A stone falls from ledge and takes 16 seconds to hit ground. The stone has an original velocity 0 m/s, How tall is the ledge?

the answer to that is 4100 feet

a=(vf-vi)/t solve for tsolve for vi solve for vf

A = (vf - vi) / t <== call this the "given equation"=====================================For t :Multiply each side of the given equation by 't' : A t = (vf - vi)Divide each side by 'A' : t = (vf - vi) / A=====================================For vi :Multiply each side of the given equation by 't' : A t = (vf - vi)Subtract ' vf ' from each side: A t - vf = -viMultiply each side by -1 : vf - A t = vi=====================================For vf :Multiply each side of the given equation by 't' : A t = (vf - vi)Add ' vi ' to each side: A t + vi = vf

How do you work this problem?

-- Calculate how much distance was covered during stage (a).-- Calculate how much distance was covered during stage (b).-- Calculate how much distance was covered during stage (c).Add the three distances. Their sum is the distance between the start point and the end point. That's the 'displacement' .

An aircraft has a liftoff speed of 33 m/s. what minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240m? show work.

We will use simple formula for velocity with constant acceleration.[tex]v=v0+at[/tex] and formula for path [tex]x=x0+v0t+ \frac{1}{2}a t^{2} [/tex]where:v0 - initial velocitya - constant accelerationt- timex - pathx0 - initial positionv0, and x0 are equal to 0 in this case, so we can simplify our formula to[tex]v=at[/tex] and [tex]x= \frac{1}{2}a t^{2} [/tex]We can modify first formula to get time[tex]t= \frac{v}{a} [/tex] and substitute it to second formula.[tex]x= \frac{1}{2}*a \frac{ v^{2}}{ a^{2} } = \frac{1}{2} \frac{ v^{2} }{a} [/tex] Now we can find acceleration[tex]a= \frac{1}{2} \frac{ v^{2} }{x} =2.27[/tex] m/s

What is a scale on a map?

A map is almost always smaller than the place it describes. If a map of the US were drawn in its actual size, it would be 3,000 miles wide, and very difficult to fold. ... The scale of the map is the ratio of a distance on the map to the same distance on the real thing. ... If the map scale is 1 : 50000, then 1 foot on the map shows things that are actually spread over 50000 feet in the real city or field.

The force between a pair of 0.001 C charges is 200 N. What is the distance between them?

From Columb's Law which describe the electrostatic interaction.The formula is given and looks as follows [tex]F=k \frac{|q1*q2|}{r^{2} } [/tex]where:F is force acting between charges,q1 - charge one given in columbs,q2 - charge two given in columbs,r - distance between charge in metersk - constantFirst, we have to convert out formula to get r.[tex]F=k \frac{q1*q2}{r^{2} } [/tex]Now we multiplaty by [tex]r^{2} [/tex] both sides of equation[tex]F* r^{2} =k*|q1*q2|[/tex]Now we devide both sides by F[tex] r^{2} =k \frac{|q1*q2|}{F} [/tex]Next step is take square root[tex]r= \sqrt{k \frac{|q1*q2|}{F}} [/tex]We have all date, we can subsitute it to our formula [tex]r= \sqrt{k* \frac{|q1q2"}{F} } = \sqrt[2]{8.9* 10^{9* \frac{0.001*0.001}{200} }} = 6.67 [m][/tex]

A crime suspect fled the scene when police officers entered the building. How far could he run in 10 minutes if he can run 5 miles per hour?

(5 mi/hr) x (1hr/60min) x (10min) = 5 x 10 / 60 = 5/6 mile(5/6 mile) x (1,760 yd/mile) = 1,466 and 2/3 yards

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg)?

F= ma31-mg = m(-2.5m/s2)31= mg-2.5 m31 = m*(9.8m/s2 -2.5 m/s2)31 = 7.3 mm = 31/7.3m = 4.25 kg

Suppose that 2 scientists use different measurement systems in their work. What problems might arise if they shared their data?

