While Ms. Brown's science class is studying changes in particle motion during phase changes, they add a few pieces of dry ice to a flask and cover it with a balloon. After a few minutes they observed the balloon starting to inflate. Predict what will happen if they
put the flask with the inflated balloon onto a hot plate and raise its temperature from room temperature to 40 °C.
A)
No change occurs.
B)
The balloon will deflate,
C)
The dry ice precipitates,
D)
The balloon inflates further.
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Structure and Dean

A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm