# You've dropped a lucky penny into the middle of a hemispherical water basin of radius 3m. There is a light on the upper edge of the basin. The penny falls vertically along the axis of symmetry of the basin, and

73,406 results

### Calculus

You've dropped a lucky penny into the middle of a hemispherical water basin of radius 3m. There is a light on the upper edge of the basin. The penny falls vertically along the axis of symmetry of the basin, and when it is 1m from the bottom of the basin it is falling at 2m/s. ...

### calc

You've dropped a lucky penny into the middle of a hemispherical water basin of radius 3m. There is a light on the upper edge of the basin. The penny falls vertically along the axis of symmetry of the basin, and when it is 1m from the bottom of the basin it is falling at 2m/s. ...

### Science

Water is pumped from a stone basin up through a pipe 1 meter high. At that height, the water flows out through a tap and falls down through the air to the basin below, where the cycle begins again. What is the gravitational potential energy of 2.5 kilograms of water at the top...

### Physic

In a dramatic lecture demonstration, a physics professor blows hard across the top of a copper penny that is at rest on a level desk. By doing this at the right speed, he can get the penny to accelerate vertically, into the airstream, and then deflect it into a tray. Assuming ...

### Physics- Accleration of a Falling Penny

A visitor to the observation deck of a skyscraper manages to drop a penny over the edge. As the penny falls faster, the force due to air resistance increases. How does this affect the acceleration of the penny? a. The acceleration decreases b. The acceleration remains constant...

### physics

A penny is dropped from a 300ft high bridge. a. How long does it take for the penny to reach the ground below? b. What is the velocity of the penny upon impact?

### physics

A penny is dropped from the top of a building 310 m high. Ignoring air resistance, if the penny falls straight down, with what speed would it hit the ground?

### physics

A penny falls from a windowsill 25.0 m above the sidewalk. How fast is the penny moving when it strikes the ground? (Remember that the velocity will be negative due to the downward motion of the penny)

### Physics

A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water?

### Physics

A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water?

### Hydrology

I have no idea how to calculate this, I just need some direction please (like an equation)? Consider a drainage basin 187 km2. How much water is produced (m3) if 2.5 inches of rain falls on the basin? How many people could be supported on the water produced per day? Per year? ...

### algebra

A man tosses a penny up into the air above a 100 ft well with a velocity of 5 ft/sec. The penny leaves his hand at a height of 4 ft. How long will it take for the penny to reach the bottom of the well?

### Math

A penny is dropped onto a rectangular surface. If it is equally likely for the penny to land anywhere inside the large rectangle, what is the probability that all or part of the penny will come to rest inside the shaded area? Round your answer to the nearest whole percent. A. ...

### 8th Grade History

In which region do rivers flow into a basin but evaporate before they make it to a larger body of water? A.the Coastal Plains B.the Great Plains C.the Great Basin D. the Everglades Thank ya!!! <3

### Algebra 1

A penny is dropped from the top of a 345 foot building. Time is being measured in seconds. A.) Write an equation that models the scenario B.) How far is the penny from the ground after 2 seconds? C.) How long does it take the penny to reach the ground?

### Science

According to the fossil record shown, how did the Bighorn Basin environment change from 55.85 to 55.75 million years ago? Highlight the correct answer choice. (1 point) A. Over time, less plant life covered the basin. B. Over time, more plant life covered the basin. C. Over ...

### Physics

A penny is placed on a disk that is rotating at 2 revolutions per second. The coefficient of friction between the penny and the disk is 0.4. What is the maximum radius at which the penny will stay on the disk? a. 2.5cm b. 100cm c. 1cm d. 10cm e. 25cm

### reading comprehension

Bob has a brother, Jim, who has a daughter named Bertha. Bertha's daughter, Jennifer, has a sister named Penny. Which of the following indicated the relationship between Jim and Penny? a. Jim is Penny's father b. Jim is Penny's uncle c. Jim is Penny's grandfather. d. Jim is ...

