The model we have constructed in this chapter neglects feedback effects that might accelerate or brake the warming. It is possible that higher temperatures will yield increased evaporation and increased cloud cover. Will this accelerate or brake the warming compared to the predictions of the model in the text?
A. Accelerate
B. Brake
C. No change
B. Brake
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A particle moves along a circular path having a radius of 2.0 m. At an instant when the speed of the particle is equal to 3.0 m/s and changing at the rate of 5.0 m/s2, what is the magnitude of the total acceleration of the particle?
A. 7.5 m/s2 B. 6.0 m/s2 C. 5.4 m/s2 D. 6.7 m/s2 E. 4.5 m/s2
Young's Modulus: A cable is 100-m long and has a cross-sectional area of 1.0 mm2. A 1000-N force is applied to stretch the cable. Young's modulus for the cable is 1.0 × 1011 N/m2. How far does the cable stretch?
A. 0.010 m B. 0.10 m C. 1.0 m D. 10 m
Projectile Motion: A celebrating student throws a water balloon horizontally from a dormitory window that is 50 m above the ground. It hits the ground at a point 60 m from the building without appreciable air resistance.(a) What will be the horizontal component of the velocity of the balloon just before it hits the ground?(b) What will be the magnitude of the vertical velocity of the balloon just before it hits the ground?
What will be an ideal response?
Three point charges are placed on the x-axis. A charge of +2.0 ?C is placed at the origin, -2.0 ?C to the right at x = 50 cm, and +4.0 ?C at the 100 cm mark
What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?