Problem Statement of Series 1, Year 37
About the Competition Rules How to Write Solutions Results1... Moby Dick
3 points
Some species, such as cetaceans, navigate by echolocation. Let us assume that
a cetacean emits a sound signal through a larynx located precisely between
the ears at a distance
2... train shifting
3 points
Jarda is standing at the end of the platform, waiting for his train to arrive. When the train's first carriage passes him, he discovers
that this is the carriage where he has his seat ticket. At this point, the speed of the train is
3... new bicycle
5 points
A cyclist with the mass
4... truck flip
7 points
Legolas had a dream in which the truck braked so quickly that the container
lifted off the ground and did a somersault over the cab. He wondered if that
was possible, so he tried to do the math. In his model, the entire truck has
a mass of
5... cold water immersion in the summer
10 points
In the winter, Matěj found a
Hint: The thermal conductivity coefficient is the easiest parameter of polystyrene to find.
P... rocket
10 points
Using current technology, how much fuel would it take to carry an object
of mass
E... wipe the paper
12 points
Measure the coefficient of static friction between two sheets of office paper.
Instructions for Experimental TasksS... measuring the time
10 points
- On long-term average, how long does it take for the March equinox to move by one day when using the Gregorian calendar?
- How much does the period of oscillation of a pendulum with a period of
change when its temperature changes by if its rod and a much heavier weight are made out of copper? What processes affect the pendulum when the atmospheric pressure or air humidity changes? - Estimate how long is the shortest “rod” from quartz resonating
at a frequency
. Consider the density of quartz and the modulus of elasticity and the compressive oscillations with one static and the other free to move. - Let's have an isotope
, that changes with a half-life to the isotope . At several places in a sample, we measure the relative isotopic abundance of the parent and child nuclides relative to a different isotope of the child element: , . We assume that the relative abundance of the child element does not change in time. How do we determine the age of the sample? Assume that both isotopes of the element Y are stable and present in original sample and disregard other nuclear transformations.