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A rocket powered sled accelerates from rest with fix acceleration. After t=10sec it has traveled a distance x=400meter. Calculate what is its speed at this point?
When a 1.1 kg mass is hung from a spring it is found to stretch by 11 cm. The spring is stretched an additional 5 cm and released. What is the maximum potential energy
Honeybees acquire a positive charge while flying through the air. The rapid motion of the wings through the air provides the "friction" to strip charges off the bee, find the strength of the electrostatic force on the pollen grain
Soft drinks are commonly sold in aluminium containers. How a lot of such containers are thrown away or recycled each year by U.S. consumers.
two speakers one directly behind the other are each generating a 522-hz sound wave. what is the smallest separation
A hockey puck impacts a goalie's plastic mask horizontally at 118 mph and rebounds horizontally off the mask at 50mph. with what speed will the goalie move
A projectile is launched at an angle of 60.3 degrees with the horizontal (x axis) at some unknown velocity. What is the object's vertical displacement at this time in meters
a harvest mouse can detect sounds as quiet as -10 . suppose you are sitting in a field on a very quiet day while a
Water is flowing through a pipe with a constriction. The area of the narrow section is one-half the area of the wide section. what is the velocity of the fluid in the narrow section
2.2 mol of neon gas is initially at a pressure of 1.8 atm and a temperature of 253oc. i if the gas is cooled at
The magnetic field of an electromagnetic wave in a vacuum is Bz = ( 3.5 muT) sin ( 1.6×10^7 x - 2pi f t) , What is the wave's electric field amplitude
A 115.29 g ice cube at -11°C is placed in an aluminum cup whose initial temperature is 79°C. What is the mass of the cup
A highway curve with a radius of 400 m is banked properly for a car traveling 80 km/h. how much sideways force must the tires exert against the road if the car does not skid
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