Answer;
The above statement is True
Kinetic friction is affected by the weight of the object.
<h3><u>Explanation;</u></h3>
- Kinetic friction is a force that acts between moving surfaces. An object that is in motion over a surface experiences a force in the opposite direction to the direction of movement.
- The equation for kinetic friction is given by the formula;
F= coefficient of friction * Normal force.
- Normal force is the force of the table pushing back on the block and can be calculated by formula;
F = mass* acceleration due to gravity.
- Therefore, the weight of an object determines its kinetic friction.
Its A The paper clip is repelled away from the nail because an electromagnetic field magnetized to the nail
Answer:
ΔV=0.484mV
Explanation:
The potential difference across the end of conductor that obeys Ohms law:
ΔV=IR
Where I is current
R is resistance
The resistance of a cylindrical conductor is related to its resistivity p,Length L and cross section area A
R=(pL)/A
Given data
Length L=3.87 cm =0.0387m
Diameter d=2.11 cm =0.0211 m
Current I=165 A
Resistivity of aluminum p=2.65×10⁻⁸ ohms
So
ΔV=IR
ΔV=0.484mV
You have said that 15cm³ of gold weighs 2.8N. So I may infer that each cm³
of gold weighs about 0.19N. When I compare that figure with the 0.13N per cm³
of mercury, it becomes immediately apparent that the gold is more dense than
mercury. Therefore, the sample of gold, no matter what its size or weight, will
displace its total volume of mercury, and will go on to sink entirely beneath the
waves in the mercury.
