Answer:
105 g
Explanation:
We are given that
Impulse=I=1 N-s
Initial velocity,u=-3.8 m/s
Final velocity,v=5.7 m/s
We have to find the mass of the ball.
Impulse=Change in momentum
I=m(v-u)
Using the formula
Where 1 kg=1000 g
B. The relationship between voltage, current and resistance is V=IR where V is directly proportional (one increases, the other also increases) to I and R while I and R are indirectly proportional (one increases, the other decreases).
Answer:
Repeatability is how much variability in the measurement system is caused by the measurement device. Reproducibility is how much variability in the measurement system is caused by differences between operators.
Answer:
it can be 15 or 75
Explanation:
using this equation
f = focal length
so = object distance
si = image distance
since we do not now what lens used, I assume from the problem the lens are positive (convex) but I don't know the image position because lens have two side.
1. the positif lens with negative image distance (it means object and image are in the same side of lens)
1/25 = 1/so - 1/37.5
1/so = 1/25 + 1/37.5 = 1/15
so = 15 cm in front of the lens (same side with the image)
2. the positif lens with positive image distance (it means object and image are not in the same side of lens)
1/25 = 1/so + 1/37.5
1/so = 1/25 - 1/37.5 = 1/75
so = 75 cm in front of the lens (not in the same side with the image)
Answer:
V = 10581.59 V
Explanation:
To solve this problem, we have to take into the relation between the kinetic energy of an electron and the energy generated by the potential difference of an electric field. This relation is given by
where m is the mass of the electron, v is the velocity of the electron, e is the electric charge and V is the potential difference that accelerated the electron.
By taking V from the last expression we have:
where we have taken that
me = 9.1*10^(-31) Kg
e = -1.6*10^(-19) C
v = 6.1*10^(7)
I hope this is useful for you
Regards