A car makes a 75 mile trip in 1 hour. For the first 30 minutes, it travels at 50 miles per hour. For the second 30 minutes, it travels at 100 miles per hour. What is the instantaneous velocity of the car at minute 45? c A- 25 mph B- 50 mph C-75 mph D- 100 mph

What is the length x of the side of the triangle below? (hint: use the cosine function)

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.