A hammer is thrown upward with a speed of 14 m/s on the surface of planet x where the acceleration due to gravity is 3. 5 m/s2and there is no atmosphere. What is the speed of the hammer after 8. 0 s? (hint: the calculation is just for magnitude).

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.

Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.