Physics, 16.03.2020 21:57 keshaayro8566
A 79.9 kg wood board is resting on very smooth ice in the middle of a frozen lake. A 43.5 kg boy stands at one end of the board. He walks from one end of the board to the other end with a velocity of 1.51 m/s relative to the ice in the positive direction. What is the velocity of the board relative to the ice?
Answers: 3
Another question on Physics
Physics, 21.06.2019 21:00
State the right hand rule of the direction of magnetic field in a conductor carrying current
Answers: 1
Physics, 22.06.2019 06:40
Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?
Answers: 2
Physics, 22.06.2019 11:00
The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.
Answers: 3
You know the right answer?
A 79.9 kg wood board is resting on very smooth ice in the middle of a frozen lake. A 43.5 kg boy sta...
Questions
Mathematics, 20.11.2020 03:50
Mathematics, 20.11.2020 03:50
French, 20.11.2020 03:50
Computers and Technology, 20.11.2020 03:50
Mathematics, 20.11.2020 03:50
Health, 20.11.2020 03:50
Biology, 20.11.2020 03:50
English, 20.11.2020 03:50
Spanish, 20.11.2020 03:50
History, 20.11.2020 03:50
