My weekend English composition

My weekend English composition

My Weekend
It is weekend.I am excited,It’s not because of weekend but “The Smurfs”,a 3D movie published by Sony Pictures Releasing (Argentina).After I have my lunch,I go to the Red Star cinema with my several friends early.It ’s hot outside,evrybody thinks it’s nothing.Time goes fast!On the way home, all of us fall in love with those lovely smurfs.What a nice movie !

The weekend plan is divided into three parts
Section one: Weather
Section 2: Plan
The mood of hope
Come on !

In this weekend,I have a plan,if tomorrow is a sunny day.Saturday morning,I am going to visit my grandparents.after lunch I have good friends and I go to the movies and football.At night,I can stay ho...

My English composition last weekend
Remember to use the past tense

I had a nice holiday in last weekend. My friend invited me to play table tennis with him. It was a relax sport. I would love it if there was no people smoking there, although the slogan on the wall sh...

There is a festival lantern with 30 small bulbs connected in series, all of which emit light. If the current at the power plug is 200mA, then the current through each small bulb is 200mA__ A. The voltage at both ends of each small bulb is about__ V

0.2,7.7

ABCD multiplied by 9 equals DCBA. What number does ABCD represent?

Four digit * 9 is still four digit, so a can only be 11bcd * 9 = DCB1, so d = 91bc9 * 9 = 9cb1, because 9b can't carry, so B can only be 1 or 0. Suppose B is 1,9c + 8, the number of digits is 1,9 * C is 3, so c is 7, but c * 9 can't carry, so B can only be 010c9 * 9 = 9c01,9c * 9 + 8

There are several methods to measure the equivalent resistance of passive two terminal network

(1) Open circuit voltage and short circuit current method?
When the output end of the active two terminal network is open circuit, use a voltmeter to measure the open circuit voltage UOC of the output end directly, and then short circuit the output end to measure the short circuit current ISC
If the internal resistance of active two terminal network is very low, it is not suitable to measure its short circuit current
(2) Voltammetry?
One method is to measure the external characteristic curve of the active two terminal network with voltmeter and ammeter, as shown in Figure 11-1. The open circuit voltage is UOC, and the slope TG φ is calculated according to the external characteristic curve, then the internal resistance is:
(3) Half voltage method?
As shown in Figure 11-2, when the load voltage is half of the open circuit voltage UOC of the network under test, the load resistance RL is smaller
It is the equivalent internal resistance Rs value of the active two terminal network
(4) Zero indication?
When measuring the open circuit voltage of an active two terminal network with high internal resistance, the direct measurement with a voltmeter will cause large errors. In order to eliminate the influence of the internal resistance of the voltmeter, the zero indication method is often used, as shown in Figure 11-3. The zero indication method is based on the comparison between a constant voltage source with low internal resistance and the active two terminal network under test, When the output voltage of the constant voltage source is equal to the open circuit voltage of the active two terminal network, the reading of the voltmeter will be "0", and then the circuit will be disconnected. The output voltage U of the constant voltage source is the open circuit voltage of the active two terminal network

Decimal is composed of integral part, decimal point and decimal part, so ()
A decimal "integer B integer" decimal C integer = 0 + decimal D uncertain
The sum of the two numbers is 35.4, and the larger number is divided by the smaller number quotient 3 to get 5.4?
The number a is one fourth of the number B, and the number C is three fourths of the number A. It is known that the sum of the three numbers a, B and C is 114. Find the number B
If two integers divide by two and the sum of the divisor quotient and the remainder is equal to 6006, what is the divisor?
3.4 questions

Question 1: D question 2: 27.97.5 question 3: 1824 out of 23 question 4: 1994

The circuit is composed of a power supply, a switch, an ammeter (ammeter and voltmeter) and several wires. The resistance values of two resistors are compared by two methods

A parallel circuit is designed. A resistor is installed on each of the two branches, and the current passing through them is measured with an ammeter respectively. Because this is a parallel circuit, the voltage is constant, the current of the conductor is inversely proportional to the resistance, and the resistance with the larger current number is smaller (the resistance between the branches does not affect each other, so this method is feasible)
Design a series circuit, in which two resistors are connected in series, and measure the voltage at both ends with a voltmeter. Because this is a series circuit, the current is equal everywhere. The greater the resistance of the conductor, the greater the voltage at both ends. Therefore, the resistance of the one with the largest voltage is greater

It is known that the parabola y = x2 + BX + C passes through the point (2,1), and the symmetry axis of the parabola is a straight line x = 12. The analytical formula of the parabola is obtained

According to the meaning of the problem, we get 4 + 2B + C = 1 − B2 = 12, and the solution is b = − 1C = − 1, so the analytical formula of this parabola is y = x2-x-1

The molar mass of a certain oil is m, and its density is ρ. If a drop of oil with V volume is dropped on the water surface, it can develop into a single molecule oil film with s area, from which the Avogadro constant can be estimated to be______ ．

It is known that the volume of a drop of oil is V, the area of the oil film is s, and the thickness of the oil film is equal to the molecular diameter. Then the diameter of the oil molecule is d = vs, the molar volume of the oil is vmol = m ρ, the volume of an oleic acid molecule is V1 = 16 π D3, and the Avogadro constant is Na = vmolv1 regardless of the intermolecular space. The above formulas are combined to obtain Na = 6ms3 π ρ v3 The answer is: 6ms3 πρ v3