Why mass does not affect period of the pendulum?

What simple machines would you find in a kitchen?

An external, frictionless pin only prevents rotation. A. True B. False

Which statement correctly describes the movement of thermal energy according to the second law of thermodynamics? The natural tendency of systems is for heat to flow from a cooler object to a warmer one.

a butterfly has a wingspan of 66mm and a height of 6cm which i greater its wingspan or its height

Which of the following best describes the noble gases? have an outer electron shell that needs only 1 electron are highly reactive have a full outer electron shell combine easily with other elements

5. What is the percent composition of sulfur in H2SO4? A. 32.7% B. 65.2% C. 98.1% D. 2.1%

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form