Answer:Ek=673.109 kJ
Explanation:
Use equation for Kinetic energy: Ek=m*V²/2
m=650 kg (mass of roller coaster)
V=20.0Miles/s=20.0*1.609m/s=32.18m/s
Ek=m*V²/2
Ek=650kg*(32.18m/s)²
Ek=(650kg*1053.55m²/s²)/2
Ek=673 108.8 J
Ek=673.109 kJ
Sounds that have the same pitch and loudness can be differentiated by intensity and tone.
Answer:
Mass and Gravity
Explanation:
Objects with mass exert forces on each other via the force of gravity. This force is proportional to the mass of the two interacting objects and is inversely proportional to the square of the distance between them.
Answer:
A. 100 Watts
B. 12 Watts
C. the first bulb
Explanation:
A. The formula for power is Work done/time
6000J/60seconds = 100J/s or 100W
B. Another formula for power is Current * Voltage
0.05*240 = 12W
