How to convert 5 kwh = 5 kwh

How to convert 5 kwh = 5 kwh

1 kilowatt hour = 1000 watts of electrical appliances work for one hour = we usually say 5 degrees of electricity

1. If a / b = C / D, prove (A & # 178; + C & # 178;) / (AB + CD) = (AB + CD) / (B & # 178; + D & # 178;)

(A & # 178; + C & # 178;) / (AB + CD) = (AB + CD) / (B & # 178; + D & # 178;), the cross is multiplied to get:
Left: (A & # 178; + C & # 178;) (B & # 178; + D & # 178;) = A & # 178; B & # 178; + C & # 178; B & # 178; + A & # 178; D & # 178; + C & # 178; D & # 178;
Right: (AB + CD) (AB + CD) = A & # 178; B & # 178; + C & # 178; D & # 178; + ABCD + ABCD,
Because a / b = C / D, we get ad = BC, and bring into the right: = A & # 178; B & # 178; + C & # 178; D & # 178; + AADD + cdcd = A & # 178; B & # 178; + C & # 178; B & # 178; + A & # 178; D & # 178; + C & # 178; D & # 178
Left = right, so it's true
Note: this method only needs to prove that left = = right. Take a look at the known conditions

Resistance, current, voltage, series and parallel formulas,
Is the separated (1) resistor (2) current (3) voltage
There are many formulas when they are connected in parallel or in series

Resistance parallel r = R1 * R2 / R1 + R2
Resistance series R = R1 + R2 + R3+
Series current I = I1 = I2 = i3
Current parallel I = I1 + I2+
Voltage series u = U1 + U2
Voltage series u = U1 = U2

1、 8kg is more than 5kg ()? 2, () kg is 60% less than () kg ()? 3, a rope is 9 meters long, 1 / 3 is used for the first time, and the remaining 1 / 3M is used for the second time,
Two times share () m, and () m is left

8kg is 60% more than 5kg
(4) 60% less than (10) kg
The two times shared (10 / 3) m, and the remaining (17 / 3) M

The specific heat capacity is a function of matter_____ One, its international unit is________ .

Specific heat capacity is one of the characteristics of material, unit: coke / (kg ℃). The specific heat capacity of water in common material is the largest

On a smooth horizontal plane, the wood blocks a and B with the mass of M1 and M2 are connected by a non extensible string (regardless of the mass). Under the action of the tension F,
(force F pulls on B) make a uniform acceleration motion with acceleration a, and suddenly withdraw the tension f at a certain moment. At this moment, are the accelerations A1 and A2 of a and B both zero?

Yes, AB moves in a straight line at the same speed when pulling force F is removed
Because at this time, if the rope has tension, when a accelerates and B decelerates, the rope will relax and there will be no tension. This is contrary to the assumption that the rope has tension. Therefore, the rope tension must be zero

One hectare is equal to one hundred mu?

1 mu = 666.6667 M2
1 ha = 10000 M2
So 1 hectare = 15 mu

A metal ball weighs 14.7n in air and 4.9n in water. The known density of the metal ball is 2 × 103kg / m3. Is the ball hollow or solid? If it is hollow, what is the volume of the hollow part?

(1) When the gravity g of the metal ball is 14.7n, the mass of the metal ball is m = GG = 14.7n9.8n/kg = 1.5kg, the volume of the solid part of the metal ball is v-solid = m ρ = 1.5kg, 2 × 103kg / m3 = 7.5 × 10-4m3; (2) the buoyancy of the metal ball in the water is f-floating = g-g1 = 14.7n-4.9n = 9.8N, the volume of the metal ball in the water is v-row = f-floating, ρ g = 9.8n1.0 × 103kg / m3 × 9.8n/kg = 1 × 10-3m3, ∵ the metal ball is immersed in the water The volume of the metal ball is v = V row = 1 × 10-3m3 (3) ∵ V solid < V ∥ the volume of the hollow part is v empty = V solid = 1 × 10-3m3-7.5 × 10-4m3 = 2.5 × 10-4m3. A: the metal ball is hollow, and the volume of the hollow part is 2.5 × 10-4m3

The length of the two sides of a triangle is 5cm and 10cm respectively. The angle is 30 degrees. The length of the hypotenuse of an isosceles right triangle equal to its area is ()

The two sides of the triangle are 5cm and 10cm in length, and the included angle is 30 degrees. According to the area formula, the area of the triangle is s △ = # 189; × 5 × 10 # 8226; sin30 # 186; = 25 / 2
Let the length of the right side of an isosceles right triangle equal to its area be a, then it has a hypotenuse of 5 √ 2
If you have not learned trigonometric function, the area of the first triangle can be calculated as follows:
Take the edge of 10 cm as the bottom, the edge of 5 cm and its angle of 30, and make it high from the other end to the edge of 10 cm. According to the fact that the right angle edge opposite to the angle of 30 is equal to half of the hypotenuse, the height of this line is 5 / 2. Therefore, the area s △ = & 189; × (5 / 2) × 10 = 25 / 2

The object M2 placed on a smooth horizontal table is connected with the object M1 suspended on the table by a rope passing through a fixed pulley
There is an object M2 on the smooth horizontal table. A pulley is fixed on the edge of the table. M2 is connected with the object M1 hanging on the edge of the table through the rope passing through the pulley. After releasing, the acceleration of the system is A1. If M1 is taken away and the force F equal to the gravity on M1 is used to pull the rope downward, the acceleration of M2 is A2, then
a1

In the first case, if the tension of the rope is f, then
For M1: M1 * G-F = M1 * A1
For M2: F = M2 * A1
Add the two equations left and right to get: M1 * g = (M1 + m2) * A1
So A1 = M1 * g / (M1 + m2)
In the second case, f = M1 * g = M2 * A2
a2=m1*g/m2
Obviously A1