Suppose you have two meter sticks, one made of steel and one made of invar (an alloy of iron and nickel), which are the same length (1.00 m) at 0°c. the coefficients of volume expansion for steel and invar are 3.6 × 10-5 /°c and 2.7 × 10-6 /°c respectively. what is their difference in length, in meters, at 20.5°c ? repeat the calculation for two 30.0-m-long surveyor’s tapes

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction