Final Exam Flashcards
(24 cards)
One neutron is added to a helium nucleus that results in
Helium (He)
Which is the greater amount of medication measured by mass, 1g or 1000mg?
both the same
The pressure at the bottom of a jug filled with water does NOT depend on…
surface area of the water
An umbrella tends to move upwards on a windy day, principally because…
air pressure is reduced over the curved top surface
Place a 1-kilogram block of iron at 40°C into 1 kilogram of water at 20°C and the final temperature of the two becomes…
less than 30 degrees celcius (water has higher specific heat than iron, so the overall temp will relfect more of the water’s temp)
A Thermos bottle has double glass walls with silver coating on the glass surfaces that face each other. The silver coating reduces energy transfer by…
radiation
When slow-moving water molecules collide they tend to..
stick together
When water vapor changes phases to become water in a cloud, the surroundings become…
warmer
The air pressure in a container of air at 27 degrees celcius will double when heated to…
277 degrees celcius
(27 + 273 = 300k,
300k x 2 = 600k,
600k - 273 = 327)
How long will the string B stretch if string A stretches 4m while holding 10kg of mass?
4m
What is bouyant force on the rock? b) If the container of water reads 10N on the weighing scale, what is the scale reading when the rock is suspended beneath the water? c) What is the scale reading when the rock is released at the bottom of the container?
a) Must have 10 force up and down. 10 down - 8 up = 2N Bouyancy Force
b) 10 force on the scale + 2N Force from rock = 12N total
c) rock (2N) + string (8N) + water with container (10N) = 20N total
Find the temperature increase of ball….
step 1 : mgh/2 = (10kg x 9.8g x 100J)/2 = 4,900
step 2: Q = mcT = 10kg x 450 C iron x 4,900T
step 3: T = 4,900/10 x 450 degrees celcius = 1.09 = 1.1 degrees celcius
f = 400Hz v = 340, find wavelength
v/f = 340/400 = 0.85m or 85cm
If a piece of iron and a cup of water at the same temperature are heated so the internal energy (U) of each doubles…
the iron will have the higher temp
A quantity of water has more entropy when it is…
boiling
A 60 vibrations per seconds wave travels 30 meters in 1 sec. Hz frequency is….
60 Hz and it travels at 30 m/s
Some of a wave’s energy dissipates as heat. In time, this will reduce the wave’s…
amplitude
What is the length of a simple pendelum with a period of 2.0s?
.99
An earthquake generates three kinds of waves: surface waves
t1 = L/v1
t2 = L/v2
∆t = t1-t2 = L/v1 - L/v2
20 = L(1/4 - 1/7)
L = 20/(1/4-1/7)
L = 200km
A standing wave is oscilating at 950Hz on a string, as shown in the figure. What is the wave speed? Wavelength = 0.40m
950Hz x 0.40m = 380m/s
A 340 Hz sound wave travels at 340m/s in air with a wavelength of…
v/f = λ
340/340 = 1m
to estimate the distance in km of a flash of lightning, count the number of seconds between the flash and hearing the accompanying thunder, then divide by…
3
How many octaves exist between 100Hz and 1600Hz?
4
Double the frequency of a musical tone and you have the…
wavelength
