The lug nuts on a car wheel require tightening to a torque of 90 N ? m. If a 30-cm long wrench is used, what is the magnitude of the minimum force required using the wrench?
A) 30 N B) 15 N C) 300 N D) 150 N
C
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A foul ball is hit straight up into the air with a speed of 30.0 m/s. (a) Calculate the time required for the ball to rise to its maximum height. (b) Calculate the maximum height reached by the ball
(c) Determine the time at which the ball pass a point 25.0 m above the point of contact between the bat and ball. (d) Explain why there are two answers to part (c).
The description large somewhat dirty snowball model fits the physical structure of ____________________
Fill in the blank(s) with correct word
In 1960, the scientist named __________ proposed the concept of seafloor spreading
a. Andrija Mohorovicic b. Harry Hess c. Alfred Wegener d. None of the above
A 4.0 cm tall object is placed 60 cm away from a converging lens of focal length 30 cm. What is the nature and location of the image?
A) The image is real, 2.5 cm tall, 30 cm on the same side as object. B) The image is virtual, 2.5 cm tall, 30 cm on the other side of the lens. C) The image is virtual, 2.0 cm tall, 15 cm on the other side of the lens. D) The image is virtual, 4.0 cm tall, 60 cm on the same side as object. E) The image is real, 4.0 cm tall, 60 cm on the other side of the lens.