An object of mass m is thrown vertically upward from the surface of Venus, where the acceleration due to gravity is g2. The initial speed is v2, and the object reaches a maximum height of y2. If a similar object is thrown upward with initial speed v1=7v2 from the surface of Saturn's moon Tethys, its maximum height is y1. The acceleration due to gravity on Tethys is g1.Express the ratio of y1 to y2 in terms of g2 and g1.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up