Answer:
It depends on the mass of each of the bodies, and the distance that separates them.
Explanation:
The force of attraction between two objects depends on the mass of each of the bodies as well as the distance that separates them. This force can be easily calculated by means of the universal gravitation law formulated by Newton.
Next, we will see the equation that explains the law of universal gravitation.
Dynamic equilibrium is a state in which the net external force and torque on a system moving with constant velocity is zero.
A force of 20 N is applied to a block.
The magnitude and direction of the frictional force is:
B ) 20 Newtons opposite the direction of the applied force.
50 g = 0.5 kg. a = 5 / 0.5 = 10 m/s^2.
An energy of 25kJ is given out hence the reaction is exothermic.
<h3>What is a reaction?</h3>
Chemical reaction is said to occur when reactants combine leading to the formation of products. In a plot of the energy against the reaction profile, the topmost point of the graph is called the activation energy.
We know that a reaction is exothermic when reactants posses more energy than the products. Hence the enthalpy change for this reaction is;
ΔH = 5kJ - 30kJ = -25kJ thus the reaction is an exothermic reaction.
Now, the activation energy for the lighting of the match stick is high that is why a spark is required before the reaction gets underway. Heat is evolved in the process hence the reaction is exothermic. The energy of the reactants is greater than the energy of the products.
Learn more about exothermic reaction:brainly.com/question/10373907
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