9) Sketch the torque speed curve for a typical induction motor. Label the synchronous speed (N) rated torque (TR) rated speed (NR)
A rifle with a weight of 25 N fires a 5.5-9 bullet with a speed of 230 m/s. (a) Find the recoil speed of the rifle. m/s (b) If a 800-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle. m/s
9. A shift to the right of the demand curve could be caused by a(n): A decrease in tastes or preferences. B decrease in the price of a substitute. C increase in income if the good is normal. D increase in the price of a complement. 10. Suppose that summer in a resort town is very rainy. We can expect demand to shift and the equilibrium price for hotels to . A left; fall B left; rise C right; fall...
A flywheel has a moment of inertia of 210 kg · m2 and the speed of 600 rpm. An aggregate is connected to the wheel with the moment of inertia 70 kg · m2. Calculate the system's new speed. How many percent of it original mechanical energy has the flywheel left after the connection? ( Answer 450 rpm; 75%)
A 210-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 25° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest? answer in rad/s
A sample of 400g of radioactive lead-210 decays to polonium-210 according to the function A(t)=400e−0.032t, where t is time in years. Find the amount of radioactive lead remaining after (a) 4 yr, (b) 6 yr, (c) 15yr. (d) Find the half-life.
s=25
9. Find I? 10 v 1도 210 0 3100 2SO | 110V 210 0 | 3 3100
3. A 33-KW motor, using a set of gears, drives a shaft at a speed n, as illustredted in Fig. P3, with a safety factor = 2.2 what will be the total angle of twist between A and B. Given: G = 82 GPa, Typ = 210 MPa, n = 1500 rpm? (a) 16.64", (b) 18.64", (c) 14.64°9, (d) 10.64", (e) none of above -2m- 5 m с Motor 25 kW 8 kW off off 33 kW Fig. P3
A circular coil that has N = 210 turns and a radius of r = 9.00 сm lies in a magnetic field that has a magnitude of Bo = 0.0600 T directed perpendicular to the plane of the coil. What is the magnitude of the magnetic flux Og through the coil? OB = 0.321 The magnetic field through the coil is increased steadily to 0.180 T over a time interval of 0.515 s. What is the magnitude El of the...
3. A 33-kW motor, using a set of gears, drives a shaft at a speed n, as illustredted in Fig. P3, with a safety factor = 2.2 what will be the total angle of twist between A and B. Given: G = 82 GPa, Typ = 210 MPa, n = 1500 rpm? (a) 16.64°, (b) 18.64°, (c) 14.64°9, (d) 10.64", (e) none of above 2 m 5 m A с C B Motor 8 kW off 25 kW off 33...