Hel please
Please write two paragraphs. In one, tell me about some things you have done in your life(present perfect)and when you did them (simple past). In the other one, tell me about some things I haven’t done yet(present perfect). Give me personally Details to make it more interesting 100-150 words.

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Which accounts for an increase in the temperature of a gas that is kept a constant volume