• ### Which one is denser? Diamond or crown glass? And why?

37 mins ago
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• ### Physics Question: Work and Springs?

1 hour ago
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• ### Calculate the minimum energy needed to excite the HCL molecule into rotation.?

The rotation of a 1H35Cl molecule can be pictured as the orbital motion of the hydrogen atom at a distance of 127 pm from the stationary chlorine atom. Suppose that the molecule rotates only in a plane. Calculate the minimum energy needed to excite the molecule into rotation. What, apart from 0, is the minimum angular momentum of the molecule?
1 hour ago
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• ### 500 pounds falling 6 ft on to someone shoulders how much force or impact would that be.?

2 hours ago
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• ### Calculate the broadcast wavelength of the radio station 101.9 FM.?

A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz (MHz), where 1MHz=106Hz. Express your answer in meters to four significant figures.
2 hours ago
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• ### Calculate the x coordinate of the center of mass of the metal plate.?

2 hours ago
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• ### Physics Homework Help?

A ball with an initial velocity of 9.6 m/s rolls up a hill without slipping. -Find the height - Repeat the calculation for the same ball if it slides up the hill without rolling
3 hours ago
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Two football players collide head-on in midair while chasing a pass. The first player has a 90.5 kg mass and an initial velocity of 6.10 m/s, while the second player has a 125 kg mass and initial velocity of -5.4 m/s. What is their velocity (in m/s) just after impact if they cling together? (Indicate the direction with the sign of your answer.)
3 hours ago
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• ### Physics Homework Help please?

A ball with an initial velocity of 9.6 m/s rolls up a hill without slipping. Treating the ball as a spherical shell, calculate the vertical height it reaches, in meters. Do you use the equation: 1/2(mvi)^2 + 1/2(Iw)^2 + mghi = 1/2(mvf)^2 + 1/2(Iw)^2 + mghf - How do you plug into the equation if there is only one given variable?
3 hours ago
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• ### How is the calcium crystal experiment used to illustrate the multiple refractive index of calcite crystal?

3 hours ago
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• ### Physics 1 (Calculus-Based) Homework Help?

An automobile with tires that have a radius of 0.260 m travels 88000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?
4 hours ago
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• ### Can i please get hlelp i dont get where i messing up?

Light pollution is caused by many lights being on in a concentrated area.Think of the night sky in the city compared to the night sky in the country. Light pollution can be a problem in cities, as more and more bright lights are used in such things as advertising and office buildings. The intensity of illumination is inversely proportional to the... show more
4 hours ago
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• ### If m1>m2 and m2 is 12 kg and the system is accelerating at 4.3 m/s/s, what is the mass of m1?

4 hours ago
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• ### Physics Kinematics Problem?

A forester aims his gun at a hole in a tree that is 8.0 m above the gun. The base of the tree is 18 m away. The speed of the paintball as it leaves is 50 m/s. How far below the knothole does the paintball strike the tree? I keep getting 0.72 m below the knothole, which is incorrect
4 hours ago
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• ### Physics help? Conservation of Energy and Momentum?

What is the maximum angle hill that an SUV (2430 kg) with an attached load of 1317 kg can climb at a speed of 59.5 km/h if this SUV has an engine marked as 208.7 hp (hp is the abbreviation for horsepower)? Assume that the force of air resistance is F=0.3 v^2 (for a force in Newtons and a speed in m/s) and take 1 hp = 745.7 W. Express your answer in... show more
5 hours ago
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sphere of mass 3.0x10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 37o with the vertical. Find (i) the magnitude of the push and (ii) the tension in the cord.
5 hours ago
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projectile is fired with initial speed v at an angle 300 above the horizontal from a height of 40m above the ground. The projectile strikes the ground with a speed of 1.2v.Find v
5 hours ago
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• ### Creating a formula for a sales/warehouse order?

So a truck enters a warehouse to pick up an order. An order consists of Pallets, "Picks", and "SKU's". a pallet is full of cartons of an item (i.e a pallet of lettuce cartons). A pick is when you take one carton from the intial full pallet to be removed, or replaced with another item (i.e i need a pallet of lettuce but... show more
5 hours ago
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• ### Physic is nuts Help?

The velocity of a bicycle is changed from -1.2 m/s to -6.5 m/s during 25 mins.what is its acceleration ?
6 hours ago