A cubic box of volume 3.7 10-2 m3 is filled with air at atmospheric pressure at 20°C. The box is closed and heated to 185°C. What is the net force on each side of the box?

60,751 results, page 207

Physics

A man pulls a rope attached to a crate with a force of 120 N. If the rope makes an angle of 130 degrees with the ground, find the components of the force.

Phys

Centripetal force: a race car driver wants to stay as straight as possible around the curves in the race. What should happen to his radius, force and velocity?

Science Physics

Madison pushes with a 160-N horizontal force on a 20-kg crate of coffee resting on a warehouse floor. The force of friction on the crate is 80 N. Show that the acceleration is 4 m/s2.

physics

A single constant force 18.1 N acts on a particle of mass 2.92 kg. The particle starts at rest at t=0. What is the instantaneous power delivered by the force at t=4.48s? Answer in units of W

physics

A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force.If the stone leaves with a velocity of 4om/s,what is the value of force?

Physics

A mass of 25kg is acted on by a force of 56N. If a friction force of 12N exists, find the acceleration of the mass. I have worked the following: a=F/M = 44/25 = 1.76 m/s2 Am I correct? Thank you.

Physics 30

Two point charges objects produce an electric force on each other of 3.6x10^-2 N. What is the electric force between them if the distance is increased five times?

PHYSICS. HELP!my work

two force of 20N and 34N act on a body in such a way that they make an angle of 35 with each other. find the resultant of the two force

Physics

1. How much (Power/Force) is required to lift 8Kg 12meters up within 15sec? 2. Can you tell me difference Power Force from that question or anyway simple?

calc

a wrench is rotated with torque of magnitude 175 N (M). the force is applied 45 cm from the pivot point at an angle of 48 degrees. what is the magnitude of the force, to one decimal place?

Physics

The sum of two point charges is +11μC. When they are 2.7cm apart, each experiences a force of 224 N. Find the charges given that the force is: a) repulsive b)attraction

math: pre-calculus

If current rates of deforestation and fossil fuel consumption continue, then the amount of atmospheric carbon dioxide in parts per million (ppm) will be given by f(x)=375e^0.00609c, where c=0 corresponds to 2000. a)What is the amount of carbon dioxide in 2022? b)In what year ...

Physics

Do circular electric lines of force exist ? why? what about magnetic lines of force? Pl help

Physics

If a force of 20N stretches a spring 15 cm, by what amount will the spring stretch is if a force of 80 N is applied?

PHYSICS

A force of 25.0 N acts at an angle of 25° to the horizontal. Find the horizontal and vertical components of the force.

physics

what is the magnitude of the resultant of a 6.0n force acting vertically upward and a 4.0n force acting horizontally

Physics

It takes 56 J to push a block 4 m. If the force is in the same direction as the displacement, what is the force on the block?

physics

How to calculate the maximum vertical component of the force in rope BC when the force in rope is 400N

physics

is electric force between two charges greater than the gravitational force between them ?

Physics

A spring of natural length 1.5m is extended 0.0050m by a force of 0.8N, what will its length be when the applied force is 3.2N?

Help in Chemistry!!

You are given an aqueous solution of hydrofluoric acid. (Recall that hydrofluoric acid is a weak acid; When you are given an aqueous solution of a weak acid you always assume that the dissociation reaction of the acid in water has reached equilibrium) Predict whether the ...

MATH

When a concrete structure is built, and engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The ...

MATH

When a concrete structure is built, and engineer often performs a slump test on the concrete to ensure that it is of suitable strength and consistency. The engineer fills a truncated cone with bottom diameter 200mm, top diameter 100mm and height 300mm with concrete. The ...

Chemistry

A solution made up of 1.00 M NH3 and 0.500 M (NH4)2SO4 has a pH of 9.26. a. Write the net ionic equation that represents the reaction of this solution with a strong acid. b. Write the net ionic equation that represents the reaction of this solution with a strong base. c. To ...

Physics

The 2nd harmonic of a string of length 60cm and linear mass density 1.7g/m has the same frequency as the 5th possible harmonic of a closed pipe of length 1.2m. Find the tension in the string.

Physics

A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of seawater is 1025 kg/m^3...

Physics

I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. At what fraction of the maximum height reached...

Physics

I fire a tennis ball from an air cannon, straight up from ground level, at initial speed v0. At the instant it reaches the top of its trajectory, I fire a second tennis ball at the same initial speed. Air resistance is negligible. At what fraction of the maximum height reached...

chem

when hydrocarbons are burned in a limited amount of air CO as well as CO2 form. When 0.450 grams of a particular hydrocarbon was burned in air, 0.467 grams of CO, 0.733 grams of CO2, and 0.450 grams of H20 were formed. a. What is the empirical formula? I got C2H3! check? b. ...

