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Q. A 4.0 kg iron ball at 225 degrees celceious is placed in a container of liquid water at 4 degrees celcious. When the system reaches thermal equilibrium, its temperature is 45 degrees celcious. What is the mass of water in the container?
Q. A loudspeaker of mass 20 is suspended a distance of 2.00 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 2.90.
A 9.0 Kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to right of point A. What is the velocity of the box just be..
What would be the equilibrium temperature when a 256 g block of copper at 314 °C is placed in a 140 g aluminium calorimeter cup containing 827 g of water at 11.5 °C.
A hiker's trip consists of three segments. Path A is 9km long heading 60.0° north of east. Path B is 6.0km long in a direction due east. Path C is 5.0 km long heading 315° counter clockwise from east.
In photo like the Hubble Deep Field, we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives.
A person of mass 72 stands at the center of a rotating merry-go-round platform of radius 3.40 and moment of inertia 950. The platform rotates without friction with the angular velocity 0.95. The person walks radially to the edge of the platform.
A hydrogen molecule with an initial velocity of 1200m / s makes a collision with a molecule of oxygen at rest. The reason for the masses of molecules is mO / mH = 16. What are the speeds of the molecules after collision.
What is the smallest distance required to stop the plane
In fact, the increased normal force at these large angles makes force of friction too large to move the lawnmower at all.
What should the charge (sign and magnitude) of a particle of mass 1.487 be for it to remain stationary while placed in a downward-directed electric field of magnitude 630.
Two negative and two positive point charges (magnitude = 3.64mC) are positioned on opposite corners of a square (each side = 0.155 m).Determine the magnitude of the force on each charge.
A diverging lens (f = -12 cm) is located 20 cm to the left of a converging lens (f = 35.0 cm). A 3.00 cm tall object stands to the left of the diverging lens, exactly at its focal point.
Two identical positive charges exert a repulsive force of 6.6 x10-9 N when separated by a distance of 5.4 10-10 m. what is the charge of each.
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