Answer:
I would say: D.
Explanation:
["Frequency is the number of times an object vibrates in 1 second; frequency is also measured in hertz and is recognized by your ears as differences in pitch."] Frequency is how many times an object vibrates in ONE second. So that knocks the answer down to either A or B. Frequency itself is also measured in hertz, which knocks the answer to: D. hertz per second.
Answer:
2480$
Explanation:
2000$*(3%=0.03)=60$
multiply by 8 = 480$
then by adding it to 2000 = 2480$
Answer:
Q = 1.44×10⁴ J
Explanation:
Given data:
Mass of water = 62.5 g
Initial temperature = 25.5°C
Final temperature = 80.7°C
Specific heat capacity of water = 4.184 J/g.K
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 80.7°C - 25.5°C
ΔT = 55.2 °C
Q = 62.5 g × 4.184 J/g.°C × 55.2 °C
Q = 14434.8 J
Q = 1.44×10⁴ J