The car with bigger Mass requires more fuel because More mass the heavier it gets. you can't grab the little car fuel tank and put it in the big car it will run out to fast.
overall answer : The bigger the mass = more weight which means it needs more fuel to run
Give u = start velocity
v = end velocity
v = u + at
50 = 400 + a*30
30a = -350
a = -116.67 m/
**Why the accecleration is negative number**
Because displacement, velocity, and acceleration are VECTOR QUANTITIES.
Vector Quantity must have direction.
The number of protons tells you what element an atom is. Just knowing the number of neutrons/mass number does not tell you what element an atom is, since atoms of the same element can have different mass numbers. But all atoms with the same number of protons, are also always of the same element.
Hence, we can identify an atom by the number of protons it has
Answer:
option c) 0.88c is the correct answer
Explanation:
using the Lorrentz equation we have

where,
t = time taken to cover the distance
d = Distance
v = velocity
c = speed of light
given
d = 15 light years
Now,

or

or

or

or

or

or
