Which of the following objects never appears to exhibit retrograde motion in our sky?
A) The Sun
B) Venus
C) Mars
D) Jupiter
E) Saturn
A) The Sun
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Electric Field of Point-Charges: Two tiny particles having charges +20.0 ?C and -8.00 ?C are separated by a distance of 20.0 cm. What are the magnitude and direction of electric field midway between these two charges? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 25.2 × 106 N/C directed towards the negative charge B. 25.2 × 106 N/C directed towards the positive charge C. 25.2 × 105 N/C directed towards the negative charge D. 25.2 × 105 N/C directed towards the positive charge E. 25.2 × 104 N/C directed towards the negative charge
A car with good tires on a dry road can slow down at a steady rate of about 5.0 m/s2 when braking. If a car is initially traveling at 55 mi/h (a) how much time does it take the car to stop? (b) what is its stopping distance?
What will be an ideal response?
A convex mirror with a focal length of –28.0 cm forms an image 11.3 cm behind the surface. If the object height is 2.00 cm what is the image height?
a. 1.19 cm b. 3.35 cm c. 1.35 cm d. 2.00 cm e. 0.807 cm
If C = 10 ?F, what is the equivalent capacitance for the combination shown?
a.
7.5 ?F
b.
6.5 ?F
c.
7.0 ?F
d.
5.8 ?F
e.
13 ?F