g A heat engine has a total heat input of 1.3 kJ and a thermal efficiency of 45 percent. How much work will it produce

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

What are atoms of the same element with varying number of neutrons