Physics

A flute can be regarded as a tube open at both ends. It will emit a musical note if the flutist excites a standing wave in the air column inside the tube. The lowest musical note that can be played on a flute is C (261.7 Hz). What must be the length of the tube? Assume that ...

chemistry

Using your answer from Part A, calculate the volume of a mole of Na atoms (in cm3/mol ). Assume that the entire volume is occupied by Na atoms leaving no gaps or holes between adjacent atoms. (Answer A is V= 2.70*10^7)

Chemistry

prepare some 0.1 HCl by diluting the appropriate volume of stock 'conc' HCl to 1L. The stock acid is 37.4% HCl by weight and has a density of 1.19g/mL . Measure out the required volume with a graduated clyinder

Chemistry

Does the molarity change with the volume? For example we did an experiment in lab with one trial containing 0.1 M KI at 100 mL and another with 50mL. So does the molarity (M) change with volume change?

chemistry

What volume of water would be required to dilute a 10.0 mL 0.650 M solution of calcium sulfate to create 0.25 M solution, what would the volume of the new solution be?

physics

in a reference frame s, the volume of a cube is 1000cc.find the volume of the cube in a reference s'.which is moving paralell to the edge of the cube with a velocity 80%of that of light

chemistry

Volume of distilled water used 12.09 mL Volume of HCl added 0.87 mL Concentration of added HCl 1.979 M pH of diluted HCl solution ___________________

Chemistry

How would you prepare 165 mL of a 0.976 M NaOH solution, starting with a 6.36 M stock solution? Volume of solution needed? Volume of water needed?

Word Problem

A swimming pool 25 m long, 15 m wide, and 150 cm deep is being filled at the rate of 20 L/min. How many hours will be needed to fill the pool?

maths

A tank was filled with 20L of water. However, there was a hole and 2/3L was leaked out every minute.How long did it take for the tank to become empty?

physics

Some incandescent light bulbs are filled with argon gas. What is vrms for argon atoms near the filament, assuming their temperature is 2100 K?

Chemistry

Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2) calculate the mass percent of acetic acid in the...

Calculus - Hydrostatic Pressure

Please check my work: Find the hydrostatic pressure on one end of a water trough full of water, the end of which is a trapezoid with given dimensions: top of trapezoid = 20 feet, sides of trapezoid both = 8 feet, bottom of trapezoid = 12 feet. Depth of water = 8 feet Density ...

Math, Please check answers

I do not want to fail this, could you please help me with number 1 and 3.D, and then check my other answers? Thank you. 1. Find and simplify the volume-to-surface-area ratio for each of the three possible ice cube shapes. You can use this chart. |Shape| S/A Formula|Volume ...

Physics

A circuit is composed of a capacitor C= 3 micro F, two resistors both with resistance 69 Ohm, an inductor 6.00e-2 H, a switch , and a battery 25 V. The internal resistance of the battery can be ignored . Reminder: The " L=x.xxenn H" notation means " L=x.xx X 10^nn H". ...

Physics bobpursley

hello ok i realized what you meant. =) An object of mass M = 921 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50o with the horizontal. The normal force acts perpendicular to the slope. The slope is the x-component and y ...

chemistry 11

Food manufacturers sometimes add calcium acetate to puddings and sweet sauces as a thickening agent. What volume of 0.500 mol/L calcium acetate, Ca(CH3COO)2 (aq), contains 0.300 mol of acetate ions? So I've been over this a hundred times and I still can't get past the part ...

physics 152

The force exerted by the wind on the sails of a sailboat is 500 N north. The water exerts a force of 150 N east. If the boat (including its crew) has a mass of 290 kg, what are the magnitude and direction of its acceleration?

Physics

How many newtons of force are necessary to accelerate a 0.0050 kg mass at the acceleration (a) of 9.81 m/s2 with the force expressed in the correct number of significant figures? (F = ma) 0.04905 N 0.049 N 0.05 N 4.91 × 102 N Please help me :( It's just one little question.

Physics

I don't know how to solve this problem. In it, I am given the mass (4 kg), acceleration (0), velocity (20 m/s), coefficient of friction (.2), and the applied force (10 N downwards with an angle of 30 degrees above the horizontal). I must find the displacement of the object if ...

Data Analysis

A manufacturing company wishes to estimate the number of items that its workforce can produce on average each hour now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past month. The hourly production rates for these 8 ...

chemistry

what is the solubility of N2 at a pressure of 10 atm? partial pressure at 1 atm=0.78 atm solubility at 1 atm= 5.3 x 10^-3 mol/L

science

will the air above a surface that has a high albedo be warmer or cooler than the air above a surface that has a low albedo? Low.

Calculus volume stuff

Find the volume of the solid obtained by rotating the region bounded y = 16 x and y = 2 x^2 about y =0 Find the volume of the solid obtained by rotating the region bounded about the x-axis by y=4x^2, x =1, and y = 0 Find the volume of the solid generated by rotating the region...

chemistry NEED HELP please

N2(g) + 3H2(g) ==> 2NH3(g) A. If 16.99 g of hydrogen is reacted at STP, volume of ammonia is produced? B. If 35.82 L of nitrogen is reacted at STP, what mass of hydrogen must also be reacted? C. At STP, what volume of hydrogen is needed to produce 70.9 L of ammonia; D. What...

Physics

A rogue chipmunk has been raiding the secrete acorn stash of 3 squirrels. On discovering the perpetrator in the very act they secure him with 3 ropes and attempt to pull him off the limb where he falls to his demise. The first squirrel pulls at an angle of 12 degrees with a ...

physics

When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each other.B...

physics

A solid sphere of uniform density starts from rest and rolls without slipping down an inclined plane with angle θ = 30o. The sphere has mass M = 8 kg and radius R = 0.19 m . The coefficient of static friction between the sphere and the plane is μ = 0.64. What is the ...

science?

Why would a potato cook faster if you poke holes in it with a fork before microwaving it? ~My thinking is that it would increase the surface area..but this could be just partially why it cooks faster. Thank You =D I don't know in a microwave it cooks faster. If you poke holes ...

principles of physics

When we studied the concept of work, we learned that work = force x distance. Now we learn that torque = force x distance. What's different about these two definitions?A) For work, distance and force are in the same direction; for torque they are perpendicular to each other.B...

Chemistry

NH3 + Pb(NO3)2 -> How can I find the product and the net ionic equation? I suspect this is in a water solution, so the lead nitrate is in solution, but NH3 will react with the water to form ammonium ions, and hydroxide ions. The lead ions will react with the hydroxide ions ...

Physical Science

Inferring:A student examines a thermometer placed in a can containing a substance that is being heated. The temperature remains the same for several minutes, then it starts to rise.Without looking in the can, how does the student know what is occurring in the car?

chemistry

The equilibrium constant of the reaction CH3COOH (l)+C2H5OH (l)=CH3COOC2H5+H2O is 4.if one mole of each of acetic acid and ethyl alcohol are heated in presence of little concentrated H2SO4 at equilibrium the amount of ester present is?

chemistry

The equilibrium constant of the reaction CH3COOH (l)+C2H5OH (l)=CH3COOC2H5+H2O is 4.if one mole of each of acetic acid and ethyl alcohol are heated in presence of little concentrated H2SO4 at equilibrium the amount of ester present is?

Science

1kg of water contained in a metal container is heated with 1me immersion heaterif the temperature roses from 25c to 45c in 100s what is the average rate of heat loss to the surroundings from the container during this time?

chemistry

A 100.0 mL sample of hard water is titrated with the EDTA solution from Part 2. The same amount of Mg2+ is added as previously, and the volume of EDTA required is 22.44 mL What volume of EDTA is used in titrating the Ca2+ in the hard water? How many moles of EDTA are there in ...

Proportional Reasoning( Please Help Assignment Due

Chef Potato's body has a cylinder in the middle and two half spheres that make up his bottom and head. He has the two dimensional shape measurements as follows: 20 cm in total length, 5 cm between the end of the cylinder and the top of the top sphere. Reduce Chef 1.) Potato by...

Physics (urgent please)

Two parallel wires are carrying 5A and are separated by 2.0 m. if the currents are in opposite directions, what is the magnitude of the magnetic field halfway between them? Someone please help as I can't figure out the question. Thanks, They are asking for the field between ...

Science!

Which would spoil more quickly ground beef or steak? You have to define "spoil". If you mean bacteria that grows in the presence of air, then ground beef. It has been stirred up, bacterial mixed throughout, and exposed to air. yea that's what i mean 'bacteria that grows on it.

Physics

Light is incident on a glass-air interface from the glass side (n=1.5), and researchers want to use the evanescent field on the air side (n=1.0) to excite the molecules adhered to the surface. It is desired that the evanescent field extend a distance δ = 2 µm into the ...

English / Grammar

I need help with the following grammar exercise. Rewrite the following sentences, focusing on the grammar area specified above the sentence. If the sentence is already correct, write No Change. Punctuating Sentences The goose bit the mailman on the leg. Punctuating Sentences ...

AP chemistry

A typical electric air conditioner rated at 1.00 * 10^4 Btu/h (1 Btu = amount of energy required to raise the temperature of 1 lb of water by 1F). How much water must be evaporated each hour to dissipate as much heat as a typical electric air conditioner?

