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
Answer: Greater then 1000 N.
Explanation: Due to Newton's Third law, (For every reaction, there is an equal and opposite reaction) there must be an opposite reaction for the baseball to bounce off the bat, and it has to be greater than 1000 N.
Answer:
12N S
Explanation:
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Answer:
Describe how the shape of the coast may influence an incoming wave. Explain using key terms such as reflection off the shape of the coast and reflection of incoming waves.
Explanation:
Describe how the shape of the coast may influence an incoming wave. Explain using key terms such as reflection off the shape of the coast and reflection of incoming waves.
Answer:
8.25 x 10^-3 V/m
Explanation:
Resistivity, ρ = 2.44 x 10^-8 Ohm m, Diameter = 1.8 mm
radius, r = 0.9 mm = 0.9 x 10^-3 m, l = 40 cm = 0.4 m, i = 860 mA = 0.86 A,
Let V be the potential difference and E be the electric field.
Use the formula for resistance
R = ρ l / A
R = (2.44 x 10^-8 x 0.4) / ( 3.14 x 0.9 x 0.9 x 10^-6)
R = 3.84 x 10^-3 ohm
According to Ohm's law
V = i x R
V = 0.860 x 3.84 x 10^-3 Volt = 3.3 x 10^-3 Volt
E = V / l = 3.3 x 10^-3 / 0.4 = 8.25 x 10^-3 V/m