Physics Answers

The swordfish is the fastest of all fish. If it accelerates at a rate of 4.0 m / s2 for 1.7 s from its initial speed of 42 km / h, what is its final speed?

1. The body with mass m = 100kg makes uniform movements. How fast was it in that case? V =?

2. Determine Ek. of water with volume V = 3m3, if it moves with speed v = 72km / h.

3. A bucket of water with volume V = 5l is taken out of the well where approximately the work is done of A = 450J. How low is the water surface of the well? (For acceleration take g = 10 m / s2)

4. What impression does the iron cube with ribs a = 4cm make on the table? P =?

5. How fast does the body fall to the ground if after time t = 10s it hits the surface of Earth?

6. The cart is released across the sloping plane. In the table are presented corrosion speed at certain moments of time. How much the rush of the cart? t (s) = 0, 1, 2, 3 v (m / s) = 0, 1.6, 3.2, 4.8

In a nuclear reactions, the mass of the products was determined to be less considerable than the mass of the reactants. Explain 

A U-Tube contains some mercury of a relative density of 13.6, kerosine of a relative density of 0.8 is poured into one arm of the U-Tube until the height of mercury in that arm is reduced by 1.5cm. Calculate the height of kerosine?

Find the equivalent capacitance.

C1=2.0 µF, C2=2.5 µF, C3=4.5 µF, C4=7.5 µF, C5=5.0 µF

Find the equivalent capacitance.

C1=5.0 µF, C2=3.5 µF, C3=8.0 µF, C4=1.5 µF, C5=0.75µF, C6=15 µF

Prime takes a trip in spaceship to a distant station (distance L = 1 light year) at uniform speed (v=0.8c). 

After reaching the distant station, Prime takes a return spaceship to meet Unprime  in Ahmedabad. Explain who is younger after this journey: Prime or Unprime, and  by how many years? Use units of distance as light year and that of time as year.

Suppose two stars obey1mass luminosity relationship.one star is four times as massive as the other.how do the luminosities of the two stars compare??

The distance between maxima and minima of a standing wave is

A material has conductivity of 10-2 mho/m and a relative permittivity of 4. The frequency at which conduction current in the medium is equal to displacement current is