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An object moving at a velocity of 30 m/s slows Ito a stop in 7 seconds. What was its acceleration? *

Byeongin Yoon asked Oct 15, 2024

by Byeongin Yoon

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What is an example of mechanical energy? the sound of a trumpet the light from a fire a rolling wheel the heat from a fire

Comma asked Oct 15, 2024

by Comma

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5 votes

191k views

An electron traveling at 3.7 times 10^5 m/s has an uncertainty in its velocity of 1.63 times 10^5 m/s. What is the uncertainty in its position? Express your answer with the appropriate units. delta x =

Lukas Schmelzeisen asked Oct 15, 2024

by Lukas Schmelzeisen

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Is the total volume proportional to the number of sound sources? What happens to the loudness when playing a sound sample using 4 identical devices instead of one? Will it get 4 times louder? A) Yes, it

Roque asked Oct 15, 2024

by Roque

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4 votes

163k views

All the following are true of using solar photocells, EXCEPT ________. 1) great for decentralized power production, away from power plants and grids 2) very low carbon footprint 3) with continued production,

Guyja asked Oct 15, 2024

by Guyja

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4 votes

1.2k views

Concerning an object moving with Uniform Circular Motion (UCM), the kind of motion that was the foundation for the explanation of the motion of planets since the time of Plato to the time of Kepler, which

Yemu asked Oct 15, 2024

by Yemu

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1 answer

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62.3k views

Natural radiation refers to: a) Radiation produced by human activities b) Radiation originating from natural sources like the sun and rocks c) Radiation emitted by nuclear power plants d) Radiation caused

Gushitong asked Oct 15, 2024

by Gushitong

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1 vote

119k views

If a function has a second derivative of f′′(x)=x2−10x+16 and two inflection points, what are their x-values? A. (2,8) B. (4,6) C. (6,4) D. (8,2)

Daniel Widdis asked Oct 15, 2024

by Daniel Widdis

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1 answer

5 votes

59.0k views

What two horizontal forces are present as a car is pushed down the driveway? a) Frictional force and gravitational force b) Applied force and air resistance c) Normal force and tension force d) Buoyant

Muffel asked Oct 15, 2024

by Muffel

8.6k points

1 answer

0 votes

44.9k views

Andrea pushes a 16.7 kg toy car on a frictionless, horizontal surface. If the toy car is initially at rest, what is the speed of the toy car after she pushes it for 6.6 s with an acceleration of +4.98

Ahmed Taher asked Oct 15, 2024

by Ahmed Taher

7.7k points

1 answer

1 vote

196k views

While the balloon is still accelerating, the pilot controls the balloon by pouring some sand from the bags. Explain how this affects the upward acceleration of the balloon. a) The upward acceleration increases

Vladimirs Matusevics asked Oct 15, 2024

by Vladimirs Matusevics

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1 vote

97.9k views

In ray tracing for a spherical mirror, which ray is reflected back on itself? A None of these B Incoming ray parallel to the optical axis C Incoming ray through the focal point D Incoming ray hitting the

Brandon Dixon asked Oct 15, 2024

by Brandon Dixon

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175k views

A fan is to accelerate quiescent air to a velocity of 12 m/s at a rate of 3 m³/s. If the density of air is 1.15 kg/m³, what is the minimum power that must be supplied to the fan?

Eldiyar Talantbek asked Oct 15, 2024

by Eldiyar Talantbek

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1 vote

163k views

"How do the wavelengths of ultraviolet radiation compare to microwave radiation?" a) Ultraviolet radiation has shorter wavelengths than microwave radiation b) Ultraviolet radiation has longer wavelengths

HellCatVN asked Oct 15, 2024

by HellCatVN

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1 answer

3 votes

132k views

Cold water (Cp = 4.18 KJ/kg*K) enters a heat exchanger at 15 degree C at a rate of 0.5 kg/s, where it is heated by hot air (Cp = 1.0 KJ/kg*K) that enters the heat exchanger at 50 degree C at a rate of

Lukaszkups asked Oct 15, 2024

by Lukaszkups

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3 votes

121k views

Recycling one glass bottle will light a 100 watt bulb for how long? A. 4 hours B. 40 hours C. 15 minutes D. 1 hour

DinoSaadeh asked Oct 15, 2024

by DinoSaadeh

8.3k points

1 answer

1 vote

162k views

Which state of matter commonly found on earth has a free surface plasma solid liquid or gas

Leusrox asked Oct 15, 2024

by Leusrox

7.6k points

1 answer

2 votes

77.1k views

LAYERS OF THE EARTH THAT SURROUNDS AND PROTECTS US FROM DANGEROUS RAYS FROM THE SUN A.Atmosphere B.Biosphere C.Hydrosphere D.Lithosphere

Hoaphumanoid asked Oct 15, 2024

by Hoaphumanoid

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2 answers

2 votes

221k views

3 things observed in photoelectric effect not explained by the wave theory of light is ____________

Fpunkt asked Oct 15, 2024

by Fpunkt

8.1k points

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1 vote

57.6k views

joe is at a football game and the weather is very cold. his hands get very cold, so he decides to use a hand warmer to warm his hands. he has to squeeze the packet together, and in a few minutes, it gets

Charley Wu asked Oct 15, 2024

by Charley Wu

8.4k points

1 answer

2 votes

70.6k views

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