratioFf/Fi of the electric force on the electronafter the area is reduced to the force before the area wasreduced? I found this to also be 13.5, but it is wrong.
Explanation:
Let us consider that expression for area will be as follows.
Area () =
As,
= 13.5
Also, = 1
As the electron is very far from the area. Hence, it can be considered as a point charge. Whereas charge is also constant as the force is not changing.
Answer:
The structure of the earth divides into three main layers, the core that is the innermost, the mantle, and the crust. The earth's crust is the last solid layer of the planet, it has a thickness of between 5km and 70km.
It is the thinnest layer compared to the others that have thicknesses of hundreds to thousands of kilometers.
The crust is also the least dense layer compared to the mantle and the core.
It has an average density of , while that of the mantle is and that of the core is on average .
Answer: Given:
Initial velocity= 36km/h=36x5/18=10m/s
Final velocity =54km/h=54x5/18=15m/s
Time =10sec
Acceleration = v-u/ t
=15-10/10=5/10=1/2=0.5 m/s2
Distance =s=?
From second equation of motion:
S=ut +1/2 at^2
=10*10+1/2*0.5*10*10
=100+25
=125m
So distance travelled 125m
Hope it helps you
Answer:
Most pneumonia occurs when a breakdown in your body's natural defenses allows germs to invade and multiply within your lungs.
Explanation: