jonathanvega424
08.10.2019 •
Physics
Select all the correct definitions
a. mechanical advantage is the ratio of output force/ input force
b. mechanical advantage is the ratio of input/output force
c. efficiency is the ratio of input work/ output work expressed as a percentage
d. efficiency is the ratio of output work/input work expressed as a percentage
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Ответ:
Mechanical advantage: It is ratio of output force and input force.
Efficiency: It is ratio of output work and input work expressed as a percentage.
Option A and D
Explanation:
A mechanical advantage is defined as the ratio of output force to the input force. No units are there for the mechanical advantage. Based on the Law of conversation of energy, the energy cannot be multiplied. Efficiency is being defined as the effect of the device on the output work. It is represented as a percent.
Ответ:
b and d
Explanation:
Ответ:
Alpha radiation is a helium nucleus
Electrons are beta radiation
The order of radioactive particles from most to least penetrating ability is gamma, beta, alpha
Alpha radiations is easily stopped by paper or clothing
Explanation: