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A 20 kg child is riding a 5.4 kg bike with a velocity of 5.4 m/s to the northwest. a)What is the total momentum of the child and the bike together? Answer in units of kg · m/s b) What is the momentum of the child? Answer in units of kg · m/s c) What is the momentum of the bike? Answer in units of kg · m/s
questiona hunter wishes to cross a river that is 2.5 km wide and that flows with a speed of 4.8 kmh. the hunter uses a
Suppose a heat engine has an efficiency of 0.248 and produces 1.88×10^4 J of work. How much energy is pulled in from the hot reservoir
q1. assume that you are walking perpendicularly with a velocity of 0.90 ms toward a stationary plane mirror. what is
in a Tom's double-slit experiment using 549nm light, a thin piece of plexiglass of refractive index 1.53 covers one of the slits. what is the minimum thickness of the plexiglass
While taking photographs in Death Valley on a day when the temperature is 58.0°C, What current does he register there if the temperature is -88.0°C
A uniform wooden plank of mass 15kg and total length 10m rests on two supports. Find the forces of the two supports on the plank
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release
A weather vane initially at rest has a moment of inertia of 0.122 kg · m2 about its axis of rotation, Find the angular velocity of the weather vane just after it is struck
A certain atom of has 89 protons. Assume that the nucleus is a sphere with radius 7.25 fm and with the charge of the protons uniformly spread through the sphere. At the nucleus surface what is the magnitude of the electric field produced by the pr..
A group of particles is traveling in a magnetic field of unknown magnitude and direction. What is the direction of the magnetic field
Point charges of 6.2*10^-8 C and -6.4*10^-8 C are placed 72 cm apart. A third point charge of 6.3*10^-8 C is placed half way between the first two point charges
An electron is accelerated horizontally from rest in a television tube by a potential difference of 25,000 V. At what angle will the electron be traveling after it passes between the plates
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