The van's AVERAGE speed on the way up the hill is
(1/2) (20 + 12) = (1/2) (32) = 16 m/s .
At an average speed of 16 m/s, it travels
(16 m/s) x (8 s) = 128 meters in 8 seconds.
A food handler cannot identify if food has been contaminated with pathogens by its smell, look and taste. The best way to ensure food is pathogen-free is to follow safe food handler’s practices.
Answer:
The acceleration will also double
Explanation:
F = m*a
a = F/m
plugging in sample numbers to prove
a= 100/4 = 25
a = 200/4 = 50
Answer:
B) Blackbody radiation
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An important assumption to solve this problem is that the acceleration is uniform (constant).
Under that assumption you can use following formulae.
Acceleration = [Final velocity - Initial velocity] / time
You have final velocity = 0 and initial velocity = 16 km/h
Then you need to find the time.
Average velocity = [distance / time]
In this case the distance is the deformation of the bumper: 6.2 cm = 0.062 m = 0.000062 km
And when acceleration is constant, the average speed is equal to [Initial velocity + Final velocity] / 2 = [16 km/h + 0] /2 = 8 km/h
Now you can calculate time solving from Average velocity = [distance / time]
time = distance / average velocity = 0.000062 km / 8 km/h = 0.00000775 h
And, finally we can use the formula Acceleration = [Final velocity - Initial velocity] / time
Acceleration = [16 km/h - 0 km/h] / 0.00000775 h = 2,064,516 km/h^2