Question 2 Cars A and B are travelling in adjacent lanes along a straight road. At time, t = 0 their positions
and speeds are as shown in the diagram. If car A has a constant acceleration of 0.6 m/s2 and car
B has a constant deceleration of 0.46 m/s2, determine when A will overtake B.
(VA)o = 13 ms -1
A
(VB). = 20 ms?
B
30 m
Question 3
Position vs. time graph of a car is given below. Sketch a graph of velocity versus time and a
graph of acceleration versus time corresponding to the graph of displacement versus time given
in the graph.
x (m)​

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.