If the heat change of the surroundings (such as the solution the reaction is occurring in) is determined to be 2.7 kJ, what is the heat change of the reaction (qrxn)?
Answer: First of all we can conclude that this is an exothermic reaction. The reason being that an exothermic reaction is one that produces a temperature increase in a isolated system giving off heat to the surroundings. Therefore the heat of the reaction is a negative quantity (qrxn < 0).
I hope it helps, Regards.
Answer:
The approximate terminal velocity of a sky diver before the parachute opens is 320 km/h.
Explanation:
- The terminal velocity is the maximum magnitude of velocity that is attained by the diver when he or she falls in the air.
- The terminal velocity of the person diving in air before opening parachute is 320 km/h that means the velocity when the person is experiencing free fall is 320 km/h.
- During terminal velocity, we can represent mathematical equation as;
Buoyancy force + drag force = Gravity
Answer:
0.25 kg
Explanation:
Newton's second law states that:
![F=ma](https://tex.z-dn.net/?f=F%3Dma)
where
F is the net force acting on an object
m is the object's mass
a is its acceleration
In this problem, we have:
is the force exerted on the object
m is the ball's mass
is its acceleration
Solving the formula for m, we can find the ball's mass:
![m=\frac{F}{a}=\frac{0.5 N}{2.0 m/s^2}=0.25 kg](https://tex.z-dn.net/?f=m%3D%5Cfrac%7BF%7D%7Ba%7D%3D%5Cfrac%7B0.5%20N%7D%7B2.0%20m%2Fs%5E2%7D%3D0.25%20kg)
Answer:
A law stating that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them.