Adog is chasing a cat towards a tree. the cat has a 10-yard lead and runs at 6 yards per second. the dog runs at a speed of 8 yards per second. the tree is 30 yards away from the dog's starting position. which animal will reach the tree first?

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation