Calculate the force on a unit positive charge at P on x axis, where coordinates are (x=2, y=0) due to the following charge of 10^-9 situated in air at the origin(x=0, y=0) and the negative charge of 2×10^-9 situated on the x axis at point (x=1, y=0) ​

How much heat is required to convert 0.3 kg of ice at 0°c to water at the same temperature

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n