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At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long does it take to accelerate from 82 km/h to 113 km/h?
A golf ball of mass 0.045 kg is hit off the tee at a speed of45 m/s. The golf club was in contact with the ball for 5.0 x10-3 s. evaluate the average force exerted on the ball by the golfclub
A 55-kg hiker starts at an elevation of 1600 m and climbs to the top of a 3100-m peak. What is the hikers change in potential energy
A ray of light passing through water struck the water glass interface making an angle 50 with the interface. find the angle of refraction of the light in glass
A group of hikers hear an echo 2.50 s after they shout. If the temperature is 28°C, how far away is the mountain that reflected the sound wave.
a long spring is stretched and attached to two walls 5.42 m apart. the mass of the spring is 276 g. the tension in the
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 183 MeV, How many nuclei are in the beam
A 0.20 g of hydrogen gas are help in a rigid container. The temperature of the gas is changed from 50 K to 80 K. How much heat is needed
A bowling ball of mass 7.2 kg and a radius of 9.9 cm rolls without slipping down a lane at 2.8m/s. Calculate its total kinetic energy
a man and a boy are carrying a uniform wooden beam that is 8 m long and weighs 900 n. the boy lifts at one end. at
Two parallel, vertical, plane mirrors, 31.9 cm apart, face each other. A light source at point P is 29.8 cm from the mirror on the left and 2.1 cm from the mirror on the right. Find the number of reflections of light rays for each of these images
A circuit contains only a(n) 0.219 H inductor. An AC voltage of peak value 163 V and frequency 61.3 Hz is applied to the circuit. When the instantaneous voltage is 163 V, what is the instantaneous AC current?
Calculate the labour price (rate) variances for each worker level. b. Compute the labour efficiency variances for each worker level. c. Compute the labour mix variances for each worker level.
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