What freezes at minus 50?

Why does a ball roll faster down a steep ramp than down a shallow ramp? How do you write 0.037 in scientific notation? Find the circumference diameter equals 25.8cm? How many syllables does th word Pretzel? What is 7.5 dozen in decimal form? What day of the week was May 18 1868? What kind of variable is 6x? How do you write four less than three times a number is three more than two times the number what is the number? What percent of 20 is eleven? How does the chiming clock make anne feel? When we are naming elements with a transition metal why do we need to write a Roman numeral in the middle? What three dimensional figure has a top view as a square and side views as triangles? What is the value of one kilogram of US nickels? In an isosceles triangle if the base is 8 inches long and the legs are 10 inches long what is the measure of a base angle? What percent of 132 is 76.56? What is 15 percent out of 2000.00? What Object is about as long is 1 km? Are multiples by 8 4 or 2 which is correct? What are the paradoxes of Zeno? What number comes between 30 and 60?