A and C because stronger attractions means it needs more energy to break them so a higher temperature is needed
<span>C) It does not change. At the point where the phase of a substance changes, there is no temperature change but only the phase change. After this, the temperature then goes up or down depending on the type of phase change occurring. </span>
D is the answer
To get the density you divide mass by volume
So the equation is 400/60=d
Answer:
45.13 beats/min
Explanation:
Speed of space vehicle = 0.51c
the pulse rate measured by the astronaut= 61.0 beats per minute
Pulse rate measured by the Earth observer is given by

putting vales we get

= 45.13 beats/min