Cosmic rays are high-energy radiation which do not have a visible color, but if you mean the paint type it is a grayish color.
Answer:
a.)
b.)
Explanation:
<u>Electric Field and Potential Difference</u>
There are several conditions that must be met for a spark to be created into an air gap. Once the physical conditions are fixed, a minimum electric field is necessary for the spark to be initiated. Let s be the separation between the electrodes and V their potential difference. The electric field is
a.)
Solving for V
The separation is
Thus the potential difference is
b.) If the separation was greater, the applied voltage needs to be greater if the electric field has to be constant. One possible measure to keep electrodes as close as possible is to build them as sharp edges. It gives the spark an easier path to travel to.
If the separation is 0.05 inches =0.00127 m
Kepler based his laws of planetary motions off of Newton’s law of gravity.
We are given an object sliding down an incline with a friction force. A free-body diagram of the system is the following:
Now we will add the forces in the x-direction:
We will consider the forces that are in the direction of the movement as positive and the ones in the direction against the movement as negative. Plugging in the forces:
Now we solve for the friction force:
Multiplying both sides by -1:
Now we determine the x-component of the weight using the following triangle:
From the triangle we can use the function cosine as follows:
From this we can solve for the x-component of the weight by multiplying both sides by "mg":
Now we use this expression and replace it in the sum of forces:
Now we plug in the known values:
Solving the operations:
Therefore, the friction force is 171.5 Newtons.
Answer:Zero
Explanation:
Given
mass of ball
If the ball is thrown upward then at maximum point velocity of ball is zero because ball is no longer able to move upward
Momentum(P) of a particle is given by
Therefore at the highest point momentum is zero .