Physics

a 1kg ball is thrown into the air with an initial velocity of 30 m/sec. how much kinetic energy does the ball have? -how much potential energy does the ball have when it reaches the top of its ascent? -how high into the air did the ball travel?

Physics

I launch a ball vertically precisely 8' in the air. Then I launch a ball vertically 10' in the air. How much longer will it take the ball to travel 10' versus 8'? Put differently, how much more time does it take the ball to go the 2' further (travelling up and returning down)?

algebra

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t² Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

algebra

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t² Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

math HELP

When a ball is thrown in the air, the height h of a ball in feet t seconds after the ball is thrown in the air, is given by the equation height = 25t–16t² Use the quadratic equation to determine how many seconds goes by before the ball hits the ground?

Chemistry

How many milliliters of glacial acetic acid are needed to prepare 2.0 L of 10.0% volume/volume acetic acid?

physics

an objectfloats in water with 3/4 its volume below the surface of the water. if the volume of the object is 1 m^3, what is the mass of the object?

Chemistry

A steel container of oxygen has a volume of 20.0 L at 22 C @35 atm. What is the volume @ STP? How many mol of oxygen are in the container?

chem

A steel container of oxygen has a volume of 20.0 L at 22 C @35 atm. What is the volume @ STP? How many mol of oxygen are in the container?

Chemistry!!

A steel container of oxygen has a volume of 20.0 L at 22 C @35 atm. What is the volume @ STP? How many mol of oxygen are in the container?

Chemistry

A steel container of oxygen has a volume of 20.0 L at 22 C @35 atm. What is the volume @ STP? How many mol of oxygen are in the container?

geometry

216 in cubed is the volume of a figure 27 in cubed is the volume of a similiar figure what is the scale factor?

Science

What are the surface area, volume, surface area:volume, and distance of diffusion for the following dimensions: 1 cm x 1 cm x 1 cm 2 cm x 2 cm x 2 cm 1 cm x 1 cm x 6 cm

Chemisty

The volume of a single niobium atom is 9.46E-24 cm3. What is the volume of a niobium atom in microliters?

Chem - Im lost

A sample of an ideal gas has a volume of 3.35 L at 14.00 °C and 1.40 atm. What is the volume of the gas at 21.60 °C and 0.993 atm?

Chemistry

What can be concluded about Volume in milliliters per celsius, and volume in milliliters per kelvin?

physical science

What is the density of a suitcase that has a mass of 25 g and a volume of 13 cm3? Formula: Density = Mass/Volume

volume for pyramids and cones

when finding the volume for cones and pyramids, why do you have to multiply it with 1/3 or divide the product by 3?

Math

the cube side lengths are 90 cm, to find volume Do l x w x h create an expression to find the volume of the cube!

Physics

Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now. Can someone help me...

physics

A closed 2.0-L container holds 3.0 mol of an ideal gas. If 200 J of heat is added, what is the change in internal energy of the system? A. 300 J B. 150 J C. zero D. 100 J E. 200 J -Since there is no mention of work being done I thing the answer is 200J but I want to make sure?

physics (thanks)

in the context of the loop and junctions rules for electrical circuits a junction is: a) where a wire is connected to a resistor b) where a wire is connected to a battery c) where only two wire are joined d) where three or more wire are joined e) where a wire is bent My answer...

Chemistry

After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate? -I understand how to get the % H2O in the experiment but how do you determine the formula?

Chem

Determine the mass of iron heated to 85 Celsius to add to 54.0g of ice to produce water at 12.5 Celsius. The speciic heat of iron is 0.045J/g C What steps do I take to solve this problem? Thanks

chemistry

If 4.36g of a hydrate of the salt baCl2 is heated and in the process losses 0.6431g of mass, show all your work to calculate the amount of water X in the hydrate, BaCl2.XH2O

chemistry

if 4.36g of a hydrate of the salt baCl2 is heated and in the process losses 0.6431g of mass, show all your work to calculate the amount of water X in the hydrate, BaCl2.XH2O

Science

If oxygen, Carbon dioxide, and xenon gases are heated at 500k with a probable particle speed of 1094 and an average particle speed of 1234, what id the mass of an atom or molcule for each?

Chemistry

If 25 grams of copper(II) sulfate pentahydrate were heated until all water was removed, how much residue would remain?- Could someone help me understand this question? I don't understand it at all. Thanks

thermodynamic

If the energy used to heat up a block of 2kg of copper is 115.8 kJ, what is the temperature it was heated to if the starting temperature was 100oC and the specific heat capacity is 386 J/kgK. please help. thanks

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