The nucleus of the hydrogen atom consists of a single neutron
Indicate whether the statement is true or false
F
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A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T
If the wire experiences a force of 0.60 N, what is the current in the wire? A) 2.0 A B) 1.0 A C) 3.0 A D) 4.0 A E) 5.0 A
A vector is located in the x-y plane. The x- and y-components of this vector are 4.00 m and 3.00 m, respectively. Find the angle that this vector makes with the positive y-axis
A) 53.1° B) 36.9° C) 126.9° D) 22.4° E) 48.6°
A string is wrapped tightly around a fixed pulley that has a moment of inertia of 0.0352 kg ? m2 and a radius of 12.5 cm. An object of mass of 423 g is attached to the free end of the string
With the string vertical and taut, the object is gently released so it can descend doe to the gravitational force exerted on it by Earth. As the object descends, the string unwinds and causes the pulley to rotate, but does not slip on the pulley. What is the speed of the object after it has fallen through 1.25 m? A) 2.00 m/s B) 2.28 m/s C) 1.97 m/s D) 3.94 m/s E) 4.95 m/s
We can apply the equation Ft = change in (mv) to the case of a baseball player striking a pitched ball. To impart the maximum change in momentum, mv, to the ball, the batter hits the ball with the greatest force he can muster and he also
1) extends the time of contact as much as possible by "following through." 2) makes the time of contact as short as possible, thereby increasing the force. 3) none of the above! In the impulse-momentum equation applied to hitting the ball, the "v" represents 4) the velocity of the bat. 5) the velocity of the ball. 6) a vector quantity.