4. If the freezer removed 37.5 cal of heat from a cup of coffee at 90 C to cool

Question

4. If the freezer removed 37.5 cal of heat from a cup of coffee at 90 C to cool it to 89.3°C, what is the mass of the coffee? (Ceofe 1.Ocal /gCo) (15 points) 5. Sound from the siren of an emergency vehicle has a frequency of 750.0Hz and moves with a velocity of 343.0 m/s. what is the wavelength of the sound? (15 points) 6. A 14.53 kg loose bag of soil falls 6.50 m at a construction site. If all the energy is retained by the soil in the bag, how much will its temperature in crease? ol 198.0cal I kgC°) (25 points)

Explanation / Answer

Problem 4)

Heat is given by,

Q = m C (T2 - T1)

37.5 cal = m x 1 x (90-89.3)

m= 53.57 g.

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According to Chegg guidelines We can solve one problem at a time, please reattach your other problems seperately

Comment in case any doubt.. Goodluck

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