According to the American Heart Association, the broad,
approximate guideline for your MAXIMUM heart rate is:
-- take 220
-- subtract your age
The unit is "beats per minute".
But there are many things that have an effect on this number.
A few of them are:
-- your age
-- your weight
-- any medicines you're taking
-- HOW you measure your heart rate.
If you're planning any REGULAR activity that will play with
your heart rate, you really ought to discuss it with your doctor
before you jump in.
Elastic potential energy is given by formula
here we know that
Now using above formula we have
So elastic potential energy in the chord is 14400 J
The question is missing alternatives. Here is the complete question.
An infrared spectrometer on Dawn found something unexpected on Ceres's surface. Its presence suggested that Ceres might have formed farther from the Sun, or been impacted by objects from a more-distant part of the solar system. What was this finding?
1. The fact that Ceres is covered with small dark particles that appear identical to the composition of Uranus's rings.
2. The presence of a thick cloud layer made of sulfuric acid, similar to what is observed at Venus.
3. The presence of clay-like minerals with ammonia bound up in them.
4. The infrared spectrum of Ceres's surface is essentially identical to that of most objects in the Kuiper Belt.
Answer: 3. The presence of clay-like minerals with ammonia bound up in them.
Explanation: The discovery of ammonia clay-like minerals in Ceres is surprising because it would be encoutered in planets that are far from the Sun, since ammonia requires colder temperatures, which is found beyond Jupiter's orbit, to condense. This finding can ascertain not only the origins of the dwarf planet as how the solar system was formed, were organized and evolved, because understanding where smaller planets are formed is important to determine their destiny.
Axis forces -- called this for they positioning on the on the countries made a lined shaped expansion <span />
Speed is a magnitude, a scalar quantity (i.e. 65 mph)
Velocity is a magnitude and direction, a vector quantity (i.e. 65 mph north)
Acceleration is the change in velocity over a unit of time
(1) Different rates of acceleration.
Given for the motorcycle:
Vi = 80 km/h
Vf = 90 km/h
Given for the bicycle
Vi = 0.0 km/h
Vf = 10 km/h
*IF* the time unit is the same (let's say 10 seconds), the actual value is the SAME for each, because the change in velocity was the same for each. 10 km/h over 10 seconds.
a = [ Vf - Vi ] / t
a = [ (90 km/h) - (80 km/h) ] / (360 h)
a = [ 10 km/h ] / (360 h)
a = 0.023 km/h^2
See, same thing, bicycle or motorcycle, change is 10 km/h, over the same time period gives the same value.
Incidentally, you should usually use meters per second (m/s) and seconds (s) not hours and kilometers.
