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An industrial steam shutoff valve is designed to operate with 40 lb of effort force. The valve will encounter 200 lb of resistance force applied to a 3-inch diameter axle. What is the required actual MA

Xavier FRANCOIS asked Oct 19, 2024

by Xavier FRANCOIS

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1 vote

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Derive the expression for the RMS pressure of a square wave and a triangular wave. Compare the value of the RMS pressure for sinusoidal, square and triangular waves. Assume all three waves have the same

Crusy asked Oct 19, 2024

by Crusy

8.7k points

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4 votes

162k views

ΔH=30 k J mol⁻¹, ΔS=75 J K⁻¹mol⁻¹. Find boiling temperature at 1 atm.

Dzzxjl asked Oct 19, 2024

by Dzzxjl

8.1k points

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0 votes

91.5k views

You are on in-line skates at the top of a small hill. Your potential energy is equal to 1,000 J. The last time you checked, your mass was 60.0 kg.If you start rolling down this hill, your potential energy

Apollon asked Oct 19, 2024

by Apollon

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1 vote

88.8k views

A golfer hits a shot to a green that is elevated 2.50 m above the point where the ball is stuck. The ball leaves the club at a speed of 19.0 m/s at an angle of 54.0o above the horizontal. It rises to its

ITech asked Oct 19, 2024

by ITech

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3 votes

177k views

If secθ−tanθ=x, then show that secθ+tanθ= 1/x and hence find the values of cosθ and sinθ.

Sylvie asked Oct 19, 2024

by Sylvie

8.1k points

1 answer

0 votes

157k views

A 40 kg child slides down a 5.0m long slide as shown. as the child slides, there is a kinetic friction force between the child and the slide with a coeffiecient of kinetic friction of 0.20. how much work

Eric Fournie asked Oct 19, 2024

by Eric Fournie

8.3k points

1 answer

5 votes

20.4k views

If two objects of the same size fall through air at different speeds, which encounters the greater air resistance? A) The faster object B) The slower object C) Both encounter the same air resistance D)

Reed Hermes asked Oct 19, 2024

by Reed Hermes

8.4k points

1 answer

4 votes

161k views

Protective aprons must be worn if one is likely to receive _ or more: 1. 5 mrads/hr 2. 5 rad/hr 3. 5 mrads/min 4. 5 rads/min

Qpaycm asked Oct 19, 2024

by Qpaycm

7.4k points

1 answer

2 votes

163k views

Describe the characteristics of concrete with a density of 135-165 lbs/ft^3 and a compressive strength ranging from 2,000 psi to over 8,000 psi.

Scott Sosna asked Oct 19, 2024

by Scott Sosna

7.5k points

1 answer

0 votes

75.4k views

Compare the kinetic energy of a 20,000-kg truck moving at 110 km/h with that of an 80.0-kg astronaut in orbit moving at 27,500 km/h. a) The truck has more kinetic energy. b) The astronaut has more kinetic

Ceiroa asked Oct 19, 2024

by Ceiroa

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5 votes

178k views

In the theory of relativity, the mass of a particle with speed v is: m = f(v) = m₀ / (1 - v²/c²), where m₀ is the rest mass of the particle, and c is the speed of light in a vacuum. Find the inverse function

JCarlosR asked Oct 19, 2024

by JCarlosR

7.6k points

1 answer

2 votes

224k views

A rigid 5.50-L pressure cooker contains steam initially at 100.0∘C under a pressure of 1.00 atm. Assume that the molar specific heat at constant volume V is 25.9 J/mol·K and the molar specific heat at

Raphael Cunha asked Oct 19, 2024

by Raphael Cunha

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5 votes

169k views

1. A school bus traveling at 12.1 m/s has a momentum of 157 635 kg m/s. What is the mass of the bus? 2. The parking brake on a 1200 kg automobile has broken and the vehicle has reached a momentum of 7800

MikkelT asked Oct 19, 2024

by MikkelT

8.4k points

1 answer

1 vote

89.2k views

Calculate the amount of energy needed to convert 17.0 g of water at 29.0 °c to steam at 100.0°c.

Carlos Herrera Plata asked Oct 19, 2024

by Carlos Herrera Plata

8.5k points

1 answer

1 vote

200k views

A radioactive sample has a mass of 500 grams. How much remains after two half-lives?

Steve Byrne asked Oct 19, 2024

by Steve Byrne

9.3k points

1 answer

3 votes

108k views

Which of the following is TRUE regarding the slice thickness of an image reconstructed from a helical scan a. on a multi-row detector scanner the thickness is equal to the beam collimation b. on a single-row

MrTimotheos asked Oct 19, 2024

by MrTimotheos

8.1k points

1 answer

2 votes

95.5k views

State the general solution of Maxwell's equations for the scalar potential V(n,t) and vektorpotential A(r,t) in terms of sources, and include the source-freeterms.

Mowgli asked Oct 19, 2024

by Mowgli

8.1k points

1 answer

3 votes

203k views

Two aircraft rivets, one iron and the other copper, are placed in a calorimeter that has an initial temperature of 20.°c. the data for the rivets are as follows: iron copper mass (g) 30.0 20.0 initial

Marius Kjeldahl asked Oct 19, 2024

by Marius Kjeldahl

8.1k points

1 answer

2 votes

145k views

2b, how do you find the work done without the force??

Carl Sednaoui asked Oct 19, 2024

by Carl Sednaoui

7.8k points

1 answer

1 vote

20.6k views

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