Answer:
Weight = 6.919 n
Buoyant force = 4.397 N
Apparent weight = 2.522 N
Explanation:
radius, r = 0.0199 m
density of platinum = 2.14 x 1064 kg/m^3
density of mercury = 1.36 x 1064 kg/m^3
Weight of sphere= volume of sphere x density of platinum x g
= 4/3 x 3.14 x (0.0199)^3 x 2.14 x 10^4 x 9.8 = 6.919 N
Buoyant force acting on sphere = Volume of sphere x density of mercury x g
= 4/3 x 3.14 x (0.0199)^3 x 1.36 x 10^4 x 9.8 = 4.397 N
Apparent weight = True weight - Buoyant force = 6.919 - 4.397 = 2.522 N
<span>The oven will transform electrical energy into heat energy</span>
Answer:
Having a planner gives students freedom to plan, organize and keep track of their work to the best of their abilities and requirements. This has a dual benefit in that it increases the student's accountability to the commitments planned as well as provides them with a structure that contributes to their success.
Explanation:
Answer:
Option B: the period during which a solid is not changing state; its temperature is increasing
Explanation:
The temperature is defined as a measurement of the speed at which particles of matter are moving (their kinetic energy)
Therefore for an increase of kinetic energy to take place, and increase of temperature has to occur.
Answer:
option B
Explanation:
given,
toy car is moving in circular track
speed is doubled— a change of a factor of 2
to find change in factor of acceleration
radius doesn't change
centripetal acceleration formula
= 
velocity is change in factor of 2
so acceleration will be change at the factor of
= 
= 2² = 4
so the correct answer is option B
