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An unknown material has a normal melting/freezing point of -26.3 ° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C °). One-tenth of a kilogram of the solid at -26.3 ° C is put into a 0.143-kg aluminum calorimeter cup that contains 0.095 kg of glycerin. The temperature of the cup and the glycerin is initially 28.3 ° C. All the unknown material melts, and the final temperature at equilibrium is 19.6 ° C. The calorimeter neither loses energy to nor gains energy from the external environment. What is the latent heat of fusion of the unknown material?
J/kg
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
A pilot flying from Honolulu to California flies at an airspeed of 300.0 m/s ("airspeed" - airplane's speed through the surrounding air) with her airplane pointed 67.0 degrees to the east of north. find the magnitude and compass bearingof the airpl..
A pressure as low as P = 8 ? 10-11 Pa has been obtained. Suppose a chamber contains helium at this pressure and at room temperature, Estimate the mean free path
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 28.9N. What is the sample's specific heat
A hunter aims directly at a target (on the same level) 101m away. If the bullet leaves the gun at a velocity of 203m/s, by how much will it miss the target.
Find the change in length of the bridge for an increase in temperature of 10 degree Celcius
On a workday the average decibel level of a busy street is 72.0 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 50 every minute on a weekend, what is the decibel level of street.
It is possible to produce artificial gravity on a space station by having the station rotate. Explain how this would work. What would be some benefits and drawbacks to this approach?
A child sits on the edge of a spinning merry-go-round that has a radius of 2.9 m. What is the child's acceleration
She comes to rest 1.13 m under the surface of the water. Identify the magnitude of the average force that the water exerts on the diver. This force is nonconservative.
Imagine that the cannon from Problem #1 is actually firing into a strong wind, What is the final velocity vector of the ball when it lands
while Jo moves off in the opposite direction at a speed of 0.946m/s. assuming that friction is negligible, find out Al's mass.
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