In assumption that there were two scientists who used different measurement systems in their research. The problems that might arise if they shared their data is obviously and primarily error. Errors are recognized and one element in every measure, system and quantity. Error was already even present in the measurement system alone a scientist used and it will furthermore aggregate, when these two different scales are combined the more error escalates in the process. There are two types: random and systematic error.

Answer:If they were working together on the same project and their units were not converted to match, the project would go wrong.Explanation: This happened with some of NASA's Mars probes. That is why there are International Standards (ISO) units of measure agreed worldwide and it is foolish, in the modern world for professionals not to use them.

What is the series equivalent of two 1000 W resistors in series?

The equivalent resistance when two resistors are connected in series is the sum of their individual resistances.The marking on the resistor that says "1000 W" is the rating that tells how much power the resistor can safely dissipate, without overheating or exploding. (The 'W' stands for 'Watts'.) It doesn't tell us anything about their individual resistances. So we don't have enough information to calculate their series equivalent.

kilo- - 1,000deka- - 10How much larger is a kilo- than a deka-?

[tex]lets's \ take \ an \ example \ one \ gram: \\ \\ 0,001kg \\ \\ 0,01hg \\ \\ 0,1dag \\ \\ \boxed{1g} \\ \\ 10dg \\ \\ 100cg \\ \\ 1000mg \\ \\ the \ units \ are \ rising \ and \ decreasing \ from \ 10 \ to \ 10 \ results \ \\ \\ a \ kilogram \ is \ 100 \ times \ larger \ than \ a \ dekagram[/tex]

What's bigger 32A or 32B

If A is bigger than B, then 32A is.If B is bigger than A, then 32B is.

Do you think the buoyant force would be greater or smaller if the gold cube were suspended in water? Explain your answer.

'Greater' or 'smaller' means whatever the force is right now would change.In order to figure out how it would change, we would need to know what the cube is surrounded by right now, before it goes into the water.What I'm really trying to say is: There's not enough information in the question for us to be able to answer it.

You did not give enough information. The answer depends on the conditions before the cube is hung in water. Is it currently in air or some other fluid? Or was it resting on the bottom of a container with water in it?

Why do resistors have tolerance?

Machines capable of manufacturing exactly the same component time after time, with exactly the resistance you want, would be very expensive, and so would the products they turn out. A resistor would cost a dollar instead of a few pennies.The machine itself, and its output, work within tolerances.The cheapest mass-produced resistors are guaranteed to be within 20% above or below the resistance marked on them. And you know what ? For most bench-work and prototyping, that's usually close enough.

A machine is designed to lift an object with a weight of 12 newtons. If the input force for the machine is set at 4 newtons, what is the mechanical advantage of the machine?

If the input force for the machine is set at 4 newtons, then the machine may or may not be able to lift the object. If it IS able to lift an object that weighs 12 newtons, then the mechanical advantage of the machine must be at least 3 or more.

Mechanical advantage is calculated by output force/input force (Fo/Fi).So, 12/4=3.

SecurityReports

For this assessment, you will be taking Newton’s laws and describing how they are illustrated in a specific event. You only need to choose one of the options provided. Once you select the option, you will describe in detail how this option illustrates each of Newton’s three laws of motion.option one:Amusement parks are a great place to see Newton's laws of motion in action. Choose your favorite ride and describe the parts of the ride that illustrate each of Newton's laws of motion. You are only required to give a written description; however, if you would like, you may draw and label a picture in addition to the paragraph explanation. Please be sure to look at the rubric to see exactly what you are expected to include! option two:Understanding the laws of motion can enhance performance in sport activities. Choose your favorite sport and describe where players use Newton’s three laws of motion to be successful. You are only required to give a written description; however, if you would like, you may draw and label a picture in addition to the paragraph explanation. Please be sure to look at the rubric to see exactly what you are expected to include!option three:In the United States, car accidents are the leading cause of death for teenagers. Wearing seat belts helps save lives. Describe how Newton’s three laws of motion are used in testing the safety of our automobiles. You are only required to give a written description; however, if you would like, you may draw and label a picture in addition to the paragraph explanation. Please be sure to look at the rubric to see exactly what you are expected to include!

Subject: Physics - Page 309