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Which of the following has a heat of formation equaling zero? A) H B) N C) O D) F E) None of the above

MilkBottle asked Oct 17, 2024

by MilkBottle

7.8k points

1 answer

1 vote

27.8k views

A very thin rod made of an insulating material has a linear charge density of 41.0nC/m. It lies along the line y=−15.0 cm, with one endpoint at x=0 and the other at x=40.0 cm. What is the electric field

Aron asked Oct 17, 2024

by Aron

8.3k points

1 answer

4 votes

233k views

The loudness of a person's voice depends on the... A) Volume of air in the lungs B) Speed of sound in the atmosphere C) Frequency of vocal cord vibrations D) Size of the mouth

Cgull asked Oct 17, 2024

by Cgull

7.4k points

1 answer

2 votes

66.3k views

A wooden cylinder floats vertically in water with half of its length immersed. What is the density of wood? a. Greater than the density of water b. Equal to the density of water c. Less than the density

Cjbrog asked Oct 17, 2024

by Cjbrog

8.5k points

1 answer

3 votes

175k views

Today we learned about the Hertzian Dipole. Out teacher told us that the length of the wire connecting the two capacitor plates is l=λ2. He also stated that there is a no more phase shift (I don't know

Drew Shafer asked Oct 17, 2024

by Drew Shafer

7.8k points

1 answer

2 votes

177k views

Two particles are projected from the same point with the same speed u such that they have the same range r, but different maximum heights, h₁ and h₂ . which of the following is correct A. R²=4 h₁h₂ B.

Sneha Bansal asked Oct 17, 2024

by Sneha Bansal

8.4k points

1 answer

5 votes

233k views

An Associated Press article on climate change said, "Some of the ice shelf’s disappearance was probably during times when the planet was 36 degrees Fahrenheit (2 degrees Celsius) to 37 degrees Fahrenheit

Itcropper asked Oct 17, 2024

by Itcropper

7.9k points

1 answer

1 vote

222k views

Two forces that are F1 =15N (east) and F2 = 7N (west) act on a body in a frictionless floor. The displacement of the body is 6 m, what is the work done by forces on the body?

Matovu Ronald asked Oct 17, 2024

by Matovu Ronald

8.3k points

1 answer

0 votes

98.0k views

Suppose that the setup of the preceding problem is immersed in an unknown liquid. If 18 fringes per centimeter are now seen along the slide, what is the index of refraction of the liquid? a. 1.33 b. 1.

Ashbay asked Oct 17, 2024

by Ashbay

8.6k points

1 answer

5 votes

125k views

Two sources emit microwaves of wavelength = 2.7 cm in phase. How far must they be from each other so that the first and third constructive interference fringes on the same side of the central peak are

Nazariy Vlizlo asked Oct 17, 2024

by Nazariy Vlizlo

8.8k points

1 answer

3 votes

188k views

A block of iron has a density of 7.874 g/cm³ and a mass of 5905.5 grams. If the block is 15 cm long and 5 cm wide, what is the height?

Balbino asked Oct 17, 2024

by Balbino

9.0k points

1 answer

0 votes

233k views

The Ingenuity Mars helicopter (above) has a mass of 1.8kg. and climbs to a height of 75m. This decreases the chemical store in its battery by 500J. What is the gravitational field strength g on Mars?

Istos asked Oct 17, 2024

by Istos

7.7k points

2 answers

4 votes

217k views

At noon, ship A is 180 km west of ship B. Ship A is sailing south at 20 km/h and ship B is sailing north at 40 km/h. How fast is the distance between the ships changing at 4:00PM ? ______ km/h

Deset asked Oct 17, 2024

by Deset

8.1k points

1 answer

2 votes

35.6k views

Advantages of electric motors over other devices

Dnyaneshwar Harer asked Oct 17, 2024

by Dnyaneshwar Harer

8.3k points

1 answer

4 votes

178k views

Subject : Plant layout &design This is a subjective question, hence-you have to write your answer in the Text-Field given below What are the symptoms of bad layout?

Brian Gottier asked Oct 16, 2024

by Brian Gottier

8.0k points

1 answer

5 votes

106k views

Predict the motion. What happens when you push a box when two different and opposing forces are applied to it? a) Acceleration b) Uniform motion c) Deceleration d) Static equilibrium

Nguyen Kien asked Oct 16, 2024

by Nguyen Kien

7.8k points

1 answer

3 votes

150k views

Why is polyester not suitable for summer wear ?

Bittu asked Oct 16, 2024

by Bittu

8.4k points

1 answer

3 votes

63.6k views

Amy wishes to measure the specific heat capacity of a piece of metal. She places the 75 g piece of metal in a pan of boiling water, then drops it into a cup holding 50 g of water at 22°C. The metal and

Rluta asked Oct 16, 2024

by Rluta

8.0k points

1 answer

3 votes

91.3k views

A cargo barge is loaded in a saltwater harbor for a trip up a freshwater river. If the rectangular barge is 3.5 m by 22.0 m and sits 0.90 m deep in the harbor, how deep will it sit in the river?

XXJohnRamboXx asked Oct 16, 2024

by XXJohnRamboXx

8.1k points

1 answer

0 votes

60.9k views

When CHARGING a capacitor in a RC circuit, how does the current change with time? a) increases exponentially b) decreases exponentially c) stays constant d) decreases at a constant rate e) increases at

DPdl asked Oct 16, 2024

by DPdl

9.2k points

1 answer

1 vote

202k views

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