A shot-putter moves his arm and the 6.00-kg shot through a distance of 1.25 m, giving the shot a velocity of 8.20 m/s from rest. Find the average force exerted on the shot during this time
a. 323 N
b. 161 N
c. 118 N
d. 12.7 N
e. 252 N
b
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Lens-Maker Formula: As part of a piece of optical apparatus to be used in air, you need to design a thin lens having faces with radii of curvature of magnitude 24 cm each. When an object 32 mm tall is placed 30 cm from this lens, it must form a real image 60 cm from the lens.(a) What must be the index of refraction of the lens material?(b) What is the height of the image of the object? Is it upright or inverted; is it real or virtual?
What will be an ideal response?
Suppose an object is moving in a straight line at 50 mi/hr. According to Newton's first law of motion, the object will
A) continue to move in the same way forever, no matter what happens. B) continue to move in the same way until it is acted upon by a force. C) continue to move in a straight line forever if it is in space, but fall to the ground if it is on Earth. D) eventually slow down and come to a stop.
The Concorde's exterior is made of aluminum, which has a coefficient of linear expansion of 24 × 10-6 K-1. At 15°C, the Concorde measures 62.1 m in length
When the plane is in flight, friction with the air increases the temperature of the exterior skin to 200°C. What is the change in the length of the outer skin of the Concorde? A) 20 cm B) 24 cm C) 28 cm D) 32 cm E) 36 cm
If you face a cliff and give a shout, you will hear an echo. Are the sound waves of the echo inverted (A) or upright (B) compared to the waves of your original shout?
A. Inverted B. Upright