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1.A 9 gram bullet is fired horizontally at a tree and is brought to a halt right before it exits the tree. the tree is 90cm thick and exerts a resistive force of 16000N on the bullet as it travels through the tree. Given this information find the initial velocity of the bullet before it hit the tree. Show answer in meters not cm.
2.A ball is thrown with a valocity of 30 m/s at an angle of 40 degrees above the horizontal from the top of a 100m tall building.
a) what is the greatest vertical height ball achieves?
b) what is balls velocity when it lands. (neglect air resistance in both cases) DO NOT USE 2D projectile motions, only work or energy considerations.
A river flows towards a lake with a velocity of 3 m/s and rate of 500 m3/s at a location of 90 m above the lake surface. Determine the total power generation potential of the river at that location.
What is the pH of the solution created by combining 0.90 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?
A large part of Holland is below sea level.Earthen dikes keep the sea at bay. There's a Holland legend of aboy who uses his finger to plug a hole in the dike and saves thecountry side. Assume the center of the hole is located 3.0
A circular rc girder for the foundation raft of water tower has dia 10m.the udl load transmittedby 8 coloumn on te girder being 300 kn/m.the width of the beam is 500 mm and the over depth.
the velocity of a particle is given by the relation v=100-10x, where v is expressed in meters per second and x in meters. Knowing that x=0 at t=0, determine (a) the distance traveled before the particle comes to rest
Determine the rate of ammonia (NH4-N) utilization and the biomass growth rate for the following conditions: µm = 0.50 g VSS/g VSS-d Ks = 0.50 mg/L X = 10 mg/L S = 40 mg NH4-N/L
An object is submerged in a water tank and tethered by a line to the bottom of the tank. If the object has a density of 45 kg/cubic meter and a volume of 2.5 cubic meters, what is the tension in the line?
A driver is travelling at 50 mi/h on a wet road. An object is spotted on the road 500 ft ahead and the driver is able to come to a complete stop just before hitting the object.
The rectangular beam is 18 ft long and subjected to a uniformly distributed dead load of 1.5 kip/ft (not including the beam weight), a live load of 1.5 kip/ft, and a load of 2 kip/ft by earthquake effect.
The cross sectional area of each bar is A = 400 mm2 and L = 250 mm. If the cross bar is loaded with a load P = 250 kN, what are the normal stresses in the bars afterward?
within a field that is used for agricultural production, a clay unit is found at a depth 8ft below the land surface. the surface soil has a hydraulic conductivity of .6 ft/d. if parallel drains are placed 2 in per day.
Assuming that the coefficient of friction between the tires and the pavement is 0.30, determine the braking distance downhill and the percent grade of the highway at that section of the road.
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