Kinetic energy = (1/2) x (mass) x (speed)²
8 joules = (1/2 x 1 kg) x (speed)²
Divide each side by 1/2kg : 8 joules / 0.5 kg = speed²
Take the square root of each side:
speed = √[ (8 kg-m²/sec²) / (0.5 kg) ]
= √ (8 m²/sec²)
= √8 m/s = 2.83 m/s (rounded)
Answer:
They are too busy doing their own work
Answer:
22,800 years
Explanation:
Half life equation:
A = A₀ (½)^(t / T)
where A is the final amount,
A₀ is the initial amount,
t is time,
and T is the half life.
0.0625 = (½)^(t / 5700)
log 0.0625 = (t / 5700) log 0.5
4 = t / 5700
t = 22,800
It takes 22,800 years.
Answer: Efficiency signifies a peak level of performance that uses the least amount of inputs to achieve the highest amount of output.
Explanation: It minimizes the waste of resources such as physical materials, energy, and time while accomplishing the desired output.