Mass doesn't change when something is placed on the moon, it's weight and gravitational pull from the moon do , though.
Answer:
The correct options are:
1) Protons
Explanation:
Brayons are composite subatomic particles which consist of odd number of valence quarks.Quarks are the fundamental particles in the nature that combine to form other particles such as neutrons and protons. In these composite subatomic particles strong nuclear forces dominate as compared to other fundamental forces in the nature.
A list of brayons includes (names are as represented in theory):
1) Proton's
2) Neutrons
3)Lambda
4) Sigma
5)Xi
6) Omega
7) Delta
Hence we find only proton is matching from the given options.
Answer:
The fastest object is the sphere, so it is the winner
Explanation:
To know which object will arrive faster down, let's look for the velocity of the center of mass of each object. Let's use the concept of mechanical energy
Highest point
Em₀ = U = mg y
Lowest point
= K = + = ½ I w² + ½ m ²
Angular velocity is related to linear velocity.
v = w r
w = v / r
= ½ I ²/r² + ½ m ²
= ½ (I / r² + m) ²
Energy is conserved
Em₀ =
mg y = ½ (I / r² + m) ²
= √2 g y / (I / mr² +1)
With this expression we can know which object arrives as a higher speed, therefore invests less time and is the winner. Let's calculate the speed of the center of mass of each
Ring
I = m r²
= √ (2 g y / (m r² / mr² + 1))
= √ (2gy 1/2)
= (√ 2gy) 0.707
Solid sphere
I = 2/5 m r²
= √ (2gy / (2/5 m r² / mr² + 1)
= √ (2gy / (7/5))
= √ (2gy 5/7)
= (√ 2gy) 0.845
Cylinder
I = ½ m r²
= √ (2gy / ½ mr² / mr² + 1)
= √ (2gy / (3/2))
= √ (2g y 2/3)
= (√ 2gy) 0.816
The fastest object is the sphere, so it is the winner when descending the ramp
observing models is a scientific greed of to test different combinations of stuff like experiments dealing with an unknown virus or poison ..that's why they have scientist , so they can testify on any experiment that is unsolved and unknown yet , so that's how they have models to help, to do experiments and test
25 x 10^-5
= 0.00025
25 cm
= 0.00025 km