Answer:
green light have high energy
Explanation:
We have given the wavelength of the red light
Speed of the light
The energy of the signal is given by
The frequency of the green light is given by:
So energy
So green light have high energy
Answer: D) Do rougher surfaces tend to create more friction than smooth surfaces?
Explanation:
Friction acts when either there is tendency or actually relative motion between two surfaces in contact. It depends upon the area of contact surface and roughness of the surfaces. More the area and roughness, more friction would be there. More friction would mean more force would be required to cause the relative motion between the two surfaces.
Here, sally and sue are changing the surface over ramp on which car moves. The surface area is same. The angle is same and the speed of the car is also same. So, the best research question to guide the girls' experiment would be D) Do rougher surfaces tend to create more friction than smooth surfaces?
Answer:
The mass of the another block is 60 kg.
Explanation:
Given that,
Mass of block M= 100 kg
Height = 1.0 m
Time = 0.90 s
Let the mass of the other block is m.
We need to calculate the acceleration of each block
Using equation of motion
Put the value into the formula
We need to calculate the mass of the other block
Using newton's second law
The net force of the block M
....(I)
The net force of the block m
Put the value of T from equation (I)
Put the value into the formula
Hence, The mass of the another block is 60 kg.
Answer:
I do not own this picture inserted below. Credits to the rightful owner. But i hope this help you <3
Answer:
The answer is CD, just had the same question myself.