Answer:
115.6 J
Explanation:
= mass of the block = 3.7 kg
= final speed of the block = 0 ms⁻¹
= initial speed of the block = 7.9 ms⁻¹
= work done on the block
Using work done - change in kinetic energy theorem, we have
Answer:
t = 2.26 10⁵ s
Explanation:
Let's calculate the flow of water that comes out of the hose
Q = A v
The area of a circle is
A = π r²
Q = π r² v
Let's reduce the units to the SI system
d = 5/8 in (2.54 10⁻² m / in) = 1.5875 10⁻² m
r = d / 2 = 0.79375 10⁻² m
Q = π (0.79375 10⁻²)² 0.59
Q = 1.1678 10⁻⁴ m³ / s
Let's calculate the volume of the pool
V = π R² h
V = π (4.6 / 2)² 1.6
V = 26.59 m³
Let's use a rule of proportions (rule of three), to find the time
t = 26.59 (1 / 1.1678 10⁻⁴)
t = 22.77 10⁴ s
t = 2.26 10⁵ s
The answer is B. I don’t think I need to explain this,
Mean is average, Mode is the most common number, and Median is the middle number when you put the numbers is numerical order from least to greatest
I don't see any answers, but I do know that machines help for example: make chocolate bars. people do not have to cut the bars or another example: salt or season chips. or washing laundry. or electric cutters help so we do not have to do it by hand or with a knife.
Does this Help?
<span>The volume of a cube is given by s^3. So the volume of this block is 3cm x 3cm x3 cm = 27 cm^3. density = mass/volume =27 g / 27 cm^3 = 1 g/cm^3.</span>