The time the package travels horizontally is equal to the time it takes to hit the ground. This can be calculated using:
s = ut + 1/2 at²; u is 0
480 = 4.9t²
t = 9.90 seconds
Horizontal distance = horizontal speed x time
The speed will be converted to m/s from km/h
= 180 km/hr x 1000m/km x 1hr/3600 seconds x 9.90 seconds
= 495 m
Answer: 0.58 s
Explanation: Solution attached:
Convert first 100.0 km/h to m/s
100.0 km/h x ( 1000 m / 1 km ) x ( 1h / 3600s ) + 27.8 m/s
Use v= d / t and derive too find t:
t = d / v
= 16 m / 27.8 m/s
= 0.58 s
cancel out meters and the remaining unit is in seconds.
Answer: approximately 0.0556atoms of 14C
Explanation:
Since 1000atoms of 14C was presently found in the atom that was created 18000years ago. The number of atoms of 14C that will be in that object when it was made will be 1000/18000 which is 0.0556atoms of 14C.
Note that the number of atoms present in it 18000years ago will be a way smaller than present atoms of 14C in it
If two forces "balance" each other, that means that they add up to zero.
THAT means that they must have exactly equal magnitudes and exactly opposite directions.
If you want to draw a picture of a pair of two balanced force vectors . . . .
1). Draw two arrows with exactly the same length.
2). Flip one of them over, so that it points in exactly the opposite direction compared to the first one.
3). Place them tail-to-tail.