Answer:
A. using a weak hydrochloric acid solution and whole pieces of chalk
Explanation:
The higher the concentration, and the greater the surface area, the faster the reaction.
Therefore, a weak acid with whole pieces of chalk is going to have the slowest rate.
Answer:
Enhanced Green house effect
Explanation:
The paradox describes the inconsistency between the faint young Sun and the temperate climate on the early Earth. Despite low radiation by the sun of the early year, the Earth still maintained a temperate climate.
This paradox can be resolved by instigating changes in the atmospheric concentrations of greenhouse gases like ammonia (NH3), CH4, or CO2. This is referred to as enhanced green house effect.
Answer:
lighter atoms, energy, neutrons.
Explanation:
An atom is divided into two lighter atoms when passing through a nuclear fission. This process also generates some neutrons and a release of energy, that is, the kinetic energy of the nucleus and gamma rays. Therefore, the two resulting nuclei are called fission products.
26.676 × 10³ kg is the weight of the aluminum rod.
<h3>To calculate specific weight:</h3>
Given:
Length of cylindrical rod (h) = 45 cm
Diameter of a cylindrical rod = 4.53 cm
Radius of a cylindrical rod (r) = 2.3 cm
The density = 3.7*10^3kg/m^3
Volume of a cylindrical rod = πr²h
= 3.14× (2.3)² × 45
= 747.89 cm
= 7.4789 m
To find weight ;
ρ = ; ρ = Density
Mass = ρ × Volume
= 3.7 × 7.48 × 10³
=27.676 × 10³ kg
Therefore, the weight of the aluminum rod is 27.676 × 10³ kg.
Learn more about specific weight here:
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The answer is d. Unitary elastic demand means that elastic coefficient=1. In other words, a change in the price of a good causes an equal change in the quantity of demand. The price-demand graph should be an inverse function, where the product of x, y coordinates at any point is constant.