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A student is studying chemical changel and adds a solid substance to a liquid substance. Which statement best describes what the student should observe if a chemical reaction is occurring? O The liquid

Dan Wolchonok asked Oct 14, 2024

by Dan Wolchonok

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2 answers

1 vote

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Devise an arrangement of mirrors allowing you to see the back of your head. What is the minimum number of mirrors needed for this task? a. Two mirrors are needed. b. Three mirrors are needed. c. Four mirrors

Aldin asked Oct 14, 2024

by Aldin

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1 answer

2 votes

113k views

Do Uranus and Neptune radiate more energy into space than they receive from the Sun?

Gcamp asked Oct 14, 2024

by Gcamp

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1 answer

5 votes

185k views

Approximately 20.0gm of milk at 6.0oC is added into a cup containing 270.0 gm of weak tea. The specific heat of weak tea is 3.91 x 103J kg-1 oC-1 and the final temperature of the milk - tea mixture is

Airfang asked Oct 14, 2024

by Airfang

8.7k points

1 answer

0 votes

156k views

an investor is building a hydropower station. it's 5 megawatt capacity and utility is paying 26 cents per kilowatt hour. how much revenue will the hydropower station make per year? PLEASE TRY TO SOLVE

Xaviel asked Oct 14, 2024

by Xaviel

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1 answer

3 votes

185k views

A ball is dropped from a height of 78.4 m above the ground. How long does it take to hit the ground?

Mysteryos asked Oct 14, 2024

by Mysteryos

7.8k points

1 answer

2 votes

34.1k views

When calculating power in a reactive or inductive AC circuit, the true power is A. more than the apparent power. B. less than the apparent power in a reactive circuit and more than the apparent power in

Mike Crawford asked Oct 14, 2024

by Mike Crawford

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1 answer

5 votes

164k views

What can a > 75 mA shock do to a person?

Jeffrey Rennie asked Oct 14, 2024

by Jeffrey Rennie

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1 answer

1 vote

141k views

The amount of evaporator surface required for superheating depends on the temperature difference between the media being cooled and: A The amount of sub-cooling B The refrigerant temperature C The temperature

Melisa asked Oct 14, 2024

by Melisa

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1 answer

5 votes

141k views

A. During the 2.0s fuel burn, what vertical distance does the rocket cover, and what is its final velocity? b. After fuel depletion, assuming a deceleration of 10 m/s², estimate the maximum height the

Johnny Cheesecutter asked Oct 14, 2024

by Johnny Cheesecutter

8.3k points

1 answer

5 votes

178k views

The lifting force, f, exerted on an airplane wing varies jointly as the area, a, of the wing's surface and the square of the plane's velocity, v. the lift of a wing with an area of 160 square feet is 31,

Ulentini asked Oct 14, 2024

by Ulentini

9.5k points

1 answer

4 votes

138k views

The element that has a valence configuration of 2s1 is _______. A. K B. Cs C. Na D. Li E. Rb

Bill Dueber asked Oct 14, 2024

by Bill Dueber

8.4k points

1 answer

2 votes

37.8k views

Three identical 91.1 kg deer are standing on a flat 274 kg rock that rests on a frictionless ice-covered pond. At the sound of a gunshot, the deer scatter with velocities v⃗ 1= (13.5 m/s)i^+ (4.2 m/s)j^

Rangi Lin asked Oct 14, 2024

by Rangi Lin

8.6k points

1 answer

1 vote

206k views

. a wheatstone bridge is formed by 1 strain gauge (r1) and three resistors (r2, r3, and r4). the initial resistance of all of them is the same 120 ohm. the gauge factor of the strain gauge (gf) is 1.5.

Felguerez asked Oct 14, 2024

by Felguerez

7.6k points

1 answer

1 vote

136k views

The velocity profile in a 4-cm-diameter transporting 20 C water is given by v(r)=0.1(1-2500r²)m/s. If the viscosity of the water is 1 mPa s and the density is 997 kg/m³, the shearing stress at the wall

Gadolin asked Oct 14, 2024

by Gadolin

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1 answer

2 votes

180k views

Which of the following can involve the rapid mass movement of rock down a steep slope? Check all that are true. creep rockfall landslide slump

Satyam Singh asked Oct 14, 2024

by Satyam Singh

8.7k points

1 answer

1 vote

201k views

The diameter of vessel B shrinks, and the hydrostatic pressure in the compartment denoted by letter C increases. What happens to GFR? 1) decreases 2) Stays the same because these two changes have opposing

Ahmad Sharif asked Oct 14, 2024

by Ahmad Sharif

8.1k points

1 answer

3 votes

182k views

What is the oxidation number of oxygen in HNO3?

Djama asked Oct 14, 2024

by Djama

7.4k points

1 answer

4 votes

105k views

What is the proper unit used for all types of energy? a. j b. kg c. m/s

Greyson Parrelli asked Oct 14, 2024

by Greyson Parrelli

8.6k points

1 answer

3 votes

129k views

If something goes from potential energy to kinetic energy to potential energy, is mechanical energy conserved? A) Yes B) No C) It depends on friction D) Only in a vacuum

Grallen asked Oct 14, 2024

by Grallen

8.5k points

1 answer

5 votes

102k views

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