A ball thrown vertically upward takes four seconds to rise from the bottom of its path to its highest point. At what time is its instantaneous speed equal to the magnitude of its average velocity for the entire upward motion from bottom to top

If you mix chlorine lithium and nickel together which two elements would be the most reactive

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n