Answer:
C Volume
Explanation:
You would use a graduated cylinder with liquid in it to see how much is displaced when the object is placed in it to determine the volume of the object
Answer:
Kinetic energy,
Explanation:
It is given that,
Mass of ball, m = 0.9 kg
It is dropped form a height of 7 m, h = 7 m
When the ball is at certain height it will have only potential energy. As it hits the ground, its potential energy gets converted to kinetic energy as per the law of conservation of energy.
So,
So, the kinetic energy when it hits the ground is 61.74 Joules.
Answer: heat flows from the hot water to cold water
Explanation:
Heat transfer is taken place from higher temperature to lower temperature then hot water gives heat to the cold water. There are three methods of conduction , Those are Conduction , Convection and Radiation here the heat transfer is taken place from convection.
Answer:
We can identify easily which block has more density, if we try to lift each one, and the heavier will be the one with more density. In this case the block of iron will be the one with more density.
Explanation:
To understand this we will give some numerical values to give the best explanation of this situation.
Let's say that we have the two blocks over one table, and over the table there is a special scale to measure the mass of an object.
Both block have the same dimensions, and seaching information of density by internet we find that the density for the iron is 7850 [kg/m^3], and the density for the aluminum is 2712 [kg/m^3]
Now the dimension of each bloack are 10*10*10 [cm] so, the volume will be 1000 [cm^3] = 0.001[m^3]
Now using the expression of density:
for the iron
for the aluminum
Therefore the weight of the iron will be always almost 3 times heavier than the weight of the aluminum.