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A worker pushes horizontally on a large crate with a force of 185 N, and the crate is moved 4.4 m. How much work was done?
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consider the bohr model of the one ecectron atom Be+3, calculate the radius,in nm,of ground state orbital
A 600 gram particle (initially at rest at the origin) is subjected to a force of F=15i+20j (N), calculate the average power produced by this force
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40-kg child sits on the other end. How long is the beam
A rifle is aimed horizontally at a target 58 away. The bullet hits the target 2.5 below the aim point. What was the bullet's flight time? What was the bullet's speed as it left the barrel?
A typical car battery is composed of six, 2.1 V cells arranged in series to have an Emf of 12.6 V. How many electrons pass through the starter motor
A bat emits a sound whose frequency is 70.9 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 40.4 oC, find the wavelength of the sound
A rod has a linear density ? = 3x, where x is the distance along the rod, What is the coordinate of the center of mass of the rod
A charge q = -6.0 µC is moved 0.25 m horizontally to point P in a region where an electric field is 250 V/m directed vertically, as shown. What is the change in the electric potential energy of the charge?
The water comes out of the heads at an angle of 35o to the horizontal and covers a radius of 7.0 m. What is the velocity of the water coming out of each sprinkler head
What is the fundamental resonant frequency of the air column if the velocity of sound in the air is 340 m/s.
A paperweight, when weighed in air, has a weight of W = 16.1 N. When completely immersed in water, Find the volume of the paperweight
A 50.0-kg child stands at the rim of a merry-go-round of radius 1.75 m, rotating with an angular speed of 3.10 rad/s. What is the child's centripetal acceleration
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