Michael and Misty are standing motionless together on the ice at the center of a very slippery frozen pond. Michael (mass 75. kg) pushes Misty (46. kg), giving her an acceleration of 1.8 m/s2 for 0.17 s while they were in contact
(a) What is Michael's acceleration?
(b) Who exerts the greater force on the other?
(c) What is Michael's speed relative to Misty?
(a) 1.1 m/s2
(b) neither
(c) 0.49 m/s
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Scientists believe Saturn's moon Phoebe originated from a ____
a. large impact on Titan broke off a piece b. captured Kuiper belt object c. captured asteroid from the asteroid belt d. planetesimal that did not differentiate e. Galilean moon with an orbit that crossed into Saturn's orbit
A 10 kg bomb is moving NORTH with a velocity of 4.0 m/s. It explodes into three fragments: a 5.0 kg fragment moving WEST with a speed of 8.0 m/s, a 4.0 kg fragment moving EAST with a speed of 10 m/s, and a third 1.0 kg fragment. What is the velocity of the third fragment?
A. zero B. 40 m/s NORTH C. 40 m/s SOUTH D. none of these answers are correct
A galvanometer has a coil with a resistance of 24. ?. A current of 180. ?A causes full-scale deflection. If the galvanometer is to be used to construct an ammeter that deflects full scale for 10.0 A, what shunt resistor is required?
What will be an ideal response?
A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?
a. 3.2 mT b. 2.8 mT c. 2.4 mT d. 3.6 mT e. 3.0 mT