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2 years ago

Help someone :(((((((((((((((

Physics

2 answers:

d1i1m1o1n [39]2 years ago

6 0

Answer:

Explanation:

3500Hz*2.5m=9800m/s

Give Brillienst please!!!!

Dimas [21]2 years ago

3 0

Wave Speed (M/s) = Frequency (Hz) x Wavelength (M)

Wave Speed = 3500Hz x 2.8M = 9800M/s

Answer = Top one

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the specific heat of water is 4.2 j/c. if it takes 31,500 joules to heat to warm 750 g of water, what was the temperature change

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The amount of heat needed to increase the temperature of a substance by $\Delta T$ is given by
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In our problem, the mass of the water is m=750 g, the specific heat is $C_s = 4.2 J/g ^{\circ}C$ and the amount of heat supplied is $Q=31500 J$ , so if we re-arrange the previous formula we find the increase in temperature of the water:
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b) Second, now that we know final speed we use $v_{f} =v_{i}-gt$ , as we clear for $t=\frac{v_{i}-v_{f} }{g}=\frac{20.0m/s}{9.8m/s^{2} }=1.32 s$ .

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