Answer:
P = 1.45 hp or 1.94kW
Explanation:
Given:
v = 2.5m/s
uk = 0.06
m = 60kg
Fk = uk*m*g*fsin(15)
Fk = 0.06*85*9.81*60*sin(15)
Fk = 776.15 N
Power=force*speed
P = F*v
P = 776.15N*2.5m/s
P = 1940.36 W
1 Horsepower = 0.7457 Kilowatts
P = 1.45 hp
Answer:
Iron has a higher heat capacity than copper
Explanation:
The heat capacity of a substance is defined as the amount of heat required to raise the temperature of an object by 1°C.
The higher the heat capacity of a substance, the longer the time it takes for the substance to become hot when heated.
Since the copper rod becomes too hot to hold much sooner than the iron rod, it means that iron has a higher heat capacity than copper.
Answer:
Type of steels and their uses :
Type Carbon percentage uses
Low carbon steel 0.1% to 0.3 % Food cans ,car body ,nut & bolt.
Medium carbon steel 0.3% to 0.70 % Metal chains ,wheel rims,wire ropes
High carbon steel 0.7% to 1.3% Hammers,drills ,dies and taps.
High speed steel 0.6 % Cutting tools in lathe machine.
Type Properties
Low carbon steel - Fairly strong and easily get rusty
Medium carbon steel - Having high hardness than low carbon steel
High carbon steel - Having high hardness than medium carbon steel
High speed steel - Harder ,can retain its shape at high temperature
The flame on a gas stove heats the bottom of a metal pot is conduction.
The sun gives you a sunburn is a radiation
Answer:
The right approach will be Option C "Group 12".
Explanation:
- A table that further arranges the chemical components in addition to expanding the electron configuration. Elements possessing identical characteristics are positioned in almost the same section (column or group), although elements in almost the same row become positioned with a similar amount of electron spheres.
- Group 12 components therefore partially replaced (n − 1)d subshells, and therefore aren't metals, technically accurate. However, although much their chemistry seems to be comparable to something like the components throughout the d block which includes establishing themselves.
Some other options in question are not relevant to something like the given scenario. Because then the option here is just the right one.