The International Space Station (ISS) orbits Earth at an altitude of 360 km above Earth's surface. The acceleration required keep the ISS in orbit along a circular path is provided by Earth's gravity, which is directed toward the center of Earth and hence toward the center of the orbit. Earth's gravitational pull decreases gradually with altitude, so the acceleration due to gravity that is exerted on the ISS is only 8.78 m/s. (a) What is the orbital speed of the ISS in meters per second?

(b) Kilometers per hour?

(c) And miles per hour?

How long (in minutes) does it take the ISS to complete an orbit? (Note that the radius of Earth is 6378 km].

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver

Up of elements with the same number of valence electrons. vertical column in the periodic table of elements such as alkali metals or halogens. a horizontal row of elements in the periodic table. this is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table. periodic trend these are the highly reactive elements located in group 1 of the periodic table. these elements have one electron in their outer energy level which makes them highly reactive with water and halogens. these are the reactive elements located in group 2 of the periodic table. these elements have two electrons in their outer energy level which makes them reactive with water and halogens. alkaline earth metals these are the group 3 or d-block elements. these dense metals with high boiling points can have different oxidation states and all are solid at room temperature with the exception of mercury. transition metals this is the highly reactive family of elements with 7 valence electrons. this is an element with full valence shell, very unreactive. this is a group of elements with few valence electrons that conducts heat and electricity. one of a class of elements having properties intermediate to metals and nonmetals. this is a type of element that has many valence electrons, not a conductor.