Can I enter Pingdong except for physics B?

City one is estimated to be hopeless, this year A is not worth much, City two should be able to...

To be honest, I don't know about the high school raid you copied (it should be a good school.

bai), but can tell you a little bit about how to evaluate. Just look at the success of one person.

You need to know the percentage of your school that you can be admitted to in previous years, and then ask a few of your classmates to see what your grades are for. Good luck with it!

You are a candidate from Jiangsu, you must be very excited to know the results, I am from the last session. According to experience, you can't apply, but you can choose a good major in the next school, work hard in college, and the postgraduate entrance examination will give you the opportunity to go to a prestigious school for further study!

Good luck!

I'm also from Jiangsu, I took the college entrance examination last year, I took physics, about 50 points for the B line, about 80 or 90 points for the A line, I don't know much about chemistry, but I have a college roommate who chose chemistry, more than 80 points, is B, in fact, the specific score line is only known to the teacher, and there is no data when checking the score.

If you are not allowed to participate in the independent enrollment of Tsinghua University, Tsinghua University and Peking University will only consider the provincial first prize and above (national.)

First, second, third prizes and international competition awards), however, you can choose Zhejiang University, Dalian University of Technology, China University of Science and Technology, Renmin University and other famous universities.

d right. Analysis: The garbage in sewage is floating and suspended components, and only by removing these things can the "pure" identity of the water be returned.

YesRelativelyThe direction of friction experienced by each object is always in the direction of the two objects in motion (tendency to move).RelativelyThe movement of another object (tendency to move) is in the opposite direction.

For machinery that relies on friction to transmit force, the frictional force on the active part is opposite to the direction of its movement; The frictional force of the follower is the same as the direction of its motion.

The direction of the frictional force is not necessarily opposite to the direction of motion, but it must be opposite to the relative direction of motion.

There is relative sliding, and the frictional force is opposite to the relative direction of motion. If there is no relative slippage, look at the movement trend (you can assume that there is no friction and see how they will slide).

If it is a sliding friction force, the direction of the force is opposite to the relative direction of motion.

If it is static friction, because it is relatively stationary, but there is a tendency of relative motion, it can be assumed that the friction disappears, then relative motion will occur, ** out of the relative direction of motion, and the opposite can be done.

The force is mutual.

The frictional force is opposite to the relative motion or relative motion trend direction. That is, friction always hinders the relative motion of an object.

There is only one friction formula in high school physics.

Formula: f= fn fn: positive pressure (not necessarily equal to the gravitational force of the object applying force): kinetic friction factor (is a numerical value, unitless).

If you can't do the question, it's generally n's wrong.

On an inclined plane, n is multiplied by sin

The existence of friction is to ensure that the object is in a constant state within a certain range, that is, it is opposite to the direction of motion.

The direction of friction is the opposite direction of motion, which is the force that hinders the motion of an object.

It's easy to judge.

If A drives B forward with friction, the friction is in the same direction as the movement For example, a pulley carries a cargo, and a person walks forward.

In the same way, if A stops B from moving forward with friction, then the frictional direction is opposite to the direction of motion, for example, the vehicle brakes.

Friction is what hinders relative motion, and the direction of friction is judged by its relative direction of motion.

The general principles are:

Static friction is opposite to the direction of force, and kinetic friction is opposite to the direction of motion.

So the core is, first: force analysis, and second: parallelogram law to find the resultant force.

Three: the relationship between force and mass and acceleration, confirm the acceleration.

Fourth: the relationship between acceleration and time and velocity, find velocity.

Five: Analyze the velocity of a certain point.

Six: the parallelogram rule, find the speed, and the reverse is the friction.

You go forward and the friction moves forward, and you climb up and the friction goes up; That's not abstract, right?

The first step is to identify the object of study in each statement; Then look at whether there is relative motion or tendency of relative motion between the two objects that are in contact with each other.

The frictional force of A to B refers to the frictional force experienced by object B, the stressed object is B, and the object of study is that the frictional force experienced by B always hinders the sliding or sliding tendency of B.

For example, when B slides to the left on surface A, the direction of friction experienced by B is to the right; When B moves to the left from rest along with A on the surface of A, B does not slip to the right with respect to A, indicating that the static friction on B prevents it from sliding to the right, and the friction on B is directed to the left.

The Mocha force is in the opposite direction of motion.