The total number of protons plus neutrons in an atom of ⁴⁵₂₀Ca is

A.) 20

B.) 25

C.) 45

D.) 65

Give two factors that will increase the magnetic field strength of an electromagnet

Match each term to its definition. element compound ion isotopes cation anion A. substance made of just one type of atoms B. a positively charged ion resulting from the loss of electrons C.

Temperature, salinity and density are factors that form a. deep currents C. surface currents b. wind currents d. deflection currents

A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total time in hours? Be careful to carry over the proper number of significant figures when you convert to hours.

When a sailboat overtakes a powerboat, which vessel is the stand-on vessel?

2. How is temperature related to kinetic energy?

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?