The correct answer is C. Its speed
Speed is related to the kinetic energy, not the potential one because kinetic requires the body to be in motion, that is, move at a certain speed. Potential energy has no motion.
The formula for average speed is S=D/T
1. S=72m/37s
Divide
S= 1.94
Kira's average speed is 1.94m/s.
2. S=7.5km / 1.5h
S=5
Your average speed is 5km/h
3. S=1260km/3.5h
S=360
The airplanes average speed is 360km/h
Answer:
Estimate money spent on the appliance( 9 Watt bulb ) on a monthly basis is $0.7776
Explanation:
Given the data in the question;
we are to pick a small appliance in our home that we use regularly and look up on the internet how much power it operates at;
so lets consider a 9 Watt bulb
Power p = 9 Watt
Household Voltage = 120 v
we know that; Power = Current I × Voltage V
so,
9 = I × 120
I = 9 / 120
I = 0.075 A
Resistance;
R = V / I
R = 120 / 0.075
R = 1600 Ω
Now, Energy consumed in 1 month(30 days) will be;
E = P × Τ
E = ( 9 / 1000kW ) × ( 30 × 24hrs )
E = 0.009 × 720 hrs
E = 6.48 kWh
Now, the cost for one month will be;
Cost = 6.48 × $0.12
Cost = $0.7776
Therefore, estimate money spent on the appliance( 9 Watt bulb ) on a monthly basis is $0.7776
Then the speed of the rider is, v = 2m/s
The linear velocity of an object in a straight line is its speed.
The following is the relationship between linear and angular velocity:
v = rω
The circumference of the bicycle wheel is,
2r = 2
r = 0.318m
The angular velocity of the wheel is,
ω = 1rev/sec = 2rad/s
Then the speed of the rider is,
v = rω
v = 0.318×2π
v = 2m/s
Learn more about angular velocity here:
brainly.com/question/12446100
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