Answer:
<em>Only gravity acts on B but there is an additional residual force from the hand on A.</em>
Explanation:
All bodies are constantly under the effect of gravity. Gravity is what gives us weight here on earth. Gravity acts downwards, and helps to decrease the deceleration of a body moving up and accelerating a body that travels downwards. For the ball A, traveling upwards, the upwards movement is due to the force on it impacted on it from the hand. As A tries to go up, gravity tries to decelerate it until it will come to a stop and then fall downwards under gravity. For body B, descending down means that only gravity forces acts on it at that point, if we ignore buoyant forces and air resistance. And B accelerates as it falls down towards the juggler.
Answer:
C. precipitation
Explanation:
if clouds store too much water from evaporation, it will rain which is precipitation
Answer:
Heat capacity this bomb calorimeter =
Explanation:
Given data we have in the question:
The heat of combustion for the benzene, (Here the negative sign depicts the release of heat and only magnitude is considered fro the heat capacity)
The mass of benzene,
The change in temperature due to the combustion,
Now, the formula for the heat capacity is given as:
Heat capacity (C) =
or
C =
or
C =
Answer:
Power = 1625 Watts
Explanation:
Given the following data;
Energy = 65,000 J
Time = 40secs
To find the power;
Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
Substituting into the equation, we have
Power = 65,000/40
Power = 1625 Watts
Answer:
A
Explanation:
Correct option is A)
We know that pressure of a gas is inversely proportional to its volume (Boyle's Law). So, one of the gas equations can be written as-
P 1
V 1 =P 2
V 2 , where P 1 and V 1
are the initial conditions of pressure and v olume of a gas. And P 2 and V 2 are the final conditions of pressure and volume of the gas.
In the question given, P 1 is 5atm. The value of V 1 IS 25L. The final pressure is unknown and let it be P 2
, whereas, the final volume is reduced to 5L. Putting all these values in the above mentioned equation we get,
P 1 V 1
=P 2 V 2 Or, 5×5=P 2
×5 Or P 2 = 5
125
P 2
= 25 atm.