Answer:
c) 3176 J
Explanation:
mass of 125 popcorn = 125 x .0001 = . 0125 kg
increase in temperature = 175 - 21 = 154°C
specific heat of popcorn = 1650
heat required to increase temperature
= mass of popcorn x increase in temperature x specific heat
= .0125 x 154 x 1650
= 3176.25 J
'Newton-second' is dimensionally equivalent to 'kilogram-meter/second'.
Answer:
Explanation:
We shall apply here Doppler's effect in optics . The formula is as follows
Δλ is change in wavelength , λ is original wavelength , v is velocity and c is velocity of light
Δλ = 685 - 590 = 95 nm
λ = 685
95 / 685 = v / 3 x 10⁸
v = .416 x 10⁸ m / s
= 4.16 x 10⁷ m /s
We have that the speed over the ground of a mosquito flying 2 m/s relative to the air against a 2 m/s headwind is
X=0m/s
From the question we are told that
mosquito flying 2 m/s
against a 2 m/s headwind
Generally
The speed over the ground is the Flight Speed minus resistance speed
Generally the equation for the speed over the ground is mathematically given as
X=Flight Speed-resistance speed
Therefore
X=2-2
X=0m/s
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