Answer:
true
Explanation:
Initially it requires more force to break the interlock between the irregularities of two surfaces. But once the block is in motion, it takes time to interlock between the irregularities of two surfaces. Also, the body gains the inertia of motion.
A, emits light. Go to a shop with a neon light, it'll always glow (the light, not the shop)
Answer:
1.8 × 10^29 kg
Explanation:
The computation of the total mass is shown below;
As we know that
The total mass of the sun is
= 2 × 10^30 kg
Since 70% of the mass involves hydrogen gas, so total mass of the hydrogen gas is
= 70% × 2 × 10^30 kg
= 1.4 × 10^30 kg
And, 13% available for fusion, so the hydrogen gas mass is
= 13% × 1.4 × 10^30 kg
= 1.8 × 10^29 kg
Density = (mass) / (volume) <=== <u>Memorize this</u> !
Mass = 6 g
Volume = 12 mL
Density = (6 g) / (12 mL)
Density = (6/12) (g/mL)
1 mL is the same volume as 1 cm³
<em>Density = 0.5 g/cm³</em>
Answer:
b.
c.
e.
h.
Explanation:
If we consider the ball,the tension is not balance by weight then the force acting will be non zero.It means that train car in not inertial frame of reference.And the same time the train car must accelerated with respected to the earth.It is not moving straight path.When train is in rest position but the string will be at the constant angle.
So the following option are correct:
b.
c.
e.
h.