I need full solution A projectile is fired from the ground level with a velocity
of 500 ms-1 at 30° to horizon. What is the least speed with which it could be projected in order to
achieve the same horizontal range ? [g = 10m/s2]

An object has a weight of 500 on earth what is the mass of this object

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?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?