Question

железнодорожный рельс длиной 12.5м имеет массу 625 кг.Рельсовая колея это два рельса железнодорожного пути. Какова масса рельсовой колеи от москвы до: а) казани (793км) б) свердловска (1759км) в) красноярска ( 3959 км) г) владивостока ( 9297 км) с каким коэффициентом масса рельсовой колеи пропорциональна её (в км)

Answer 1

На 1м рельса приходится 50 кг
тогда на километр приходится 50000кг
тогда
а)793×50000×2=79300тонн
б)1759×100000=1755900тонн
в)395900тонн
г)929700тонн

Answer 2

Calculation of the Mass of Railway Track

To calculate the mass of the railway track from Moscow to different cities, we need to determine the length of the track and the mass per unit length of the rail.

Given: - Length of a single rail = 12.5 m - Mass of a single rail = 625 kg

To find the mass of the railway track, we need to consider that a railway track consists of two rails. Therefore, the total mass of the track will be twice the mass of a single rail.

Let's calculate the mass of the railway track from Moscow to different cities:

a) Moscow to Kazan (793 km): - Length of the track = 2 * 793 km = 1586 km - Mass of the track = 2 * (mass of a single rail) * (length of the track) - Mass of the track = 2 * 625 kg * 1586 km

b) Moscow to Sverdlovsk (Yekaterinburg) (1759 km): - Length of the track = 2 * 1759 km = 3518 km - Mass of the track = 2 * (mass of a single rail) * (length of the track) - Mass of the track = 2 * 625 kg * 3518 km

c) Moscow to Krasnoyarsk (3959 km): - Length of the track = 2 * 3959 km = 7918 km - Mass of the track = 2 * (mass of a single rail) * (length of the track) - Mass of the track = 2 * 625 kg * 7918 km

d) Moscow to Vladivostok (9297 km): - Length of the track = 2 * 9297 km = 18594 km - Mass of the track = 2 * (mass of a single rail) * (length of the track) - Mass of the track = 2 * 625 kg * 18594 km

Now, let's calculate the proportionality factor between the mass of the track and its length:

e) Proportionality factor: - The proportionality factor is the ratio of the mass of the track to its length. - Proportionality factor = (mass of the track) / (length of the track)

Please note that the calculations above assume a uniform mass per unit length along the entire track. In reality, the mass of the track may vary due to factors such as different rail types, track configurations, and maintenance practices.

Please wait a moment while I calculate the values using the given information.