Usain Bolt accelerates at a rate of 3.7 m/s2 and his top speed is 12.7 m/s. How long does it take for him to run the 100m dash
based on these numbers.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas

answer: 31, 5556. 952 seconds