Question 4 Unsaved If element X has 93 protons, how many electrons does it have? Your Answer:

A stone is thrown straight downward with a speed of 20 m/s from the top of a tall building. If the stone strikes the ground 3.0 seconds later, about how tall is the building? A) 45m B) 60m (wrong) C) 90m D) 105 m

Which of the following quantities are unknown? Select all that apply. a. the initial speed of the alpha particle b. the charge of the alpha particle c. the value of the electric potential at the initial position of the alpha particle d.

What is the difference between a hurricane and a typhoon

A box is being pulled by two ropes. Eduardo pulls to the left with a force of 500 N, and Clara pulls to the right with a force of 200 N. The box moves because of the two forces applied to it.

Which statement accurately describes the ultraviolet catastrophe

Summarize Newton's First Law

13. How is 0.00069 written in scientific notation? A. 69 x 10-5 B. 6.9 x 104 C. 0.69 x 10-3 D. 6.9 x 10-4

A 1300 kg sports car accelerates from rest to 95 km/h in 7.4 s. What is the average power delivered by the engine?.

Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push such that the gate does not move.

What is the frequency of 20 mm microwaves? A) 100 MHz B) 400 MHz C) 15 GHz D) 73 GHz E) 98 GHz