Answer:
None of these is correct.
Explanation:
The average speed can be derived from the sum of the total distance traveled and the total time taken.
Total distance = 4.9 + 1.9 = 6.8
Total time taken = 33 + 39 = 72
So;
Average speed = = = 0.014
None of the answer choices given is correct.
Answer:
They create enormous amounts of sound energy, much like explosion. When an aircraft passes through air, it creates a series of pressure waves just like the waves created by the boat. As the speed of aircraft increases these waves are forced to compress.
Answer:
Explanation:
The simplest circuit has the battery in series with the resistor
V = IR
I = V/R = 1.5 / 15 = 0.10 Amps
It could be 1.5 / 150 = 0.01 A depending on how one assumes an error or not in "150hm"
Answer:
17m/s
Step by step explanation:
Using g= 10m/s²
Maximum H = (u²sin²theta) /2g
12 = u² sin²(45)/2(10)
12 = u²(0.72)/20
0.72 u²= 240
u² = 240/0.72 = 333.33
Initial velocity = 18.3m/s
The right answer is B, that kind of current is called also AC and you can look at the power supply module of your phone or computer - there will be an information about types of transformed currents, one of them is AC.