Answer:
The value of the power is
Explanation:
From the question we are told that
The power rating
The frequency is
The frequency at which the sound intensity decreases
The decrease in intensity is by
Generally the initial intensity of the speaker is mathematically represented as
Generally the intensity of the speaker after it has been decreased is
So
=>
=>
=>
=>
=>
taking atilog of both sides
=>
=>
=>
Answer:
endothermic reactions
Explanation:
An instant cold pack is a device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it dissolves the solid in an endothermic reaction.
Answer:
1275.61° C
Explanation:
The resistance of a conductor varies as a function of temperature and it is given as follows
R_0 is the resistance at temperature T_0, R is the resistance at T and α is the coefficient of temperature of resistance
α= 0.0045/°C
R_0 = 20.3Ω T_0 = 20°C and R= 135Ω
T= 1275.61° C
Therefore the temperature of the hot filament = 1275.61° C
Answer:
4 hydrogen atoms can form chemical bond with 1 carbon atom.
Explanation:
CH4. methane