A weightlifter raises a 200-kg barbell with an acceleration of 3 m/s^2. How much force does the weightlifter use to raise the barbell?

A simple harmonic oscillator completes 1550 cycles in 30 min. (a) Calculate the period. s (b) Calculate the frequency of the motion. Hz

How could you make a sound wave have a lower pitch

Was the significant digits convention indicative of your uncertainty in the measurements above

How many neutrons does element X have if its atomic number is 48 and its mass number is 167? How many neutrons?

Which of the following is true of the inner core of the earth? A. It is the consistency of asphalt. B. The average temperature is 4000 degrees. C. It is so hot that the elements vibrate in place. D.

A set of data is collected from a simple circuit with a 20 resistor and is represented in the table

A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. Assume that the magnitude of the acceleration due to gravity is g. a.

8. What happens to force when mass is increased?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades