
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective

The electric potential at a position located a distance of 21.9 mm from a positive point charge of 6.80×109c and 14.5 mm from a second point charge is 1.14 kv. calculate the value of the second char

Suppose that she pushes on the sphere tangent to its surface with a steady force of f = 75 n and that the pressurized water provides a frictionless support. how long will it take her to rotate the sph

One dimensional, steadystate conduction with uniform internal energy generation occurs in a plane wall with a thickness of 50mm and a constant thermal conductivity of 5 w/(m*k). for these conditions,

In the previous question, the person had an initial velocity of 8m/s and a constant acceleration of −4m/s2. how would the maximum distance he travels to the right of the origin change if instead his

Which of these provides the most creative method to date rocks based on their position in a layer? Select one: a. Law of Superposition b. Law of Unconformities c. Principle of Uniformitarianism d. Pr
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If the electric field strength in air exceeds 3.0 ✕ 106 n/c, the air becomes a conductor. using this fact, determine the maximum amount of charge that can be carried by a metal sphere 1.8 m in radiu

If a=i+2j+ka=i+2j+k and b=i+12j+kb=i+12j+k, find a unit vector with positive first coordinate orthogonal to both aa and bb.

How much charge is moved by the battery in c? you may assume the specific heat of baby formula is approximately the same as for water, and the specific heat of glass is 0.840 j/(g⋅°c), and the spec

Four point charges, each of magnitude 18.45 µc, are placed at the corners of a square 21.7 cm on a side. if three of the charges are positive and one is negative, find the magnitude of the force expe

Does the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°c have to be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100°c? why or why not?

Consider a 0.2mm diameter air bubble in a liquid. determine the pressure difference between the inside and outside of the air bubble if the surface tension at the airliquid interface is
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Calculate the process capability ratio (cp) for both the temperature and thickness variables. is the polymercoating process able to meet the engineering standards 99.7% of the time? explain.

A student standing on the ground throws a ball straight up. the ball leaves the student's hand with a speed of 6 m/s when the hand is 2.0 m above the ground. how long is the ball in the air before it
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A spherical cavity is excised from the inside of the sphere. the cavity has radius a4 and is centered at position h⃗ , where h⃗ <34a, so that the entire cavity is contained within the larger sph
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As a sailboat sails 59.0 m due north, a breeze exerts a constant force f with arrow1 on the boat's sails. this force is directed at an angle west of due north. a force f with arrow2 of the same magnit

A proton moves 2.00 cm parallel to a uniform electric field of 243 v/m. how much work is done by the field on the proton?
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A lead ball is dropped in a lake from a diving board 5.13 m above the water. it hits the water with a certain velocity and then sinks to the bottom with the same constant velocity. it reaches the bott
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A fire hose ejects a stream of water at an angle of 39.5 ° above the horizontal. the water leaves the nozzle with a speed of 26.0 m/s. assuming that the water behaves like a projectile, how far from
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Increase of green house gases, due to human activity, is warming the oceans. This causes changes in climate. Name three Earth spheres which interact in this process. Justify your answer.

Lizzie loves to stargaze at night. She has noticed that the moon appears to change shape over the course of the month, and she wants to investigate why this happens. She hypothesizes that the relation
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A bicycle tire has a pressure of 6.00 ✕ 105 N/m2 at a temperature of 20.0°C and contains 1.90 L of gas. What will its pressure be (in Pa) if you let out an amount of air that has a volume of 150 cm

Potassium chlorate decomposes to produce 20 g of solid potassium chloride. Oxygen gas is also produced. Which best describes the mass of oxygen? It is more than the mass of potassium chloride. It is l
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Robby skateboards 0.50 blocks to his friends house in 1.2 minutes. what is his speed/9366704/aa0c54ad?utm_source=registration
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A helicopter is traveling at 86km/h at an angle of 35° to the ground. what is the value of Ax and Ay?
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Water is being heated in a closed pan on top of a range while being stirred by a paddle wheel. during the process, 30 kj of heat is transferred to the water, and 5 kj of heat is lost to the surroundin
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Two compact sources of sound oscillate in phase with a frequency of 130 hz where the speed of sound is 340 m/s. at a point that is 3.40 meters from one source and 3.87 meters from the other, the ampli

