Question Solved1 Answer You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 4.00 s after it was thrown. What is the speed of the rock just before it reaches the water 27.0 m below the point where the rock left your hand? Ignore air resistance Express your answer with the appropriate units. НА ? v= Value Units Submit Request Answer

Your answer is partially correct. At 20°C, a rod is exactly 18.32 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 280°C, where the rod now measures 18.57 cm on the same ruler. What is the coefficient of thermal expansion for the material of which the rod is made? The linear expansion coefficient of steel is 11x 1061/C°. Number i 0.000061 Units /Cor (Cº)A-1

Running speed for adult men of a certain age group is known to follow a normal distribution, with mean 6.7 miles per hour and standard deviation 1.3. Jim claims he run faster than 80% of adult men in this age group. What speed would he need to be able to run for this to be the case? Give your answer accurate to two digits past the decimal point.

Part A A sled starts from rest at the top of a hill and slides down with a constant acceleration. At some later time it is 144 m from the top 2.00 s after that it is 25.6 m from the top, 2.00 s later 40.0 m from the top, and 2.00 s later it is 57 6 m from the top What is the acceleration of the sled? ΨΗ ΑΣΦ BMW ? a= m/s Submit Request Answer Part B What is the speed of the sled when it passes the 144-m point? | ΑΣφ ? V m/s Submit Request Answer Part How much time did it take to go from the top to the 14.4-m point? A sled starts from rest at the top of a hill and slides down with a constant acceleration. At some later time it is 144 m from the top 2.00 s after that it is 256 m from the top, 2.00 s later 40.0 m from the top, and 2.00 s later it is 57 6 m from the top ΨΗ ΑΣΦ ? Submit Request Answer Part D How far did tho sled go during the first second flor passing the 14.4 m point? Vol Axo ? m Submit Request Answer

(a) What is the slope of the line with vector equation r(t) = (-9 + 4t, 1 + 3t) ? (b) Find parametric equations of the line that passes through the point (1, -4) and is perpendicular to the line with vector equation r(t) = (-9 + 4t, 1 + 3t). (Enter your answer as a comma-separated list of equations where x and y are in terms of the parameter t.)

The probability that a randomly selected man from the certain age group runs slower than 5.66 mph is 0.2119. (You can check this, for practice, but it's true.) Calculate the probability the man runs between 5.66 and 8.65 mph, using this and your answer to the previous question. To help you accomplish this, consider the following three pictures of areas under the normal bell curve. This depicts the probability the man is slower than 8.65 mph. -3 -2 - 1 0 1 2 3 This depicts the probability the man is slower than 5.66 mph. This depicts the probability the man is slower than 5.66 mph. -3 -2 - 1 0 1 2 3 This depicts the probability the mans runs between 5.66 and 8.65 mph. i -3 n

Statement of Retained Earnings Use the following information to find dividends paid to common stockholders during 2021.GivensBalance of retained earnings, December 31, 2020$462m.Plus: Net income for 2021 15m. Total available = 477Less: Cash dividends paidPreferred stock$1m.Common stock ? Total cash dividends pair ?Balance of retained earnings, December 31, 2018$470m.