Answer:
A. Far away stars show a red shift and B. Microwave background creation is found all over the observational universe
Explanation:
Red shift in color indicates that galaxies are moving away from Earth. This is proof that the Universe is continously expanding, which also supports the big bang theory.
The Big Bang theory predicts that the early universe was a very hot place and that as it expands, the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang, called the “cosmic microwave background".
I hope this helps :)
Answer:
-929.5Joules
Explanation:
To get the work done by sam, we will calculate the kinetic energy of sam expressed as;
KE = 1/2mv²
m is the mass = 1100kg
v is the velocity = 1.3m/s
KE = 1/2(1100)(1.3)²
KE = 550(1.69)
KE = 929.5Joules
Since Sam is opposing the direction of movement, work done by him will be a negative work i.e -929.5Joules
Temperature can be described as an indirect measure of heat energy
So therefore your answer should be letter C
Answer:
v = 20 m/s
Explanation:
Given that :
Initial Velocity of cars (u) = 0
Car with smaller mass = m
Car with larger mass = 2m
Final velocity of smaller mass = v
Final velocity of larger mass v2 = 10
Using the relation :
Initial momentum = final momentum
m1u1 + m2u2 = m1v1 + m2v2
Since u = 0
m1v1 + m2v2 = 0
mv + 2m * 10 = 0
mv + 20m = 0
mv = 20m
v = 20m / m
v = 20
Final velocity of larger mass car will be 20 m/s
Answer:
so two people can understand each other when presenting new ideas to each other
Explanation: