Answer:
-322.64 J
Explanation:
75 N * cos 125 * 7.5 = -322.64 J
Answer: Several health conditions, your lifestyle, and your age and family history can increase your risk for heart disease. These are called risk factors. About half of all Americans (47%) have at least 1 of 3 key risk factors for heart disease: high blood pressure, high cholesterol, and smoking
Explanation: Have a great day!
Hi alexander it is very true air pollution is only caused by human activity
Sound waves travel faster through <em>solids</em> than they do through gases or liquids. <em>(C) </em>They don't travel through vacuum at all.
Example:
Speed of sound in normal air . . . around 340 m/s
Speed of sound in water . . . around 1,480 m/s
Speed of sound in iron . . . around 5,120 m/s
In a direct current, the electric charge, or current, only flows in one direction. In an alternating current, the electric charge changes periodically.
