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A ship in distress fires a signal flare. The flare explodes at a height of 800 feet above the ship. A rescue ship sees the flare and measures the angle of elevation from its location up to the flare to

Sorashi asked Oct 19, 2024

by Sorashi

8.6k points

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3 votes

126k views

in what way does the big bang theory require the existence of dark matter? how are physicists attempting to detect dark matter? give one proposal explanation for what dark matter might be.

Jochem Kuijpers asked Oct 19, 2024

by Jochem Kuijpers

7.2k points

1 answer

0 votes

189k views

Your company makes a p⁺n diode. They want to double its current. Which do you suggest? Why? Explain using equations. (a) doubling the donor doping (b) halving the donor doping (c) doubling the acceptor

Klay asked Oct 19, 2024

by Klay

8.0k points

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5 votes

196k views

In a tug of war, when one team is pulling with a force of 50 N and the other 10 N, what is the net force? a) 40 N b) 50 N c) 60 N d) 70 N

Nicolas Straub asked Oct 19, 2024

by Nicolas Straub

8.6k points

1 answer

2 votes

6.5k views

A bar of length L = 0.36m is free to slide without friction on horizontal rails. A uniform magnetic field B = 2.4T is directed into the plane. At one end of the rails there is a battery with emf = 12V

Smftr asked Oct 19, 2024

by Smftr

8.0k points

1 answer

0 votes

117k views

In which of the following scenarios will light experience the least refraction? O Light travels from air to glass. Light travels from water to air. Light travels from air to air. Light travels from glass

Pleshette asked Oct 19, 2024

by Pleshette

8.1k points

1 answer

2 votes

10.0k views

Rashid lifts a flower pot 0.8 m off the floor using a constant force of 20 N. How much work is done on the flower pot? a) 1.6 J (joules) b) 16 J (joules) c) 40 J (joules) d) 0.04 J (joules)

Jhedmendoza asked Oct 19, 2024

by Jhedmendoza

7.7k points

1 answer

5 votes

66.5k views

estimate the diameter of an acoustic speaker so that the sound waves at 3000 hz emitted by the speaker spread over 70 degrees. the speed of sound in air is 330 m/s.

Shirish Patel asked Oct 19, 2024

by Shirish Patel

7.7k points

1 answer

0 votes

62.3k views

The p.d. across a 30 resistor is 6V. What is the current flowing (in ampere)? A. 0.2 A B. 0.3 A C. 0.4 A D. 0.5 A

Minichate asked Oct 19, 2024

by Minichate

8.1k points

1 answer

2 votes

106k views

Calculate the de Broglie wavelength of an electron moving at 1.5% of the speed of light. A. 2.73×10⁻²⁴ B. 2.42×10⁻¹⁰ C. 242.2×10¹⁰ D. None of these

Busra asked Oct 19, 2024

by Busra

8.6k points

1 answer

3 votes

58.5k views

While Lifting a load of 200m using a lever, an effort of 80N moved through distance of 20 cm to lift the load through a distance of 4 cm.calculate the mechanical advantage

Mgottschild asked Oct 19, 2024

by Mgottschild

9.0k points

1 answer

4 votes

56.3k views

At 5 P.M. an oil tanker traveling west in the ocean at 19 kilometers per hour passes the same spot as a fuxury liner that arrived at the same spot at 4 P.M. while traveling north at 27 kilometers per

INeal asked Oct 19, 2024

by INeal

9.0k points

1 answer

3 votes

177k views

A fire truck with its siren blowing passes you. What happens to the sound of its siren as the truck moves away from you?

Jeffrey Wear asked Oct 19, 2024

by Jeffrey Wear

8.6k points

1 answer

0 votes

182k views

What is the resulting acceleration of a 100-kg object if 1,000 N of force is applied to it and it is opposed by a force of kinetic friction equivalent to 100.0 N?

Woodstok asked Oct 19, 2024

by Woodstok

8.7k points

1 answer

5 votes

66.1k views

The unit for speed is * (1 Point) O meters O seconds O m/s O m/s²

Lepsch asked Oct 19, 2024

by Lepsch

7.9k points

1 answer

0 votes

129k views

Consider a system with a certain energy content, from which we wish to extract as much work as possible. Should the system’s entropy be high or low? Is this orderly or disorderly? Structured or uniform?

SethO asked Oct 19, 2024

by SethO

8.5k points

1 answer

0 votes

203k views

Glass, rubber, or paper are all examples of what type of materials? 1) Conductors 2) Insulators 3) Semiconductors 4) Superconductors

Rishikesh Darandale asked Oct 19, 2024

by Rishikesh Darandale

7.9k points

1 answer

4 votes

48.6k views

Which of the following statements describes the concept of distance decay? A) Interaction increases with distance B) Interaction remains constant with distance C) Interaction decreases with distance D)

Driis asked Oct 19, 2024

by Driis

7.8k points

1 answer

1 vote

200k views

the length that a hanging spring stretches varies directly with the weight placed at the end of the spring. if a weight of 22lb stretches a certain spring 5in. , how far will the spring stretch if the

Haran asked Oct 19, 2024

by Haran

8.5k points

1 answer

5 votes

229k views

Why can light exhibit the Doppler effect?

Debargha Roy asked Oct 19, 2024

by Debargha Roy

8.1k points

1 answer

3 votes

167k views

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