Answer:
0.17887 kgm⁻³
Explanation:
We know,
p = m/V
Here,
p = density
m=mass =0.00254 kg.
v = volume =0.0142m³
Now,
p = 0.00254 kg/0.0142m³
=
∴The density of helium 0.17887 kgm⁻³
Answer:
I believe your answer would be B. point y
<span>The gain in potential energy is 600*2 = 1200 J, and this is the minimum required work that would be required in a frictionless situation. The work that actually has to be done is F*X = 300*5 = 1500 J. The efficiency is therefore 1200/1500 = 80%</span>
Answer:
9.52 cm
Explanation:
Height of tree that is height of object O =3.40 cm
Height of image that is I =1.60 cm
We know that magnification negative sign for the inverted image
We also know that
u=29.78 cm
Now for concave mirror
f=9.52 cm