A 0.50-kg object is attached to an ideal spring of spring constant 20 N/m along a horizontal, frictionless surface. The object oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position
What are (a) the total energy and (b) the amplitude of vibration of the system?
(a) 0.56 J (b) 0.24 m
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A steel rod 55 cm long has a diameter of 30 cm. The compressive strength (the maximum stress it can support without breaking) of this steel is 500 × 106 N/m2. What is the compression force that would break the rod?
A) 3.5 × 107 N B) 2.4 × 107 N C) 1.4 × 108 N D) 4.7 × 108 N E) 8.9 × 108 N
The minimum amount of energy necessary to eject an electron from a metal surface is referred as Planck's constant
Indicate whether the statement is true or false
A rifle is aimed horizontally at the center of a large target 60 m away. The initial speed of the bullet is 240 m/s. What is the distance from the center of the target to the point where the bullet strikes the target?
a. 48 cm b. 17 cm c. 31 cm d. 69 cm e. 52 cm
Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. The number of fringes per unit length on the screen can be halved
A.
.B.
.C.
the wavelength is changed to 
.D.
E.
.