Nail tips exert tremendous pressures when they are hit by hammers because they exert a large force over a small area. what force (in n) must be exerted on a nail with a circular tip of 1.15 mm diameter to create a pressure of 2.63 ✕ 109 n/m2? (this high pressure is possible because the hammer striking the nail is brought to rest in such a short distance.)

2780 N

Explanation:

Pressure is defined as the ratio between the force applied and the area of the surface:

Here we know the pressure:

we also know the diameter of the tip, d = 1.15 mm, so we can calculate the radius

and so the area

And so we can re-arrange the equation to find the force:

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: