Answers by visitors named: the real BARNY THE DINO :)

what provides an electric current in an electromagnet battery iron or steel core papaer clips wire Plzz I need this fast

2 years ago

Students built two electromagnets. The electromagnets are the same except that one has 20 wire coils around its core, and the other has 40 wire coils around its core. Which is the best comparison?(1 point) Responses The electromagnet with 20 coils will be...

2 years ago

Samuel builds four electromagnets and tests them by picking up paperclips. Here are his partial results. Coils Paperclips 8 2 16 7 24 11 30 ? Which is the best prediction for the number of paperclips the electromagnet with 30 coils will pick up? (1 point)...

2 years ago

Which scenario describes how students can work together creatively to explore electromagnets?(1 point) Responses Three students follow the directions of their teacher for building an electromagnet. Three students follow the directions of their teacher for...

2 years ago

You are working with a team to improve an electromagnet. Which is an effective way to communicate your ideas?(1 point) Responses Build your own electromagnet and then tell other students how you did it. Build your own electromagnet and then tell other stu...

2 years ago

What creates the magnetic force in an electromagnet electric current battery coiled wire iron or steel core

2 years ago

What creates the magnetic force in an electromagnet electric current battery coiled wire iron or steel core I think it is electric current am i right

2 years ago

Which statement about electromagnetic is correct two north poles attract each other a north pole and south pole repel each other a north pole and a south pole attract each other two south poles attract each other

2 years ago

Which is the best description of how to build an electromagnet?(1 point) Responses Wrap a wire around an iron or steel core at least ten times. Wrap a wire around an iron or steel core at least ten times. Attach a wire to one end of a battery, wrap the wi...

2 years ago

What causes a maglev train to hover above the track?(1 point) Responses massive batteries massive batteries attractive magnetic force attractive magnetic force electric current electric current repellant magnetic force

2 years ago

How does a maglev train move forward?(1 point) Responses Magnets in the sides of the tracks constantly repel and attract magnets in the sides of the train. Magnets in the sides of the tracks constantly repel and attract magnets in the sides of the train....

2 years ago

A group of students sets up an electric circuit with wires, a battery, and a light bulb. Why is their circuit called a direct circuit?(1 point) Responses The light bulb is directly connected to the battery. The light bulb is directly connected to the batt...

2 years ago

The resistance in a circuit is halved. What happens to the voltage? V=IR (1 point) Responses The voltage remains the same. The voltage remains the same. The voltage is doubled. The voltage is doubled. The voltage is increased by a factor of 4. The voltage...

2 years ago

How does a flashlight illustrate the Law of Conservation of Energy? (1 point) Responses Potential energy in the battery will be converted to kinetic energy. Potential energy in the battery will be converted to kinetic energy. It is an electric circuit thr...

2 years ago

Which is an example of a load in an electric circuit?(1 point) Responses wiring wiring on-off lever on-off lever 9-volt battery 9-volt battery speaker speaker

2 years ago

Which is an example of a load in an electric circuit?(1 point) Responses wiring wiring on-off lever on-off lever 9-volt battery 9-volt battery speaker speaker I thin that it is the 9 volt battery am i right

2 years ago

Which of the following best describes an electric circuit that powers a load?(1 point) Responses Electric current flows from an energy source directly to the load. Electric current flows from an energy source directly to the load. Electric current is gene...

2 years ago

Which of the following best describes an electric circuit that powers a load?(1 point) Responses Electric current flows from an energy source directly to the load. Electric current flows from an energy source directly to the load. Electric current is gene...

2 years ago

Hal makes an electromagnet with a 9-volt battery, wire, and a steel rod. What is the function of electric current in his electromagnet? (1 point) Responses Electric current determines the strength of the magnet. Electric current determines the strength of...

2 years ago

What is the function of the core of an electromagnet?(1 point) Responses The core provides the conductor through which electric current flows. The core provides the conductor through which electric current flows. The core is the part that becomes magnetiz...

2 years ago

What is the function of the core of an electromagnet?(1 point) Responses The core provides the conductor through which electric current flows. The core provides the conductor through which electric current flows. The core is the part that becomes magnetiz...

2 years ago

In 1 to 2 sentences describe a setup of pith balls that have negative charges and are hanging from the same point

2 years ago

In 1–2 sentences, describe the factors that affect the current (amperage) in an electric circuit.

2 years ago

A team of students builds an electrical circuit with a battery and a fan. In 1–2 sentences, describe how energy is changed from one form to another in their electric circuit.

