Answer:
When acceleration is zero (that is, a = dv/dt = 0), rate of change of velocity is zero. That is, acceleration is zero when the velocity of the object is constant. so probably D
Explanation:
D
Answer: The answer is electricity and magnetism.
Explanation: The atom's center, or nucleus, is positively charged and the electrons that whirl around this nucleus are negatively charged, so they attract each other. The reason the force is strong is because the atom is so small.
Answer:
121550 J
Explanation:
Parameters given:
Mass, m = 0.34kg
Specific heat capacity, c = 14300 J/kgK
Change in temperature, ΔT = 25K
Heat gained/lost by an object is given as:
Q = mcΔT
Since ΔT is positive in this case and also because we're told that heat was transferred to the hydrogen sample, the hydrogen sample gained heat. Therefore, Q:
Q = 0.34 * 14300 * 25
Q = 121550J or 121.55 kJ
Answer:
Correct answer:
As the temperature increases, the kinetic energy of the molecules increases.
Explanation:
The relation between kinetic energy and temperature in an ideal gas which we will take as an example is given by the following formula:
Ek = 3/2 N k T ,
where N is the total number of molecules a k is a Boltzmann constant.
If we assume that the total number of molecules is a constant, kinetic energy only depends on temperature.
God is with you!!!
Answer:
kinetic energy because when the car moves again it will be faster then it was before