# What is the CSA of sphere?

Table of Contents

## What is the CSA of sphere?

Surface area (TSA) = CSA = 4πr2. Hemisphere : Curved surface area(CSA) = 2 π r2. Total surface area = TSA = 3 π r2.

## How do you find depth with time?

One method for determining the depth of a well is to drop a stone into it and then measure the time it takes until the splash is heard. If d is the depth of the well (in feet) and t 1 t_{1} t1 the time (in seconds) it takes for the stone to fall, then d = 16 t 1 2 , d=16 t_{1}^{2}, d=16t12, so. t_{1}=\sqrt{d} / 4 .

## How deep is a shallow well?

approximately 10 to 30 feet

## How deep is the well physics?

What is the depth of the well? The speed of sound in air is roughly 330 – 340 m/s. If it takes 3 s for the sound to travel up the well, then it’s depth is roughly 1.0 km.

## How do you find time with speed and depth?

Answer: Use the following formula for measuring ocean depth. D = V Times 1/2 T D = Depth (in meters) T= Time (in seconds) V = 1507 m/s (speed of sound in water) Calculate the depth foe each of the times given below, using the formula above.

## How deep is a 4 second drop?

Let’s say you meant four seconds after DROPPING it, which is a more interesting problem. So the stone falls for some amount of time, and then the sound wave comes back to your ear, and the whole thing takes four seconds. This gives you a well depth of ~70.29 meters.

## How far does a person fall in 6 seconds?

180 meters

## How far can you fall in DND?

In the world of D&D 5e, you fall 500ft in 6 seconds (a round). Assuming of course you do not hit the ground before then. You take damage if you fall further than 10ft. Every subsequent 10ft is worth 1d6 of bludgeoning damage.

## How do you calculate fall from height?

Find the free fall distance using the equation s = (1/2)gt² = 0.5 * 9.80665 * 8² = 313.8 m . If you know the height from which the object is falling, but don’t know the time of fall, you can use this calculator to find it, too!

## What is the equation for height?

The height of the object as a function of time can be modeled by the function h(t) = –16t2 + vt + h, where h(t) is the height of the object (in feet) t seconds after it is thrown.

## How do you calculate fall?

FALL = GRADIENT X DISTANCE For example, calculate the fall in a 50 metre section of foul water pipework if the gradient is to be 1 in 80. A gradient of 1 in 80 is converted to a number instead of a ratio.

## What is gravity’s formula?

The formula is F = G*((m sub 1*m sub 2)/r^2), where F is the force of attraction between the two bodies, G is the universal gravitational constant, m sub 1 is the mass of the first object, m sub 2 is the mass of the second object and r is the distance between the centers of each object.

## What is the time formula?

To solve for time use the formula for time, t = d/s which means time equals distance divided by speed.

## What is 9 hours and 15 minutes as a decimal?

To convert to decimal hours, add (minutes ÷ 60) to the hours number. So, 9 hours 15 minutes is 9 + 15 ÷ 60 = 9.25 hours. To convert to minutes, simply multiply the hours by 60 and add the minutes. So, 9 × 60 + 15 = 555 minutes.