Explanation:
A student solving for the acceleration of an object has applied appropriate physics principles and obtained the expression as :
.............(!)
Where
m = 7 kg
We need to find the value of a from equation (1). On solving we get :
Hence, this is the required solution.
Answer:
False
Explanation:
In miles per hour, light speed is about 670,616,629 mph
Answer:
Give person above me brainliest
Explanation:
Answer:82. Since you have a distance and a force, then the easiest principle to use is energy, i.e. work.
The work done by friction is F * d. This work cancels out the kinetic energy of the stone (1/2)mv^2
Fd = (1/2)mv^2
F = (1/2)mv^2/d.
Plug in m = 20 kg, v = 3 m/sec, d = 40 m.
83. With more mass, the kinetic energy is higher now. The work needed is higher. W = F * d and F is the same.
Explanation:Hope I helped :)
Wrong subject. Expect that to be in chemistry.
Here it is:
One mole of a compound/element contains the weight in grams equal to the sum of the molecular mass.
For MgCL2,
Mg=24.30
Cl=35.45
so the molecular mass = 24.30+2*35.45=24.30+70.9=95.20 (approximately).
=>
One mole of MgCl2 weighs 95.20 g.
305 g of MgCl2 = 305/95.20 = 3.20 moles, to 3 significant figures
Edit: improved accuracy of atomic masses.