The tractortrailer unit is moving down the incline with a speed of 5 mi/hr when the driver brakes the tractor to a stop in a distance of 4 ft. estimate the percent increase n in the hitchforce compo

The gulf stream off the tip of florida has a flow of 35 sv (1 sv = 109 m3/s). what is the flow in milliliters per minute? what mass of water flows past the tip in 24 hours? how much time is required f
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The cantilever footing is used to support a wall near its edge a so that it causes a uniform soil pressure under the footing. determine the uniform distribution loads, wa and wb, measured in lb/ft at
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Problem #3 : a spherical pressure tank is made of 1050 colddrawn steel (sy = 84 ksi, su = 100 ksi). the tank has a 40" inner diameter, has a ½" wall thickness, and is pressurized cyclically between

In a physics lab experiment, a spring clamped to the table shoots a 18 {\rm \;g} ball horizontally. when the spring is compressed 21 {\rm \;cm} , the ball travels horizontally 4.9 {\rm \;m} and lands

If the joint is subjected to an axial force of p = 8.1 kn , determine the average shear stress developed in each of the 6mm diameter bolts between the plates and the members.

How many milliliters of water at 23 °c with a density of 1.00 g/ml must be mixed with 180 ml (about 6 oz) of coffee at 95 °c so that the resulting combination will have a temperature of 60 °c? assu

Four identical metal spheres have charges of qa = 8.0 μc, qb=2.0 μc, qc=+5.0 μc, and qd=+12.0 μc. (a) two of the spheres are brought together so they touch, and then they are separated. which sp

Determine the change in internal energy of 8.00 kg of water when it is all boiled to steam at 100 ∘c. assume a constant pressure of 1.00 atm.
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At what temperature would a 1.45 m nacl solution freeze, given that the van't hoff factor for nacl is 1.9? kf for water is 1.86 ∘c/m . express your answer with the appropriate units.

A submersible craft is being designed to operate in the atlantic ocean. the density ρ of salt water is 1.025 grams per cubic centimeter. for a maximum design depth of 300 feet, what is the minimum pr

A sky diver with a mass of 70 kg jumps from an aircraft. the aerodynamic drag force acting on the sky diver is known to be fd = kv @, where k = 0:25n s2=m2. determine the maximum speed of free fall fo

A rightward force of 302 n is applied to a 28.6 kg crate to accelerate it across the floor. thye coefficient of friction between the crate and the floor is 0.750. determine the acceleration
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An object has a position given by r⃗ = [2.0 m + (3.00 m/s)t] i^ + [3.0m−(4.00 m/s2)t2] j^, where all quantities are in si units. what is the magnitude of the acceleration of the object at time t =

An automobile engine slows down from 3000 rpm to 900 rpm in 3.0 s.(a) calculate its angular acceleration, assumed constant.rad/s2(b) calculate the total number of revolutions the engine makes in this

A lightrail commuter train accelerates at a rate of 1.55 m/s2. how long (in s) does it take to reach its top speed of 80.0 km/h, starting from rest?

A ground state hydrogen atom absorbs a photon of light having a wavelength of 94.92 nm. it then gives off a photon having a wavelength of 4.050 × 103 nm. what is the final state of the hydrogen atom?
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A diskshaped merrygoround of radius 3.16 m and mass 147 kg rotates freely with an angular speed of 0.724 rev/s. a 52.3kg person running tangential to the rim of the merrygoround at 3.38 m/s jump

A car travels up a hill at a constant speed of 40 km/h and returns down the hill at a constant speed of 60 km/h. calculate the average speed for the round trip.
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In a video game, a flying coconut moves at a constant velocity of 20 meters/second. The coconut hits an obstacle and moves in the opposite direction with the constant velocity of 10 meters/second. Wha

Which of these best describe the energy transformation that occur to generate electricity from wind energy
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Acceleration is defined as the rate of change for which characteristic? position time displacement velocity
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Before you begin your lab, you need to form a hypothesis that reflects which material, voltage, and number of winds you think will produce the strongest electromagnet