Dimensional analysis is a convenient technique to determine if the solution you're following would lead you to the answer that you're looking for. It is the manipulation of units. Like units are cancelled whenever they appear on the numerator and the denominator side. For example, if the speed is 5 m/s and the time is 2 s, the distance would be:
(m/s)*(s) = m
So, you would know that the solution would be 5*2 because it yields the unit for distance.
Hence, dimensional analysis could prevent crash by calculating the right velocities or distances of the two vessels to prevent collision.
Answer:
83.33 m/s^2
Explanation:
Acceleration is defined as the rate of change of velocity.
So if we know that at the beginning an object has a velocity V1.
And after a time T, the object has a velocity V2, then the average acceleration in that time interval can be calculated as:
A = (V2 - V1)/T
In this case, we know that the initial speed was 5,000 m/s
And after a time of 60 s, the velocity is 10,000 m/s
Then we have:
V1 = 5,000 m/s
T = 60s
V2 = 10,000 m/s
Then the average acceleration is:
A = (10,000 m/s - 5,000 m/s)/60s = 83.33 m/s^2
Answer:
129.453 kJ is required to heat 0.850 pints of water
Explanation:
1 pint requires 36400 cal of energy to heat a pint of water from room temperature to boil.
Sometimes he uses 0.850 pints. The energy he needs then : 36400 * 0.85 = 30940 cal
Since we know that 1 cal = 4.184 J
⇒ 1 cal = 4.184J so 30940 cal =4.184 * 30940 = 129452.96 J = 129.453 kJ
So 0.850 pints of water require 129.453 kJ, at roomtemperature.
Answer:
Genetic inheritance occurs due to genetic material, in the form of DNA, being passed from parents to their offspring. When organisms reproduce, all the information for growth, survival, and reproduction for the next generation is found in the DNA passed down from the parent generation.
Explanation:
Hoped its helped