An object has a mechanical energy of 1575 j and a potential energy of 1265 j.

a. what is the kinetic energy of the object?

b. if the mass of the object is 12 kg, what is its speed?

c. how high above ground is the object?

7.a 5 kg object is moving downward at a speed of 12 m/s. if it is currently 2.6 m above the ground…

a. what is its kinetic energy?

b. what is its potential energy?

c. what is its mechanical energy?

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Which best represents the law of conservation of mass ?

Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.