### phy

Boy throws a penny into a wishing well at a velocity of 2 m/s and at an angle of 45 degrees below horizontal. If the penny takes 1.3 seconds to hit the water, how deep is the well?

### math

Sara brought a total of 8 nails at ace hardware . she purchased both 6 penny nails and 10 penny nails . she brought 2 more 6 penny nails then she did 10 penny nails . she had a total of 8 mails. How many 6 penny and 10 penny nails did sara purchase

### Physics

A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.50 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with ...

### Physics

A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.50 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with ...

### physics

A penny is placed at the outer edge of a disk (radius = 0.119 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.70 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with ...

### science

if you place a dime penny and quarter on a spinning turntable which coin has a greater speed than the penny than the penny

### physics

a penny is placed at the outer edge of a disk(radius =0.150m) that rotates about its axis perpendicular to the plane of the disk at its center. the period of rotation is 1.80s. find the minimum coefficient friction necessary to allow the penny to rotate along with the disk

### algebra

Sara bought some 6-penny nails and some 10-penny nails at ace hardware. She bought 2 more 6-penny nails than she did 10-penny nails. She had a total of 8 nails. How many 6-penny and 10 penny nails did sara purchase?

### Geography

1.1.1define the term drainage basin 1.1.2what is the difference between drainage basin and catchment area? 1.1.3 name any two water management areas in south africa. 1:2 THE IMPONTANCE OF MANAGING DRAINAGR BASIN CATCHMENT AREAS IN SOUTH AFRICA SHOULD BE A CORCERN FOR ALL SOUTH...

### Science

While Carmen is at the park with her family, she walks up to a wishing well. She throws a penny down the well, and she hears a splash at the bottom. Which of the following best describes what happens as the penny falls? A)The force of gravity is equal to the air resistance ...

### Science

While Carmen is at the park with her family, she walks up to a wishing well. She throws a penny down the well, and she hears a splash at the bottom. Which of the following best describes what happens as the penny falls? A)The force of gravity is equal to the air resistance ...

### Physics

A penny rests on top of a bowling ball. You give the bowling ball a slight bump and the penny slides off the frictionless, spherical surface as shown below. At what angle θ does the penny leave the surface of the bowling ball? (Hint: When the penny leaves the surface, the...

### science

The turntable below is spinning. Which coin has a greater speed than the penny? a. the dime b. the quarter c. The penny is moving faster than both of the other coins. c. All three objects are moving at the same speed. pennyis closest to center dime in middle quarter on outer edge

### Calculus

if a penny is dropped from the top of a 320 ft. building, how fast will it be moving when it hits the ground? So we can find the speed of the penny as instantaneous rate of change of height of penny when it hits ground. Instantaneous rate of change of y with respect to x is dy...

### physics

a penny dropped from the Empire state building. how far does the penny drop in 6 seconds? how fast will it be moving after 10 seconds?

### physics

A penny is dropped from rest from the top of the Trump Tower in New York City. Considering that the height of the building is 283 m and ignoring air resistance, find the speed with which the penny strikes the ground.

### Algebra2

Pepe throws a penny off the empire state building. The penny's height above ground can be modelled using the equation h=-16.1t^2+5t+1250 where t is time in seconds. How high is Pepe when he throws the penny? How many seconds does it take the penny to hit the ground?

### physics

A man stands at the top of a 27-m high building and throws a penny straight downward. If the penny has an initial velocity of -3.9 m/s, what is the velocity of the penny in m/s when it hits the ground?

### math

John tosses a penny 10 times and finds that 2 of those times the penny comes up heads and 8 of those times the penny comes up tail. What should John conclude? a.That the expected relative frequency probability of getting heads when tossing a penny is 2/10. b. That it is more ...

### Physics

A penny is dropped from rest from the top of a very tall building. Assuming the height of the building is 406 m and ignoring air resistance, find the speed with which the penny strikes the ground.

### Geography

i need to label a diagram of the drainage basin of the River Tees. the words i have got to use are:- Tributary Mouth Confluence Source Reservoir Also i need to colour the diagram to show the relief of the drainage basin. A)Shade the river and its tributaries in blue B)Shade ...

