Force is simply, an interaction of an object to
another by a push or pull. Friction force is when an object wields force by two
objects being pressed together; it may also oppose the object’s direction. This
force has two types: sliding and static friction. Sliding friction is simply
the force exerted when an object slides in a surface. Static friction is when
both objects are at rest and an external force affects and creates a motion of
one of the objects causing that object to create a motion to the other.
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Answer:
áp dụng công thức í, mình thấy câu này có rắc rối gì đâu
Answer:
The magnetic field strength is 0.29 T.
Explanation:
Given that,
Length of current-carrying wire, L = 52 cm = 0.52 m
Current, I = 15 A
Magnetic force, F = 2.3 N
We need to find the magnetic field strength. We know that the magnetic force is given by :
B is magnetic field strength
So, the magnetic field strength is 0.29 T.
Newtons third law of motion applies to football as when the ball is thrown, force is applied to the football thrown forward and also force back to the player. Therefore it states that every action has a reaction. The player does not get a huge force back from throwing the football due to the player having a bigger mass than the football being thrown.
In short, when the football is throw, there is a reaction with the ball and the player accordingly with the force put into the ball.
Answer:
d. 50 C
Explanation:
In this problem, we have to add 800 ml of water at 20 Celsius to 800 ml of water at 80 Celsius.
According to the 2nd law of thermodynamics, heat transfers from hot to cold temperature.
The quantity of both the different waters is equal so this makes it very easy. All we have to do is find the mean of both the temperatures:
Final temperature = (20 C + 80 C)/2
= 50 Celsius
