To save money on buying mercury you build a barometer using water as the fluid inside the column. approximately, how tall is your barometer? (hints r(mercury) =1.36 x 10^4 kg/m^3 and r(water) = 1.00 x 10^3 kg/m^3).

Explain how plate tectonics have changed earth’s surface over time. include the role of plate tectonics in the creation of landforms.

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.