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Suppose a child is riding on a merry-go-round at a distance about halfway between its center and edge. She has a lunch box resting on wax paper, so that there is very little friction between it and the merry-go-round. Which path shown in the sketch will the lunch box take when she lets go? The lunch box leaves a trail in the dust or the merry-go-round. Is that trail straight, curved to the left, or curved to the right? Explain your answer.
In very cold weather, a significant mechanism for heat loss by the human body is energy expended in warming the air taken into the lungs with each breath. How much heat is lost per hour if the respiration rate is 20 breaths per minute
q1. if air drag is negligibly small how fast is sequoia cone moving while it reaches the ground if it dropped from the
To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. What was the raven's speed right after the collision
A charge of +1.00 10-6 C is located 29 cm from a charge of -4.00 10-6 C. What is the magnitude of the force exerted on each charge
1 the equation of motion of a particle in vertical shm is given by y 20 cm sin0.25 rads t. what are the particles a
A stone is thrown horizontally with an initial speed of 7.5m/sfrom the edge of cliff. What is the height of the cliff
The escape speed from a distant planet is 43 km/s. If the acceleration of gravity on the planet surface is 11.0 m/s2, what is the radius of the planet
A small electric car overcomes a 244N friction force when traveling 29.6km/hr. The electric motor is powered by ten 12.0V batteries connected in series and is coupled directly to the wheels whose diameters are 49.0cm. The 281 armature coils are re..
Some of the earliest atomic models held that the orbital velocity of an electron in an atom could be correlated with the radius of the atom. If the radius of the hydrogen atom is 5.29*10 -11 m and the electrostatic force is responsible for the circul..
Two point charges are fixed on the y axis: a negative point charge q1 = -28 µC at y1 = +0.23 m and a positive point charge q2 at y2 = +0.31 m. A third point charge q = +8.7 µC is fixed at the origin. The net electrostatic force exerted on the char..
A tuning fork generates sound waves from a frequency of 246 Hz. The waves travel in opposite directions along a hallway, are reflected by end walls, and return. The hallway is 47.0m long and the tuning fork is located 14.0 m from one end.
A guitar string is 91.00cm long and has a mass of 3.6g. From the bridge to the support post (= L) is 60 cm, and the string is under a tension of 551 N.
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