ACTIVITY 3. Given the following data table, solve for mean, standard deviation and variance. Then write the correct measurement of the physical quantity.
Table 1: measurement of volume of a liquid 25.60mL 21.30mL 30.16ml 28.70mL
mean, x=
standard deviation, o = variance, oʻ=
volume of a liquid
Table 2: measurement of mass of an irregularly shaped stone 0.0388 0.040g 0.036g 0.0428
mean,
standard deviation,
variance,
mass of a stone

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

Aforce of 8,480 n is applied to a cart to accelerate it at a rate of 26.5 m/s2. what is the mass of the cart? 865 kg 320 kg 12.1 kg 3.12 kg