Answer:
Friction force always acts tangent to the surface at points of contact. Friction force acts opposite to the direction of motion. There are 2 types of friction: Static friction: If the two surfaces in contact do not move relative to each other, one has static friction.
Answer: B.) High specific heat capacity
Explanation:
Thermal insulators are materials that are bad conductors of thermal energy.
On the other hand, the <u>specific heat capacity</u> of a material is defined as t<em>he amount of heat needed to raise the temperature of 1 kg of the material by 1K.
</em>
So:
If a material has a low specific heat capacity, it means that it takes a short time to absorb the heat, hence a temperature increase occurs shortly. These are excellent thermal conductors.
But if a material has high specific heat capacity, it will take longer to absorb heat and is therefore an excellent thermal insulator.
Answer:
This is important because in the case of the potassium atom, the outermost electrons will be attracted by the nucleus more. In other words, K+ has bigger effective nuclear charge than Cl− , which translates to a bigger net positive charge felt by the outermost electrons.
Explanation:
Answer:
F=ma
dv/dt= a
a is referred to as acceleration
Answer:
Explanation: The periodic table contains rows and columns. To find how many valence electrons are in an element, simply locate the column number that it is in, and that determines the number of valence electrons in an element. This rule works only for elements excluding the transition metals
Explanation:
