Prove and identify the direction of the resultant, if two vectors meet at an angle less than 90⁰ and angle more than 90⁰ show the working and drawings ​

An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?