All three types of particles found in atoms are electrically charged
a. True
b. False
Indicate whether the statement is true or false
False
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A driver, traveling at 22. m/s, slows down her 1500. kg car to stop for a red light. What work is done by the friction force against the wheels?
What will be an ideal response?
An electron is sent at high speed toward a gold nucleus (charge +79e). What is the electrical force acting on the electron when it is 3.0 × 10^-13 m away from the gold nucleus? (e = 1.6 × 10^-19 C, ke = 8.99 × 10^9 N•m2/C2)
a. 2.1 × 10^-6 N c. 0.20 N b. 2.0 × 10^-4 N d. 20 N
Constant Acceleration Kinematics: In a ballistics test, a bullet moving horizontally with a speed of 500 m/s strikes a sandbag and penetrates a distance of 10.0 cm.(a) What is the magnitude of the average acceleration of the bullet in the sandbag?(b) How many milliseconds does it take the bullet to come to rest in the sandbag?
What will be an ideal response?
What evidence supports the hypothesis for a vast, deep ocean which once occupied what is now the northern plains of Mars?
A) many of the largest flood channels appear to have drained into the northern plains B) geographic features that look like ancient shorelines C) that the rock along the proposed shoreline is sedimentary rather than volcanic D) all of these are evidence