150 fill in the blank questions in Physics in the second year of junior high school. The shorter the

You can go buy a book on physics. For example, the talent is worth it. Do it. There are answers later. And the rolls. It's not very expensive either.

There are a lot of them on this **, hope it helps.

How do you answer no questions? Hehe.

1.When the fog is filled, the car must turn on the fog lights to ensure safety, and the car fog lights use (yellow) light; The rear view mirror outside the car cab is a (convex mirror) mirror, and the sun cooker is a (concave mirror) mirror; Both the flashlight and the reflector inside the car headlamp are (concave mirror) mirrors in order to obtain (parallel) light.

2.The color of an actor's shirt can change with the color of the stage lights, and it can be judged that his shirt is (white), and the audience can see the actor's performance from all corners of the stage because of the (diffuse) reflection.

Temperature difference copper block Iron block.

Heat transfer 252000

q A q B, M A M B q A q B, M A = M B.

1.The condition for heat transfer to occur is the presence of a temperature difference

2.Copper and iron blocks of the same mass, if they absorb the same heat, the temperature rises more than the iron block

If they raise the same temperature, the one that absorbs more heat is copper c copper c iron).

3.Put a piece of 200°C iron into 1 kg of 10 water, the phenomenon of iron and water will occur, if the water temperature rises by 60, the heat absorbed by the water is coke.

3.There is a piece of metal, put in the sun to dry, the temperature rises by 10, the heat absorbed is coke, if the temperature drops by 5 after cooling with water, the heat released by the metal block is coke.

4.After absorbing heat, the temperature of the iron block rises more than that of B, so the possible relationship between the mass of iron block A and the heat absorbed by the iron block is as follows: Write out two kinds.

1: Temperature difference.

2: Copper and iron.

3: Heat transfer.

3:4: M A, M B, W A, W B; M A "M B, W A "W B.

There are so many things you want, 125 ways. There's nothing I can do!

There are many on the Internet, search for yourself.

125 Questions: Am I the one who made the question? That's a lot!

Solar and lunar eclipses can also be explained by the linear propagation of light The principle of plane mirror imaging can be explained by using the law of reflection of light When the ship sails from upstream to downstream and passes through the lock, the upstream and the lock should first form a communicator, and the ship enters the lock, and then let the downstream and the lock form a communicator, and the ship can reach the downstream water surface smoothly. (Fill in "upstream river" or "downstream river") Please explain in detail what is meant by "river", "lock" and "connector", thank you.

The water level in the upper continent is high and the water level in the downstream is low, and the river must have a certain depth to be navigable, so a sluice gate is installed at intervals so that the water from the upstream does not quickly flow downstream and dry up. However, the upstream water level of the lock is higher than the downstream and water level, and the ship cannot jump down when passing through the lock, so a communicator is used to enable the ship to pass through the lock smoothly.

Straight line propagation reflection upstream channel downstream channel.

A river is the surface of a river.

A lock is a lock built in a place where the water level drops significantly, and this lock can be understood as a "small reservoir". If the boat goes downstream from upstream, first maintain the water level and upstream level, the boat enters the "small reservoir", then the "small reservoir" drains the water so that it is level with the downstream, and then the boat sails out again, so that the boat goes downstream.

The communicator is the two containers in which the water can flow smoothly back and forth, and in this case, the upstream and the lock are the connectors.

Straight line propagation reflection upstream channel downstream channel. The river channel is the river, the lock is the plate that holds back the river water, and the upper opening of the communicator [definition] is not connected, and the container that is connected at the lower part is called the communicator. The U-tube is a feed-through.

Properties] When the same liquid in the communicator does not flow, the liquid level in each container that is in direct contact with the atmosphere is always kept at the same height. 【Explanation】 A communicator refers to an object that is open at both ends and connected at the bottom. The teapot is one.

Straight-line propagation; Reflection; upstream channels; Downstream river channels.

The container with the upper end open and the lower part connected is called the communicator. The Three Gorges Locks are the largest connectors.

0V, because L1 is short-circuited, then L1 is equivalent to a wire, so the voltmeter will also be short-circuited, so there is no indication.

6V, because L1 is open, then, the voltmeter is connected in series with L2, that is, the voltmeter measures the power supply voltage at this time, so it is 6V

6V, because L2 is short-circuited, then the voltmeter measures the voltage of L1, that is, the total voltage, so it is 6V

0V, because L2 is open, then there is no current in the circuit and therefore no voltage.

If the voltmeter junction L1, the answer: 0V, 6V, 6V, 0V

As shown in Figure 1, the power supply voltage is 6V, L1 and L2 are connected in series, A, B, and C are three binding posts, if L1 is short-circuited, the number of the voltmeter is 0V; If L1 is disconnected, the voltmeter will indicate 6V If L2 is shorted, the voltmeter will indicate 6V If L2 is disconnected, the voltmeter will indicate 0V

Hope it helps.