(64 meter/day) x (1 kilometer / 1,000 meters) x (1 day / 24 hours) =
(64 x 1 x 1) / (1,000 x 24) (kilometer/hour) =
1/375 km/hour
(0.002667 km/hour, rounded)
2-2/3 meters/hour
(8-ft 9-inches) per hour
Answer: liain is using lucid mode
Explanation:btw im from canida so sorry if its wrong
It says that the force of a spring is always opposite to the direction in which you stretch it or compress it. (the direction of 'x')
In other words, a spring that's disturbed always tries to put itself back to it's normal length, where x would be zero.
The graph is missing, however we can answer anyway.
In fact, this is the approximate percentage of the elements listed in the questions in the Earth's crust (data taken from wikipedia):
Iron 5.0 %
Calcium 3.6 %
Sodium 2.8 %
Potassium 2.6 %
Magnesium 1.5 %
of all of these, we see that the combination of two elements that makes up the closest number to 7% is calcium and sodium (3.6% + 2.8%=6.4%), therefore the correct answer is
Calcium and sodium.
