Does every scientific investigation start with an observation

A mover pushes a 30.0 kg crate across a wooden floor at a constant speed of 0.75 m/s. If the coefficient of static friction for wood-on-wood is 0.20, what is the normal force exerted by the floor on the crate?

When is the force on a current carrying wire in a magnetic field at its strongest

Which of the following are comprised of proteins? Select one or more: a. hair b. nails c. muscle d. bone

A red car with a mass of 3.0 kg traveling at 8 m/s collided with a blue car with a mass of 2.0 kg, which is at rest. The velocity of the blue car after the elastic collision is 9.6 m/s. What is the velocity of the red car?

How does uncertainty relate to measurements and calculations made during an investigation?

Ways that charges can be transferred

If you drive at 100 km/hr for six hours how far will you go

Chemical bonds are formed from the attractive force of atoms for electrons. What is the force called?

How resistance, current, and voltage behave in a series circuit.?

A father racing his son has 1/3 the kinetic energy of the son, who has 1/2 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son