Recent content by Silverbolt

[FONT="Comic Sans MS"]Question [FONT="Comic Sans MS"]In many department stores, large plane mirrors have been placed high on walls or on projections from ceilings. These may be one-way mirrors that are designed to allow one-way surveillance of the store. From one side, this surface looks...

A heat transfer of 9.5 x 10^5 J is required to convert a block if ice at -15°C to water at 15°C. What is the mass of the block of ice? So do I have to use the equation; Q= mcΔT ? and Q= mL ? And if so how do I use it?

Thanx!

This is what I think I would do: So I would us the potential energy equation: P.E.=mgh so --> P.E.= (.0976 kg)(9.8m/s^2)( 4.57m) P.E. = 4.371J With this I'll use the equation: Q=mcT 4.371J =(.0976kg)(128 J/Kg(°C) )( Tf-20°C) Ans so I'll solve for TfSO IS THIS RIGHT?? PLEASE HELP

A 97.6-g lead ball with an initial temperature of 20°C, is dropped from rest from a height of 4.57 m. The collision between the ball and ground is totally inelastic. Assuming all the ball's kinetic energy goes into heating the ball, find its final temperature. PLEASE HELP ME UNDERSTAND THIS...

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So if I include the negative sign everything else will be correct?

At a local county fair, you watch as blacksmith drops a 0.050-kg iron horseshoe into a bucket containing 25.0 kg of water. If the initial temperature of the horseshoe is 450°C, and the initial temperature of the water is 23°C, what is the equilibrium temperature of the system? Here is...

A cube of osmium with a volume of 166 cm³ is placed in fresh water. The cube's apparent weight is 35.0 N. What is the density of osmium?This is what I did: I converted force to mass by : 35 N / 9.8 = 3.57 kg then changed the 166 cm³ to m³ which is : .000166 m³ After that i divided the mass...

A 2.0-kg ball is traveling east at 8.0 m/s when it has a perfectly elastic head-on collision with a 3.0-kg ball traveling west at 10.0 m/s. What are the final velocities of the two balls? Please help I don't know where to start

A 2.0kg blob of clay traveling to the north at 6.0m/s inelastically strikes a 3.0kg blob of clay traveling south at 4.0m/s. What is the final velocity of the two blobs after the collision? This is what I think: Since both have the same momentum before striking together, would their final...

mv final-mv inital

p=mv ?

[FONT="Comic Sans MS"] A 3.0-kg ball, which is dropped, strikes the ground with a velocity of 16.0 m/s and rebounds with a velocity of -12.0 m/s. What is the change in momentum?

Is this problem unsolvable?