Answer:
68:39
Explanation:
We have to find the ratio of the man's running speed to the sidewalk's speed.
Let running speed of man=x
Sidewalk's speed=y
When man running in the same direction as side walk is moving.
Then, total speed=x+y
Time=2.9 s
When a man running in opposite direction as the side walk is moving.
Then, total speed =x-y
Time =10.7 s
Distance traveled in both cases remain same.
Suppose , d is the distance from one end to another end.
Hence, the ratio of the man's running speed to the sidewalk's speed =68:39
Answer:
Explanation:
Not really sure what you're trying to do. You propagate uncertainties for indirect measurements, as in when you calculate a value from other values.
What you have here is a series of values of direct measurements it seems.
Anyway, for error bars will have a width of 2 times the uncertainty reported.
For example on the first one
373.67 +/- 15.444
You would have an error bar with a width of 2 * 15.444 = 30.888. This bar would be centered at 373.677. The lowest point of the error bar would be at 358.233 and the highest point at 389.121.
You also mentioned a scatter plot, but scatter plots are 2D at least. Are these measurements associated to something else like time? You need 2 coordinates for each point in a scatter plot.
1 year<span> consists of 365 days. 1 day has 24 hours, each hour has 60 minutes and each minute has 60 </span>seconds. <span>1 day = (24 hours/day) × (60 minutes/hour) × (60 seconds/minute) = 86400 seconds/day
Hope that helped :)</span>
Answer:
C. Both technicians A and B
Explanation:
From the physical definition, power is defined as the rate of a body doing work. It is expressed as
P = w/t watts
Where
w - is the work done or the energy of the system in joules
t - time
The unit of power is represented in watts.
Whenever there is a rate of change of energy in the system, it accounts for the efficiency of the power of the system.
Hence, the statements of both technicians are correct.
The correct answer for this question would be option A. When Barry is
conducting an experiment and rolls a tennis ball down a ramp, the
statement that best describes the motion of the tennis ball is that, i<span>t does not exhibit projectile motion and follows a straight path down the ramp. Hope this helps.</span>
