Answer: There is two (PO4) in the formula
Explanation:
Just be aware of the difference between numbers to the right and left: 5Mg3 means there are a total of 5 Mg (if 3 is a number in the bottom left) the 3 in (PO4) means there are 3 PO4 but because of the 2 it could mean there are 6.
Depends if the elements are separated
Answer:1834.56 joules
Explanation:
Distance=36m
Coefficient of friction=0.2
Mass=26kg
Acceleration due to gravity=9.8m/s^2
Reaction=mass x acceleration due to gravity
Reaction=26 x 9.8
Reaction=254.8N
Coefficient of friction=frictional force ➗ reaction
0.2=frictional force ➗ 254.8
Frictional force=0.2 x 254.8
Frictional force=50.96N
work=friction force x distance
Work=50.96 x 36
Work=1834.56
Work=1834.56 joules
The wind tunnel speed that must be used to test the car 1 / 5 model of a car that normally runs at 30 mph is 150 mph
Re = u L / ν
Re = Reynold's number
u = Flow speed
L = Characteristic linear dimension
ν = Kinematic viscosity
ν
= 1.516 * 
m² / s
ν = ν
= 1.516 * m² / s
L = L / 5
u = 30 mph
Re = u L / 5 * 1.516 *
Re = 30 L / 1.516 *
In tunnel,
Re = Re
u L / 5 * 1.516 * = 30 L / 5 * 1.516 *
u = 30 * 5
u = 150 mph
Therefore, the wind tunnel speed that must be used to test the car is 150 mph
To know more about Reynold's number
brainly.com/question/12977616
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Answer:
The answer is (d) I promise i'm not lying I just checked on my test
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Explanation:
Measurements of microtremors, slope of the land, and motion of tectonic plates predict earthquakes. But we can't predict WHEN accurately enough yet to make the prediction useful to the general public.
