Answer: B. Only the mass of the planet
Explanation:
the confusion on the concepts of mass and weight arises from the fact that the acceleration due to gravity is more or less constant in any place on the Earth's surface, thus the weight of an object is directly proportional to its mass. hope it helps <3
Answer:
The change in momentum, p = -4.539 kg-m/s
Explanation:
It is given that,
Mass of the ball, m = 0.89 kg
Initial speed of the ball, u = 3.8 m/s
Final speed of the ball, v = -1.3 m/s (as it rebounds)
Let p is the change in linear momentum of the ball. We know that the linear momentum is equal to the product of mass and velocity. It is given by :
p = -4.539 kg-m/s
So, the change in linear momentum of the ball is 4.539 kg-m/s. Hence, this is the required solution.
Answer:
The statement is not written clearly, so possible answer is 7.43KJ
.
Explanation:
- The heat of reaction is basically ΔH at constant pressure and is ΔU at constant volume.
- Since, for any reaction the relation between this heats is given by equation,
ΔH = ΔU + (Δng )RT
where,
Δng
= change in number of gaseous moles in any reaction.
- Since, in the above reaction the only gaseous species are CO2
and O2
, so,
Δng =12−15=−3.
- Hence, using ΔH - ΔU = (Δng
)RT
ΔH - ΔU =(−3)RT=(−3)×8.314×298.15J (T in Kelvin)
=> ΔH - ΔU=7430J=7.43KJ
Answer:
they can live to 9- 15 years
Explanation: