Answer:c
Explanation:
The buoyancy force on toy depends upon the volume of toy under pool water.
According to Archimedes principle buoyant force on a floating body depends upon the weight of displaced liquid by object.
Buoyancy force is given by
![F_b=\rho _f\times V\times g](https://tex.z-dn.net/?f=F_b%3D%5Crho%20_f%5Ctimes%20V%5Ctimes%20g)
where
=density of fluid
V=volume of object under water
g=acceleration due to gravity
Answer:
d. a large region outside Jupiter occupied by its magnetic field and filled with high-energy charged particles.
Explanation:
A magnetic field is generated by the movement of a charged particle in the space around it. For the case of Jupiter its magnetic field is created by the liquid metallic hydrogen in its core.
So the magnetosphere is just the magnetic field around a planet, which interacts with high-energy charged particles (for example: Cosmic Rays).
Magnetospheres protect planets from the extreme radiation coming from stars or another interstellar source.
The answer is Light rays are reflected by mirrors
Explanation:
Given that,
Initial speed of the car, u = 88 km/h = 24.44 m/s
Reaction time, t = 2 s
Distance covered during this time, ![d=24.44\times 2=48.88\ m](https://tex.z-dn.net/?f=d%3D24.44%5Ctimes%202%3D48.88%5C%20m)
(a) Acceleration, ![a=-4\ m/s^2](https://tex.z-dn.net/?f=a%3D-4%5C%20m%2Fs%5E2)
We need to find the stopping distance, v = 0. It can be calculated using the third equation of motion as :
![s=\dfrac{v^2-u^2}{2a}](https://tex.z-dn.net/?f=s%3D%5Cdfrac%7Bv%5E2-u%5E2%7D%7B2a%7D)
![s=\dfrac{-(24.44)^2}{2\times -4}](https://tex.z-dn.net/?f=s%3D%5Cdfrac%7B-%2824.44%29%5E2%7D%7B2%5Ctimes%20-4%7D)
s = 74.66 meters
s = 74.66 + 48.88 = 123.54 meters
(b) Acceleration, ![a=-8\ m/s^2](https://tex.z-dn.net/?f=a%3D-8%5C%20m%2Fs%5E2)
![s=\dfrac{v^2-u^2}{2a}](https://tex.z-dn.net/?f=s%3D%5Cdfrac%7Bv%5E2-u%5E2%7D%7B2a%7D)
![s=\dfrac{-(24.44)^2}{2\times -8}](https://tex.z-dn.net/?f=s%3D%5Cdfrac%7B-%2824.44%29%5E2%7D%7B2%5Ctimes%20-8%7D)
s = 37.33 meters
s = 37.33 + 48.88 = 86.21 meters
Hence, this is the required solution.
Protista, fungi, plantae and animalia