Because the two paths are perpendicular, therefore the
target proton's new path must be at 30 degrees from the original
direction.
Using the law of conservation of momentum about the original direction:
m (400 m/s) = m (v1) cos(60) + m (v2) cos(30)
Cancelling m since the two protons have similar mass.
(v1)cos(60) + (v2)cos(30) = 500 m/s ---> 1
Now by using the law conservation of momentum perpendicular to the original
direction:
m (0 m/s) = m (v1) sin(60) – m (v2) sin(30)
Which simplifies to:
(v1)sin(60) - (v2)sin(30) = 0 m/s
v2 = v1 * sin(60) / sin(30) = v1 * sqrt(3) ---> 2
Plugging equation 2 to equation 1:
(v1) (1/2) + (v1 * sqrt(3)) sqrt(3)/2 = 500 m/s
(1/2) (v1) + (3/2) (v1) = 500 m/s
2 (v1) = 500 m/s
v1 = 250 m/s
Thus, from equation 2:
v2 = v1*sqrt(3) = (250 m/s) sqrt(3) = 433.01 m/s
So,
A. The target proton's speed is about 433 m/s
B. The projectile proton's speed is 250 m/s
Answer:
D &B
Explanation:
Using Fleming right hand rule that States that if the fore-finger, middle finger and the thumb of left hand are stretched mutually perpendicular to each other, such that fore-finger points in the direction of magnetic field, the middle finger points in the direction of the motion of positive charge, then the thumb points to the direction of the force
Answer:
The correct option is b) By the time they get to be theories, they cannot be disproven. It's not necessary that the theories are always right. They can be proven wrong.
Explanation:
Answer:
256 ×a0
Explanation:
I have added an attachment because I am not sure the phrase that negates brainly word why I couldn't submit the answer directly.
View the explanation from attachment 3 followed by 2 and then 1
Before answering this question first we have to understand temperature and thermal energy.
Thermal energy of a substance is defined as the sum total of kinetic ,potential etc. energy of the substance. When two bodies come in contact with each other,the part of the thermal energy is transferred from hotter body to the cooler one which is called heat.
Temperature is the physical quantity which gives the direction of heat flow and determines whether two thermodynamic systems are in thermal equilibrium or not. Temperature of a thermodynamic system is a measure of average kinetic energy of that system.
If two systems have same average kinetic energy,then two systems must have same temperature.The temperature of a substance increases or decreases due to the change in average kinetic energy.
As per the question the two glasses have same thermal energy.It is told that the two glasses must have same temperature which is wrong.It is because thermal energy does not mean the average kinetic energy of the glass. Kinetic energy is a part of thermal energy.
Hence two glasses may be at different temperature depending on their average kinetic energy.
