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A 45.7 kg girl is standing on a plank that has a mass of 152 kg. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless supporting surface. The girl begins to walk along the plank at a constant speed of 1.55 m/s relative to the plank.
(a) What is her speed relative to the ice surface?(b) What is the speed of the plank relative to the ice surface?
An ALkaline earth atom has 2 valance electrons. Both can be spin up and spin down. Write the singlet states
Two rooms in your house differ in temperature by 8.5?F. What's the temperature difference in kelvin
A wave with a frequency of 230Hz and a wavelength of 12.9cm is traveling along a cord. The maximum speed of particles on the cord is the same as the wave speed. What is the amplidute of the wave?
A person who is cycling with initial velocity of 12 m/s brakes hard locking wheels they slide to a stop their mass is 70kg and their bike is 5kg. how far do they travel before they stop
You fill up your gas tank in Europe when the euro is worth $1.25 and gasoline costs 1.33 euros per liter. What is the cost of gasoline in dollars per gallon
point a is located at 9i3j4km point b is located at 6i-7j2km. the force on a thin wire from a to b is 500 ib. what
A catapult on a cliff launches a large round rock towards a ship on the ocean below. calculate the value of the angle theta
a charge of 2.0 micro coulomb is located in a uniform electric field of intensity nc. what is the magnitude of the work
questionan ideal gas is placed in a tall vertical cylinder with cross-sectional area a 0.1 m2.nbspa frictionless
A 12.0 m long conveyor belt, inclined at 40.0°, is used to transport bundles of newspapers from the mailroom up to the cargo bay to be loaded on to delivery trucks. Each newspaper has the mass of 1.00 kg, and there are 26 newspapers per bundle. Concl..
A satellite has a mass of 6155 kg and is in a circular orbit 4.76 × 105 m above the surface of a planet. What would be the true weight of the satellite if it were at rest on the planet's surface
A 4.1 g coin sliding to the right at 26.2 cm/s makes an elastic head-on collision with a 12.3 g coin that is initially at rest. Find the final velocity of the other coin
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