### physics

a penny is placed .1 m from the center of a turntable. if the coefficient of static friction between the penny and the turntable is .5, the maximum linear speed at which the penny can travel without slipping is approximately a) .49m/s b) .7 m/s c) 1.3 m/s d) 1.4 m/s e) .2 km/s...

### physics

A man leaves his front door, walks 440 m east and 380 m north, stopping at the edge of a cliff. He then takes a penny from his pocket and drops it from the cliff, which is 20 m high. What is the magnitude of the displacement (in meters) of the penny?

### mechanics

Drops of water leak from a tap 2m above the basin at regular intervals.As the first drop strikes the basin the fourth drop starts its fall.what is the spacing between the drops 1and 2,drop 2and3,drop 3and4 at this instant.

### Physics(Please respond)

1) A penny is dropped from rest from the top of a very tall building. Assuming the height of the building is 407 m and ignoring air resistance, find the speed with which the penny strikes the ground. I am not sure how to start this. Thank you!

### AP Physics B

A penny of mass 3.1g rests on a small 28.2g block supported by a spinning disk of radius 12cm. The coefficients of friction between the block and disk are .73 (static) and .64 (kinetic) while those for the penny and black are .6 (static) and .45 (kinetic). What is the maximum ...

### physics

boy throws a penny into an empty well with an initial velocity of –2 m/s. He hears it hit the bottom 8 seconds later. About how far did the penny fall?

### math

Give each letter of the alphabet a money value: A= 1 penny, B= 2 penny, C= 3 penny,and so on.Find words worth 1/5 dollar, 9/10 dollar, 1 1/20 dollars, and 1 1/2 dollars.

### math

Give each letter of the alphabet a money value: A= 1 penny, B= 2 penny, C= 3 penny,and so on.Find words worth 1/5 dollar, 9/10 dollar, 1 1/20 dollars, and 1 1/2 dollars.

### physics

bill and bob are both on the roof of a building 176.4 m high. bill drops a penny straight down at the same instant, bob throws a dime vertically upwards. the dime is thrown over the age when it comes back down it misses the roof and follows the penny to the street below. how ...

### physics

bill and bob are both on the roof of a building 176.4 m high. bill drops a penny straight down at the same instant, bob throws a dime vertically upwards. the dime is thrown over the age when it comes back down it misses the roof and follows the penny to the street below. how ...

### Algebra---Variation

It is a variation problem. I know what the answer is and how to get to the answer I just don't know how I got it. From measurements on many rivers, geographers find that the length of a river that drains a particular "basin" of land is approximately proportional to the 0.6 ...

### Chemisry

If you put copper coated penny 1983or newer, in vinegar, it turns blackish green. If you rub the copper off half the penny first and expose the zinc, put the penny in vinegar, will the results change? Thank you.

### Math

Take the greatest care with your significant digits. If you don't this qusestion is not do able. Llyn Gweision ( A welsh lake) has a surface area of 10km2. It is fed by two rivers: the afron Chwefru and the nant aeron. The Chwefru has a catchment area of 1250km2. The aeron has...

### science

A ping pong ball and a penny are placed in water. The ping pong ball floats while the penny sinks? What property of water does this demonstrate? I think it has to do with the density. The reason the ping pong ball floats is because it has a lower density than the water. The ...

### bUSINESS

I NEED HELP TO FIND PENNY STOCKS AT NASDAQ. Penny stocks usually sell for less than $1.00 a share -- although some investors consider any stock selling for less than $5.00 a share a penny stock. Please check with your instructor to see how s/he wants you to define a penny ...

### Please Help Me

There were approximately 28 million adults on Canada when a survey was conducted. In an online survey, 1008 Canadians took part. 68% said that the penny should be abolished. If the margin of error was +- 3.1%, give an upper and lower estimate for the number of Canadian adults ...

### Math2(Please Help)

There were approximately 28 million adults on Canada when a survey was conducted. In an online survey, 1008 Canadians took part. 68% said that the penny should be abolished. If the margin of error was +- 3.1%, give an upper and lower estimate for the number of Canadian adults ...

