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A 90° elbow is used to direct water (? = 1000 kg/m3) flow at a rate of 25 kg/s in a horizontal pipe upward. The di-ameter of the entire elbow is 10 cm. The elbow discharges water into the atmosphere, and thus the pressure at the exit is the local atmospheric pressure. The elevation difference between the centers of the exit and the inlet of the elbow is 35 cm. The weight of the elbow and the water in it is con-sidered to be negligible. Determine (a) the water velocity at inlet and outlet, (b) the gage pressure at the inlet of the elbow and (c) the anchoring force needed to hold the el-bow in place. Assume the flow is steady, frictionless, andirrotational.
A 20-kg block, m1, with a pulley attached slides along a frictionless ledge. calculate the tension in the connecting string
A charge of -2.05 nC and a charge of -6.20 nC are separated by a distance of 70.0 cm. Find the position at which a third charge of +7.20 nC can be positioned ( from the -2.05 nC charge) so that net electrostatic force on it is zero.
What is the relationship between electric potential and electric field, If we know the electric potential everywhere in a region
A compound microscope uses a 73.0mm lens as the objective and a 2.1cm lens as the eyepiece. find the total magnification produced by the microscope
Two long straight parallel wires are 12cm apart. Determine the force on wire A due to wire B, and the force on wire B due to wire A.
A compound microscope has a barrel length of 163.0 mm and an objective with a 4.110-mm focal length. Find the angular magnification of the eyepiece
An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, find the power delivered to the customer
Two packing crates of masses 10.0 kg and 5.00 kg are connected by a light string that passes over a frictionless pulley. The 10.0 kg crate lies on an incline of angle 40.0° with a coefficient of kinetic friction 0.250.
An 800 kHz radio signal is detected at a point 9.5 km distant from the transmitter tower. Find the average electromagnetic energy density
q1. diffraction also occurs with sound waves. consider 1900-hz sound waves diffracted by a door that is 87 cm wide.
A car travelling at 25.0 {rm m/s} runs out of gas while travelling up a 22.0^circ slope. How far will the car go up the hill before it runs out of gas.
A light ray is incident from air onto the surface of a very quiet lake. what is the index of refraction of the water
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