Answer:
The hot coffee has a higher temperature, but not a greater internal energy. Although the iceberg has less internal energy per mass, its enormously greater mass gives it a greater total energy than that in the small cup of coffee.
Explanation:
Answer: The correct answer is "the same as the sum".
Explanation:
The expression for the equivalent resistance in the series combination of the circuit is as follows;
Here, R' is the equivalent resistance, are the resistances.
The expression for the equivalent resistance in the parallel combination of the circuit is as follows;
Here, R' is the equivalent resistance, are the resistances.
In the series combination of the circuit, the equivalent resistance is more than the equivalent resistance in the parallel combination of the circuit.
In the series combination of the circuit, the same amount of current flows across the resistance but the voltage is different across the resistances.
Therefore, for resistor in series, the equivalent resistance is the same as the sum.
Force of gravity on an object is the weight of the object and is given by mass times accerelation due to gravity. The accerelation due to gravity is the accerelation of an object in free fall and is given by 9.8m/s^2. Given that the force of gravity acting on a child's mass on earth is 490 newtns, i.e. F = mg which means that 490 newtons = 9.8 times mass. Therefore, mass of the child is 490 / 9.8 = 50 kg.
Answer:
Explanation:
Reaction force of inclined surface
R = mgcos30
=60 x 9.8 x .866
= 509 N
Force of kinetic friction
= .12 x 509
= 61.08 N
b )
net force downwards = mgsinθ - μmgcosθ
acceleration = g sinθ - μgcosθ
9.8 sin30 - .12 x 9.8 x cos30
= 4.9 - 1.018
a= 3.88 m /s²
c )
v² = 2as
= 2 x 3.88 x 20
v = 12.46 m /s
That's law of conservation of mass..
the original log changes its form of mass that ash but the total mass of the system remains constant that's the law of conservation of mass