Answer:
Ratio of power produced by new to old car is 16:1
Explanation:
Assuming both cars have the same mass m
Let KE1 and KE2 be the kinetic energies of the old and new car respectively.
v1 = v
and v2 = 4v
KE1 = 1/2mv1² = 1/2mv²
KE2 = 1/2mv2² = 1/2m(4v)² = 1/2×m×16v² = 8mv²
Ratio of the power produced by the new car to the old one is simply KE2/KE1 =8mv²/1/2mv² = 16
Since the same time interval is given.
Look at periodic table and see that it is metal .
Answer:
a) heavier on sun
b) 63.0 kN
Explanation:
The weight is directly related to gravity, so because the sun has a bigger gravity than earth the barbell will be heavier on the sun.
the force exerted by the gravity is defined as:
Answer:
B. 90km/hr
Explanation:
The formula for finding velocity =
Displacement/time
The displacement of the car has been given to be = 1215 km West
Time it took to go from Dallas to Paso = 13.5 hours
Then velocity = 1215/13.5
= 90
Therefore velocity = 90km/hour
Option B is the correct answer to this question.
Thank you!
<span>When a glass fragment in silicon oil is heated and cooled, the refractive index of the glass has been found when both the becke lines and the glass will disappear. As the oil refractive index changes in the process of heating so that it equals the glass refractive index, the fragment edges fade.</span>