05/11/21

Two charges (2.0C and 4.0C) are 0.2m apart. What is the force on the charges? SP5
Two charges (2.0C and 4.0C) are 0.2m apart. What is the force on the charges? SP5phy
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05/11/21

The speed of sound is 343 m/s in a 20°C Room. If the frequency of the sound wave is 450 Hz, what is the wavelength?
The speed of sound is 343 m/s in a 20°C Room. If the frequency of the sound wave is 450 Hz, what is the wavelength?
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05/11/21

Which assumption is part of the kinetic molecular theory?
-the particles in a gas collide and emit energy to the surroundings-the particles in a gas attract one another via intermolecular forces-the speed of the particles in a gas is directly proportional... more
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05/11/21

Evaluate the integral by interpreting it in terms of areas. integral -4 to 0 (3+Radical(16-x^2))dx
Evaluate the integral by interpreting it in terms of areas. integral -4 to 0 (3+Radical(16-x^2))dx
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05/11/21

Calculas H/W Help
A street light is at the top of a 15 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 7 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 35... more
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05/10/21

need help chemistry

1/ How would the wavelength in the image below change if the temperature was changed to 3800?2/What is the range of wavelengths for the visible spectrum?the picture is in this link :... more
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05/10/21

If 0.750 L of argon at 1.50 atm and 177oC and 0.235 L of sulfur dioxide at 95.0 kPa and 63.0oC are added to a 1.00 L flask and the flask's temperature is adjusted to 25.0oC
If 0.750 L of argon at 1.50 atm and 177oC and 0.235 L of sulfur dioxide at 95.0 kPa and 63.0oC are added to a 1.00 L flask and the flask's temperature is adjusted to 25.0oC, what is the resulting... more
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05/10/21

Find the surface area? Can you please help me solve this problem.Please. Please
Pyramid height is 12 cm. square bottoms is 18 cm and 18cm. My answer is 864 cm^2. Is that right. Please explain and tell me the answer.
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05/10/21

A badly tuned automobile engine can release about 50 moles of carbon monoxide per hour. At 35 ◦C,
A badly tuned automobile engine can release about 50 moles of carbon monoxide per hour. At 35 ◦C, what volume of carbon monoxide is released in a six-hour period if the atmospheric pressure is 740... more
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05/10/21

What is the volume occupied by 0.17 grams of gaseous H2S at 27◦C and 380 torr?
What is the volume occupied by 0.17 grams of gaseous H2S at 27◦C and 380 torr?
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05/10/21

1. The atom is made up of a. Protons and electrons in the nucleus surrounded by neutrons b. Protons and neutrons in the nucleus surrounded by electron
c. Neutrons and electrons in the nucleus surrounded by protons.d. Electrons in the nucleus surrounded by protons and neutrons
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05/10/21

13. The half life in radioactive decay is a. The time it takes for all of a radioactive isotope to decay b. The time it takes for ½ of a radioactive isotope to decay
c.The number of nuclei that decay in 1 second.d. The number of nuclei that remain after 1 second.
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05/10/21

11. Radioactivity is when a. An electron is removed from an atom b. An atom emits a photon when an electron goes from one energy level to another
c. an unstable nucleus emits particlesd. a nucleus absorbs a neutron
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05/10/21

Calculate the amount of Aluminum sulfate produced from 15.0 grams of Aluminum
Calculate the amount of Aluminum sulfate produced from 15.0 grams of Aluminum
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05/10/21

Calculate the amount of iron (III) sulfate produced from 15.0 grams of iron. Please just answer with the number, do not include the units. *
Calculate the amount of iron (III) sulfate produced from 15.0 grams of iron. Please just answer with the number, do not include the units. *
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05/10/21

7. What the frequency of the photon emitted when an electron goes from the 4th energy level (E4 = -0.85eV) to the 3rd energy level (E3 = -1.51eV) b. 2.05 x1014hz c. 3.65 x1014hz d. 5.70 x1014hz
a. 1.59 x 1014hzshow calculations! thank you
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05/10/21

need help chemistry its urgent !!

1/  put the following in order from lowest to highest frequency?microwaves, x-rays, radiowaves2/ Which of the objects in the image below emits radiation with a wavelength of approximately .01m? the... more
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05/10/21

What is the wavelength of the sound?
A sound having a frequency of 299 Hz travels through air at 393 m/s.What is the wavelength of the sound?Answer in units of m.
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05/10/21

How far is Andrew from the cannon?
... assume that Andrew is so close to the cannon, that he saw the cannon instantly. so the question is how far can a sound wave travel in the time given? ...Andrew hears the sound of the firing of... more
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05/10/21

How wide is the lake if 7 seconds later she heard her own echo?
Anna was on vacation and came across an echo lake. Wanting to know how far she had to swim to get across the lake to the other side, she yelled across “Hello!”How wide is the lake if 7 seconds... more
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05/10/21

12. Which of the following are examples of radioactivity a. Alpha decay b. Beta decay c. Gamma decay d. All of the above
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05/10/21

A particular nucleus has 22 protons and 26 neutrons. How would it be written in nuclear notation (_22^)〖Ti〗_^48 (_22^)〖Ti〗_^26 (_26^)〖Fe〗_^22 (_26^)〖Fe〗_^48

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05/10/21

5. According to the Bohr model of Hydrogen, when an electron goes from one energy level to another a. It emits a proton b. It emits a neutron c. It emits a photon d. It emits a alpha particle
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05/09/21

Calculate the theoretical yield of CO2 based on the 3.5 g of NaHCO3 and record a grams to grams three step conversation
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05/08/21

If 2.47 moles of calcium chloride reacts with fluorine gas, how many grams of calcium fluoride are made?
Need help with this question
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