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Starting from rest, a runner at a track meet reaches a speed of 9.6 m/s in 1.5 s. How far does she run during this time, assuming her acceleration is uniform?
An elephant that has a mass of 7000 kg evenly distributes her weight on all four feet. estimate the pressure on each foot
A 10 kg block is allowed to slide down a frictional incline for a length of 10 m on an incline of 35. How long is the block in the air
A wheel (radius = 0.20 m) is mounted on a frictionless, horizontal axle. A light rope wrapped around the wheel supports a 0.50-kilogram object, as shown below. When released from rest, the object falls with a downward acceleration of 5.0 m/s2. What i..
a certain airplane can accelerate on the runway at a rate of 2.5 ms2 and must attain a speed of 30 ms in order to take
Two stationary positive point charges, charge 1 of magnitude 3.45 nC and charge 2 of magnitude 1.50 nC, are separated by a distance of 52 cm. An electron is released from rest at the point midway between the two charges, and it moves along the lin..
A closed system consists of 4 objects. Initially, object A has 137 J of energy, object B has 158 J of energy, object C has 127 J of energy, How much energy does object D have
A Carnot engine operating between a warmer unknown temperature and a reservoir of boiling helium at 1.76 K has an efficiency of 56%. What is the warmer temperature
A 1.9-kg mass attached to a spring is displaced 7.6 cm from the equilibrium position. What is the energy of the motion when the mass passes through the equilibrium position
A dentist's drill starts from rest. After 2.70 s of constant angular acceleration it turns at a rate of 2.4 104 rev/min. Find the drills angular acceleration
A projectile is fired in such a way that its horizontal range is equal to 14 times its maximum height. What is the angle of projection
The Earth's radius is about 4000 miles. Kampala, the capital of Uganda, and Signapore are both nearly on the Equator. What is the plane's angular velovity with respect to the Earth's durface
question an object is 13 cm in front of a diverging lens with a focal length of 15 cm. use ray tracing to determine the
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