Archive day

March 12, 2026

1,851 public questions were asked on this day.

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Two cities were both 100 miles away from the center of an earthquake, but the vibrations reached one city before they reached the other. Why might the seismic waves have traveled faster to one city than the other? A. It...
Asked by london 1 answer
The diagram below is a cross-section through the Earth. The black and white rays represent the paths of P-waves and S-waves respectively as they travel through the Earth from an earthquake epicenter. Examine the diagram,...
Asked by london 1 answer
Scientists use the properties of seismic waves to figure out the structure of Earth's interior. For example, seismic waves travel faster through denser layers than through less dense layers. Also, P waves can travel thro...
Asked by london 1 answer
An iron nail by itself is not a magnet. Which of these can make the nail act like a magnet? A. touch the nail with a magnet and then take the magnet away B. leave the nail on top of the refrigerator C. wrap the nail with...
Asked by london 1 answer
When would an electromagnet stop working? A. An electromagnet would stop working after 24 hours. B. An electromagnet would stop working when it cools below 45°F. C. An electromagnet would stop working when the electric c...
Asked by london 1 answer
How hot is the Sun’s surface?
Asked by Damianah 1 answer
Two kinds of magnets are shown below. Which of the following best describes a difference between the two magnets? A. Magnet 2 can attract more kinds of material than magnet 1 can attract. B. Magnet 2 creates a continuous...
Asked by london 1 answer
Question # 3 was the total interest earned in 45 days, rounded to the nearest penny, is $28.86. If you had invested only 1 month’s worth of the emergency fund in the saving account at a 3.15% APR and the remainder in the...
Asked by mom 1 answer
How hot is the Sun?
Asked by Damianah 1 answer
How is an electromagnet different from a permanent magnet, such as a horseshoe magnet? A. An electromagnet can be turned off and on. B. The north and south poles of an electromagnet can be reversed. C. An electromagnet i...
Asked by london 1 answer
The electromagnet in which of the following diagrams will generate a magnetic field that periodically reverses its orientation? W. X. Y. Z. A. W B. Y C. X D. Z
Asked by london 1 answer
In this excerpt, the author uses words to characterize David Barton as a man who is resentful of teaching his sister. is only happy when riding horses. is daring like his sister. is hoping to see Clara fall.
Asked by k. 1 answer
Nimon and his team are designing a system to process and sort trash at a recycling plant. They build a model of a device that will be part of the system. Then, they test the model on different types of marbles, as shown...
Asked by london 1 answer
Your fixed expenses are $1,500.45/month. Your emergency fund has 4 month’s worth of coverage. You invest half in a savings account with an interest rate of 3.15% APR and the other half in a 45-day CD with an interest rat...
Asked by mom 1 answer
When she was not listening to her father's stories or helping her mother with the housework, which, good housewife that Mrs. Barton was, she took great pains to teach her youngest daughter how to do well, Clara was as bu...
Asked by k. 1 answer
An electromagnet is a device that uses an electric current to produce a magnetic field. Electromagnets are typically composed of a piece of metal wrapped with wire and connected to a battery. The battery provides the ele...
Asked by london 1 answer
Maglev (magnetic levitation) trains float above their tracks. Electromagnets are used to make these trains levitate and move. The image below models how a maglev train levitates. The like poles of electromagnets repel ea...
Asked by london 1 answer
Sandra is experimenting to see how using cores of different sizes affects the strength of an electromagnet. She measures the strength of the electromagnet by counting how many paperclips the magnet can lift in a chain. T...
Asked by london 1 answer
Alisha made the electromagnet shown below. She used the electromagnet to pick up some paper clips. Alisha wants the electromagnet to be able to pick up even more paper clips. What should she change? A. She should add mor...
Asked by london 1 answer
The dot plot shows the number of text messages Deven sent every day for `5` days. Calculate the MAD of this data.3 5 6 8 8
Asked by jamal 1 answer
The bell shown in the picture works the same way that a doorbell works. The bell only rings when the electromagnet pushes on the beater bar. The magnetic force moves the beater bar so that it rings the bell. Most of the...
Asked by london 1 answer
write a 350 text of an observation that describes the structure and function of nerve cells. make it sound like a 7th grader
Asked by dave 1 answer
An electromagnet is created by A. running electric current through a coiled, conductive wire. B. putting a piece of soft iron in an outlet. C. rubbing two pieces of metal together quickly. D. brushing a piece of steel wi...
Asked by london 1 answer
Many buildings and homes are equipped with magnetic locks. An electromagnet holds a metal door shut with the force of its attraction. Some of these doors have a button placed nearby. Shortly after the button is pushed, t...
Asked by london 1 answer
The telegraph was one of the first machines that could send a message almost instantly to someone hundreds of miles away. The telegraph used a current to turn an electromagnet on and off. When the electromagnet was on it...
Asked by london 1 answer