- 13. A cement-mixing bucket rolls off the top of a 65 .0-m building with a horizontal velocity of 1.25m/s How far from the base of the building will the mixing bucket strike the ground? a) 6.69 m b) 4.55 m c) 16.6 m d) 65.0 m
- roming ttp A. Wheel and Axle B. Screw C. Wedge D. Pulley 8. What type of wave is a sound wave? A. Transverse C B. Longitudinal C. Electromagnetic D. Seismic 9. What happens when a wave bends around a barrier? A. Reflection B. Refraction C. Diffraction
- 4. Which part of a wave is the highest point in a transverse wav e? a A. Creat B. Trough C. Wavelength D. Amplitude a does.google.com 5. Which type of wave can travel in a vacuum? A. Sound wave B. Water wave C. Seismic wave D. Electromagnetic wave 6. What is the unit of frequency for sound waves? A. Meters per second B. Hertz C. Nanometers D. Seconds
- 10. If a parachutist is dropping at a constant velocity of -1.25m/s If he starts from 850 m above the ground , the amount of time expired before he lands is a) 1.06times 10^3s b) 68.0 s c) 11 min 20 s 1) 17 12
- 8. LD is crossing the river Mallaig in his homemade bathtub boat. He rows, rows . rows his boat due north ar 4.00m/s The river flows gently at 6.00m/s due east and is 360 m across. The direction relative to the shore that LD will go in is a) 48,2^circ b) 56.3^circ c) 41.8^circ d) 33.7^circ
