How many unique values of x solve x2 + 4x + 4 = 0?

If the average pitcher is releasing the ball from a height of 1.8 m above the ground, and the pitcher's mound is 0.

What is the major limitation to the light microscope?

An airplane flies eastward and always accelerates at a constant rate. At one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s.

A roller coaster starts from the top of a hill at rest with a potential energy of 3300 J.

How much total energy is dissipated in 10. seconds in a 4.0-ohm resistor with a current of 0.50 ampere? (1) 2.5 J (3) 10. J (2) 5.0 J (4) 20. J

What are the starting ingredients and products of photosynthesis and cellular respiration

give 2 examples of events that show that the speep of sound is very much slower than the speed of light

A clay blob of mass m1, initially at rest, is pushed across a frictionless surface with constant force F for a distance d. It then hits and sticks to a second clay blob of mass m2 that is at rest.

In an electric motor, the rotating coil of wires wrapped around an iron core is a (n) brush transformer commutator armature

When you move from place to place, how do you know you moved?