### chemistry

The mass of one penny is 2.51 grams and its volume is 0.40 cubic centimeter. The density in g/ml of this penny is

### Probability

* I have a question. The sentence below says, "A PENNY, a NICKEL, and a DIME are flipped....." Does this go in order? That is,.....for example: (H,T,H)The first H is for PENNY, the T is for NICKEL, and the last H is for DIME? A penny, a nickel, and a dime are flipped at the ...

### chemistry

15. On October 21, 1982, the Bureau if the Mint changed the composition of pennies. Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2 Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6% Zn and 2.4% Cu by mass...

### math (for Penny)

hey penny i need to know how to graph it

### Grammar ( Need help Ms. Sue )

Directions: Read each passage and ask yourself, ''What is the author doing in this paragraph?'' Write each anser in the summary box and then think of an appropriate title for the passage based on the main idea of the passage. 1 A penny for your thoughts? If it's a 1943 copper ...

### Math

Suppose there are 500 pennies in a row... (math problem)? The pennies are all "heads up" Now suppose that 500 people line up and ... Person #1 turns over all the pennies Person #2 turns over every 2nd penny, starting with penny number 2 Person #3 turns over every 3rd penny, ...

### Lisa

A man leaves his front door, walks 330 m east and 320 m north, stopping at the edge of a cliff. He then takes a penny from his pocket and drops it from the cliff, which is 10 m high. What is the magnitude of the displacement (in meters) of the penny? I'm confused on how a ...

### Environmental science

Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru(Ich) has a catchment area of 1250 km2. The Aeron(Iae) has a catchment area of 2.400 * 106 ha. The outflow stream, the Afon Rhondda (Orh) has ...

### MATH/SCIENCE

Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru(Ich) has a catchment area of 1250 km2. The Aeron(Iae) has a catchment area of 2.400 * 106 ha. The outflow stream, the Afon Rhondda (Orh) has ...

### HELP!!! Math

You visit the Grand Canyon and drop a penny off the edge of a cliff. The distance the penny will fall is 16 feet the first second, 48 feet the next second, 80 feet the third second, and so on in an arithmetic sequence. What is the total distance the object fall in 6 seconds?

### Chemistry

This is a longer assignment. I want you to confirm my first two answers and help me figure out the last. 3 Cu (s) + 8 HNO3 (aq) → 3 Cu(NO3)2 (aq) + 2 NO (g) + 4 H2O (l) A copper penny with a mass of 3.067 g is dissolved in 100.0 ml of 1.000 M nitric acid. A. How many ...

### ENVIRONMENTAL SCIENCE ( math/science)

Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru(Ich) has a catchment area of 1250 km2. The Aeron(Iae) has a catchment area of 2.400 * 106 ha. The outflow stream, the Afon Rhondda (Orh) has ...

### science physics

A penny is dropped from a window and takes 1.82s to reach the ground. From what height was it dropped.

### Environmental Science

Take the greatest care with your significant digits. If you don¡¦t, this question is not ¡§do-able¡¨. Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru has a catchment area of 1250 km2. ...

### social studies

Name the 5 regions that the U.S. is divided into. There are many ways to do this dividing. One would be: far west (including rocky mt. states) midwest (including Texas) south midatlantic New England Another, more based upon topography, would be: Pacific coastal region Atlantic...

### physics

A coin of mass 3 g slides horizontally on the surface of a table. The frictional force exerted on the penny is 0.0147 N. What is the coefficient of friction between the table and the penny?

### physics

A coin of mass 3 g slides horizontally on the surface of a table. The frictional force exerted on the penny is 0.0147 N. What is the coefficient of friction between the table and the penny?

### Math

Water is poured into a hemispherical bowl with a radius of 30cm. The water's depth is 12cm. Calculate the radius of the surface of the water

### Criminal Justice/Judicial System

History makes it clear that the federal bench has attracted people from a fairly select demographic, usually the __________ and __________ classes. A. lower upper; upper upper B. upper middle; upper C. middle; upper middle D. lower; middle I think it's D, but not sure.

