Bullet G is dropped, from rest, at the same time that another bullet H is fired horizontally from a rifle. If both bullets leave from the same height above the ground, then
A) bullet G hits the ground before bullet H does.
B) both bullets hit the ground at the same time.
C) bullet H hits the ground before bullet G does.
D) not enough information is given to compare when they hit.
B
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Motor oil, with a viscosity of 0.25 N ? s/m2, is flowing through a tube that has a radius of 3.0 mm and is 1.0 m long. The drop in pressure over the length of the tube is 200 kPa. What is the average speed of the oil?
A) 0.80 m/s B) 0.90 m/s C) 1.0 m/s D) 1.1 m/s E) 1.2 m/s
Two bodies, A and B, collide as shown in Figures I and II below
Which statement is true?
a.
They exert equal and opposite forces on each other in I but not in II.
b.
They exert equal and opposite force on each other in II but not in I.
c.
They exert equal and opposite force on each other in both I and II.
d.
The forces are equal and opposite to each other in I, but only the components of the forces parallel to the velocities are equal in II.
e.
The forces are equal and opposite in I, but only the components of the forces perpendicular to the velocities are equal in II
Daisy raises 10.Kg to a height of 2.5 meters in 2.0 seconds. (a) How much work did she do? (b) How much power was expended? (c) If she raises it in 1.0 s rather than 2.0 s, how do the work and power change?
What will be an ideal response?
The splitting of a large nucleus into two smaller nuclei upon absorbing a neutron is nuclear fusion
a. True b. False Indicate whether the statement is true or false