Answer:
Explanation:
we know that 1 km =1000 m and 1 hour =60 min
therefore
239 km/hr =239*1000m/60 min=3983.3 m/min
Answer:
The answer to the question is
The resultant ground reaction force exerted by the floor on the volleyball player's shoes = 2088.06 N
Explanation:
To solve the queston we list out the variables thus
Mass of volley ball player = 80 kg
Normal force exerted on her shoes by the floor N =2000 N
friction force, f, exerted on her shoes backwards = 600 N
The resultant ground reactive force, R, is given by
R² = N² + f² = 2000² + 600² = 4000000 + 360000 = 4360000
Therefore R = √(4360000) = 2088.06 N
The direction of the force = atan (2000/600) = 73.3 ° clocwise or 106.699 ° counter clockwise
In order to find the number of moles in a sample we are tasked with first finding the number of moles in that sample. This is because the moles in a substance indicates the amount of the substance that contains the same number of particles as 12 g of the Carbon-12 isotope [or equivalent to 6.02 × 10²³ (which is used as a standard in the world of moles).
Now,
If moles = mass ÷ molar mass
then mol of aluminum = 100 g ÷ 27g/mol
= 3.704 mol
Now that you have calculated the moles then you can do a simple ratio and multiplication at arrive at the number of atoms that would be present in the 100 g of aluminum.
if 1 mol of aluminum contains 6.02 × 10²³ atoms
then let 3.704 mol of aluminum contain x
∴ x = 3.704 mol × (6.02 × 10²³)
= 2.23 × 10²⁴
∴ 100 g of Al would contain ~ 2.23 × 10²⁴ atoms
Potassium Sulfate = K₂SO4
SO4 = negative 2, so you need 2 K+ ions to counteract it, hence K₂
Answer:
D. Individual N would have done less work because the object was moved a shorter distance
Explanation:
When a body is moved a given distance (x) by a specific force (F), the work done on the body is equivalent to F*x. This shows that work is proportional to the applied force and the distance traveled by the body. Therefore, the higher the distance the higher the work done and the lower the distance the lower the work done. The work done by Individual N is lower due to the shorter limbs that correspond to shorter distance.