# Posts by sake

Total # Posts: 11

1. ### physics

is it possible for the heat to flow even if the internal energies of the two objects are the same? explain. i said yes because the flow of heat depends on an object's temperature and two objects can have the same internal energy but different temperatures. is this right
2. ### physics

so when a hot object warms a cooler object, temperature does not flow between them. but are the temperature changes of the two objects equal?
3. ### physics

when a hot object warms a cooler object, does temperature flow between them
4. ### history

In 1961, President Kennedy backed an invasion of the island by Cuban refugees in the US; it failed. what does it mean to back an incasion
5. ### anatomy

what's the area behind your knees called
6. ### history

until germany's invasion of poland the democratic nations which had been victorious in world war I had observed all these separate aggressions and done little. the league of nations had all but collapsed in the wake of italy's invasion of ethipia. britain and france ...
7. ### physics

i still don't get it. why is the distance x 2 and what does it mean ms for the pulse duration
8. ### physics

a ship sends a snoar pulse of frequency 30kHz and duration 1.0 ms towards a submarine and receives a reflection of the pulse 3.2 s later. the speed of sound in water is 1500 ms-1. find the distance of the submarine from the wavelength of the pulse and the number of full waves ...
9. ### physics

thanks but actually i figured it out by myself!
10. ### physics

a sound wave of frequency 500 hz travels from air into water. the speed of sound in air is 330 m s-1 and in water 1490 m s-1. what is the wavelength of the wave in a)air; b)water
11. ### science

the free-fall acceleration on the surface of the moon is appromimately 1/6 of the free-fall acceleration on the surface of earth. compare the period of a pendumlum on earth with that of an identical pendulum set in motion on the moon