Answer:
Explanation:
initial velocity = 24m/s
final velocity = 0 ( since she is coming to a rest )
time = 12 s
∴ acceleration = final velocity - initial velocity / time
= 0 -24 / 12
= -24/12
= -2 m/s
hope this helps
plz mark it as brainliest
The answer is B, as more lights are added to the circuit the voltage to each decreases
<u>Answer:</u> The remaining sample of X is 6.9 grams.
<u>Explanation:</u>
All the radioactive reactions follow first order kinetics.
The equation used to calculate rate constant from given half life for first order kinetics:
We are given:
Putting values in above equation, we get:
The equation used to calculate time period follows:
where,
= initial mass of sample X = 78 g
N = remaining mass of sample X = ? g
t = time = 16.5 min
k = rate constant =
Putting values in above equation, we get:
Hence, the remaining amount of sample X is 6.9 g
Advanced
smart
genius
intelligent
innovative
Explanation:
Momentum is directly proportional to velocity. If momentum of an object is doubled , but itsmass does not increase (so velocity remains below the speed of light) then its velocity isdoubled. If the velocity is doubled, then the kinetic energy increases by four times.