Answer Happy

U - 1k) (A) (T) (t)/d. The heat flow is inversely proportional ortional to! A. d/k B. Т A Е. C. AT/d D. t 4. A car's engine completes 2000 revolutions per minute. What is the of the revolutions in H2? minute. What is the frequency A. 22.2H2 2. 33. 3H2 c. 44.4Hz D. 55.5Hz E. 66.6H2 5. At noon the sun is at the south and 75° above the horizon. How hig building if the length of its shadow is, 5.5m? he horizon. How high is the A, 20.5m B. 31.7mc . 45.1m D. 53.6mE . 68.3m Find 6. A bullet is shot straight up. It leaves the gun at a speed of 290 m/s. AS1 falls back, it hits the gun. What was the highest point E Ecached? 3 Lt A. 1900m B. 3725m c. 4297m D. 5314m E. 5905m 7. A concrete sidewalk 3 feet wide surrounds a rectangular 14 ft by 35 ft Swimming pool. A fence has to be erected 2 feet away from the sidewalk. The fence has two gates, each 3 feet wide not part of the fence). How long is the fence? A. 51 ft B. 75 ft C. 105 ft D. 116 ft E. 132 ft 8. An airplane reaches cruising altitude 75 km east of the airport. It then keeps cruising eastward at 800km/hr. How far from the airport will it be 2.5 hours later? A. 875km B. 1075 km c. 1575km D. 2075km E. 3000km 9. A force of BON points +30° with respect to the x-axis. The force acts on an object of mass 4kg. What is the x-component of the acceleration? A. O m/s2 B. 17.3 m/ s c . 25.1 m/s2 D. 36.8 m/s? E: 48.0 m/s 10. Two forces act on a box of mass 4.5kg that rests on a horizontal plane. The first force, of 33N points to the east, and the second of 44N points to the north. Find the magnitude of the acceleration of the box. 1. 12.2m/s / B. 21.5m/s2 c. 34.2m/s? D. 45.1m/s? E. 68.3m/s2 11. A refrigerator of mass 75 kg rests on the floor. The static friction coefficient between the refrigerator and the floor is 0.15 . What is the smallest force needed to move the refrigerator? E. 555 N B. 222 N A. 111 N D. 444 N c. 333 N