A 95-N force exerted at the end of a 0.32-m long torque wrench produces a torque of 15 N ? m. What is the angle (less than 90°) between the wrench handle and the direction of the exerted force?
A) 30°
B) 24°
C) 36°
D) 42°
A
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A freight train consists of an engine and several identical cars on a level track. Which of the following statements is true?
A. if the train is moving at constant speed, the engine must be pulling with a force greater than the train's weight B. if the train is moving at constant speed, the engine's pull on the first car must exceed that car's backward pull on the engine C. if the train is coasting, its inertia makes it slow down and eventually stop D. if the train is moving at constant speed the engine's pull must be equal to the friction
If the first maximum of one circular diffraction pattern passes through the center of a second diffraction pattern, the two sources responsible for the pattern will appear to be a single source
Indicate whether the statement is true or false
Why must you use the same reference point b g h0 on the spring for each subsequent height measurement?
When light passes through two or more narrow slits, an alternating dark and bright pattern is observed on a screen because of interference
Indicate whether the statement is true or false