Power = current x voltage
So the power is 7 x 110 = 770 W = 0.77kW
0.77 x 13 = 10.01 kWh
10.01 x 10 cents = 100.1 cents (is this 1 dollar? Idk I use a different currency)
Answer:
time=4, answer choice A
time=5.5, answer choice B
Explanation:
This is taken from the kinematic equation, v=vo+(1/2)at^2
Velocity at time 4 = 30+(2.5)(4)^2
Velocity at time 5.5 = 30+(2.5)(5.5)^2
Velocity at time 4 seconds = 70 m/s
Velocity at time 5.5 seconds = 105.63 m/s
Answer:
¢
Explanation:
Given that:
Mass of metal = 12g = 0.012
Density of metal = 4 g/cm³ = 4000kg/m³
Density of oil = 1.5g/cm³ = 1500 kg/m³
Recall : density = mass / volume
Volume of metal, V = mass / density = 0.012/ 4000 = 0.000003
0.000003
T + Density of oil * g * V - (0.012 * 9.8) = 0
T + 1500 * 9.8 * 0.000003 - 0.1176 = 0
T = 0.0441 - 0.1176 = 0
T = 0.1176 - 0.0441
T = 0.0735N
Tension, T
Given :
Mass of box , m = 250 kg.
Force applied , F = 285 N.
The value of the incline angle is 30°.
the coefficient of dynamic friction is .
To Find :
The speed with which the box is moving with, assuming it takes 4 seconds to reach the top of the incline.
Solution :
Net force applied in box is :
Acceleration , .
By equation of motion :
Therefore, the speed of box is 12.04 m/s.
Hence, this is the required solution.
Answer:
3.69 V
Explanation:
By connecting across the resistor, the capacitor starts discharging.
The voltage across the capacitor when discharging is given by
V is the voltage across it at time t,
is the initial voltage when fully charged,
T is the time constant
After one time constant, t = T. Then
From the question,