### MATHS

Long ago when apples were cheap, two ladies went to market and each sold 30 apples on different stalls; Mrs Rosy sold hers at 2 for a penny, Mrs Juicy at 3 for a penny. The next week they decided to share a stall and sell 60 apples between them at 5 for 2 pennies. At the end ...

### Honors Chemistry

We did the gold penny lab, where we bathed a copper penny in a hot zinc-NaOH mixture to turn it a silver color, then we heated that in a flame to turn it a gold color. There are two questions that go with this lab that I don't understand, however: 4. Did the copper and zinc ...

### CHEMISTRY

what do you observe if you drop water to a basin of water? Explain please

### science

What happen to the water in the basin when you placed a drop of water?

### Physics

A pure copper penny is slid along a steel counter top. If the coefficient of kinetic friction between the copper and the steel is 0.36, what is the magnitude of the penny's acceleration?

### Chemistry

A modern penny weighs 2.5 g but contains only .063 g of copper. How many copper atoms are present in a modern penny? Thanks in advance for any help you can give!

### physics

A penny falls from a bridge. At 3.2 seconds it will have fallen ___

### physics

For an interesting physics field trip, we visit Tahquamenon Falls in the Upper Peninsula. We measure the horizontal speed of the water at the top of the falls to be 3.98 m/s. How far vertically below the top edge of the falls does the velocity vector of the water point ...

### chemistry

a pure copper penny contains appoximatel 3.0 x 10 to the 22 copper atoms. use the definitions in the previous problem to determine how many______of copper atoms are in a penny.

### Programming

Design a program in pseudocode that calculates the amount of money a person would earn over a period of time if their salary is one penny the first day, and then doubles each day. The program should ask the user for the number of days. Display what the salary was for each day...

### Chemistry

Before 1982 U.S pennies were made of solid copper. As the price of copper rose,the U.S mint switched to a composition that is 97.5% zinc and 2.5% copper. A penny minted after 1982 is 19 mm in diameter and 1.6 mm thick. What is the volume of a penny in mL?

### chemistry

Before 1982 the US Mint cast penny coins from a copper and zinc mixture. If a 1980 penny weighs 3.051g and contains 0.153g zinc, what is the percent of copper in the coins?

### chemistry

Before 1982 the US Mint cast penny coins from a copper and zinc mixture. If a 1980 penny weighs 3.051g and contains 0.153g zinc, what is the percent of copper in the coins?

### Physical science

A copper penny has a mass of of 3gram. The atomic number of copper is 29 and the atomic mass is 63,5gram/mol.what is the total charge of all electrons in the penny?

### math

Take the greatest care with your significant digits. If you don’t, this question is not “do-able”. Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru has a catchment area of 1250 km2. The...

### Maths

A hemispherical paper is folder into a hallow right circular cone. The radius of the hemispherical paper is 12cm. What's the cone's base radius, height and volume?

### math

A cylindrical glass of radius 7 cm is partially filled with water . 154 metal cubes of edge length 1 cm have been dropped into this glass slowly.after that water rises up to the brim of the glass .the rise in water level will be

### Programming

Design a program in pseudocode that calculates the amount of money a person would earn over a period of time if their salary is one penny the first day, and then doubles each day. The program should ask the user for the number of days. Display what the salary was for each day...

### physics

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...

### physics

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...

### 4th garde math

Jenny has twice as many cookies as Penny. Winnie has four more cookies than Jenny. If they have 44 cookies altogether, how many cookie does Penny have? Write a number sentence

### algebra

A penny has a 1 cm radius. What is its diameter? Its circumference? its area?

### AP PHYSICS

the height of the upper falls at Yellowstone falls is 33.2m. when the water reaches the botton of the falls, its speed is 25.8 m/s. neglecting air resistance, what is the speed of the water at the to of te falls.

### Physic

Assuming no air resistance, how long does it take a penny to fall if it was dropped from the CN Tower (553 m)? Acceleration due to gravity is 9.8 m/s2.