Please help answer this hydrology related question. Please show all steps for the answer given. Only correct and detailed answers will be accepted. Thank you.

A driver is traveling 55 mi/hr on a wet road. An object is spotted on the road 450 ft ahead and the driver is able to come to a stop just before hitting the object. Assuming standard perception/reaction time and practical stopping distance, determine the grade of the road.

An equal-tangent crest vertical curve has a 50 mi/h design speed. The initial grade is +3%. The high point is at station 33+37.43 and the PVT is at station 37+18.26. What is the elevation difference between the high point and the PVT?

shortcoming of the ramjet engine is the lack of static thrust. To overcome this, it is proposed

A horizontal curve on a single-lane highway has its TC at station 1+346.200 and its PI at station 1+568.700.

Please help with attached problems

Consider a house into which radon is emitted through cracks in the basement. The total volume of the house is 650 m3 (assume that the volume is well mixed throughout). The radon source emits 250 pCi/s (A picoCurie [pCi] is a unit proportional to the amount of radon gas and indicates the amount of...

The 20-kg mass is suspended from three cables. Cable AC is equipped with a turnbuckle so that its tension can be adjusted and a strain gauge that allows its tension to be measured. If the tension in cable AC is 40 N, what are the tensions in cables AB and AD?

A test of a driver's perception reaction time is being conducted on a special testing track with wet pavement and a driving speed of 55 mi/hr. When the driver is sober, a stop can be made just in time to avoid hitting an object that is first visible 520 ft ahead. After a few drinks under...

A motorist traveling at 55 mph on an expressway intends to exit from the expressway using an exit ramp with a maximum allowable speed of 30 mph. At what point on the expressway should the motorist step on her brakes in order to reduce her speed to the max allowable ramp speed? Assume the...