How do collisions between molecules transfer energy from a system of reacting substances to its surroundings?
O A. They cause the thermal energy of the surroundings to decrease.
O B. They cause molecules to flow into the system from the
surroundings.
C. They cause heat to flow from the system to the surroundings.
O D. They cause the potential energy of the system to increase.

harry byrd declared organized resistance by southern states would prevent racial integration.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min