2 years ago

In 1–2 sentences, explain how to make an electromagnet.

2 years ago

In 1–2 sentences, explain how electromagnets move a maglev train.

2 years ago

Which of these best describes the relationship between the incident ray, the reflected ray, and the normal for a curved mirror?(1 point) Responses The angle that the incident ray makes with the normal is the same as the angle that the reflected ray makes...

2 years ago

Which defines a concave mirror?(1 point) Responses A concave mirror curves inward with the edges of the mirror pointing away from the viewer. A concave mirror curves inward with the edges of the mirror pointing away from the viewer. A concave mirror curve...

2 years ago

Parallel light waves bounce off a smooth surface. Which behavior of light does this describe?(1 point) Responses superposition superposition diffraction diffraction absorption absorption reflection reflection

2 years ago

Parallel light waves bounce off a smooth surface. Which behavior of light does this describe?(1 point) Responses superposition superposition diffraction diffraction absorption absorption reflection reflection PlzzzzzHURRY I neeeeed this

2 years ago

Which statement explains why white objects appear white and black objects appear black?(1 point) Responses White objects absorb all colors of light, and black objects absorb only black light. White objects absorb all colors of light, and black objects abs...

2 years ago

Which statement correctly describes the refraction of light?(1 point) Responses As light waves enter a different medium, they bend towards the normal if they slow down and bend away from the normal if they speed up. As light waves enter a different medium...

2 years ago

Which statement correctly describes the refraction of light?(1 point) Responses As light waves enter a different medium, they bend towards the normal if they slow down and bend away from the normal if they speed up. As light waves enter a different medium...

2 years ago

Which type of wave needs a medium to travel?(1 point) Responses sound waves, because they travel by oscillating molecules sound waves, because they travel by oscillating molecules light waves, because they travel by oscillating molecules light waves, beca...

2 years ago

What do both sound and light waves transfer?(1 point) Responses energy energy electricity electricity air air matter

2 years ago

What do both sound and light waves transfer?(1 point) Responses energy energy electricity electricity air air matter PLzzz give me the right answwr

2 years ago

How does an increase in amplitude affect sound and light waves?(1 point) Responses louder sound and longer wavelengths for light louder sound and longer wavelengths for light higher-pitched sound and longer wavelengths for light higher-pitched sound and l...

2 years ago

What happens to the wavelength when the frequency increases?(1 point) Responses The wavelength decreases. The wavelength decreases. The wavelength increases The wavelength increases The wavelength stays the same The wavelength stays the same The wavelengt...

2 years ago

Wave Characteristics Quick Check 5 of 55 of 5 Items Question Which of the following is true about sound waves? (1 point) Responses Sound would move faster in a pool of water than in a pool of Jello. Sound would move faster in a pool of water than in a poo...

2 years ago

A person moves away from a stationary sound source. Which phrase describes the sound perceived by the person?(1 point) Responses lower pitch and shorter wavelength lower pitch and shorter wavelength lower pitch and longer wavelength lower pitch and longer...

2 years ago

Which image corresponds to what moment in time? (1 point) Responses The low-pitched sound corresponds to the sound source moving away; its wavelength is shorter. The high-pitched sound corresponds to the sound source getting closer; its wavelength is long...

2 years ago

Sound Wave Phenomena Quick Check 3 of 53 of 5 Items Question A stationary source produces a sound wave at a frequency of 100 Hz. The wave travels at 1125 feet per second. A car is moving toward the sound source at a speed of 100 feet per second. What is t...

2 years ago

When a guitar string is plucked, what part of the standing wave is found at the fixed ends of the string?(1 point) Responses the harmonics the harmonics the nodes the nodes the antinodes the antinodes the resonance

2 years ago

A person is singing in the shower. They notice that as certain notes become very loud, the shower walls vibrate. Which statement describes this effect? (1 point) Responses The note is one of the nodes for the shower. The note is one of the nodes for the s...

2 years ago

A piano tuner hears a beat frequency when using a tuning fork to tune a piano wire. The piano tuner should adjust the tension in the wire to(1 point) Responses increase the amount of interference and increase the beat frequency. increase the amount of int...

2 years ago

n which case will a beat frequency most likely occur?(1 point) Responses two of the same instrument playing notes at the same frequency two of the same instrument playing notes at the same frequency two of the same instrument playing notes at slightly dif...

2 years ago

How can a person sing into a piano and cause a piano wire to vibrate?(1 point) Responses The person sings at the same frequency as the piano wire, called the beat frequency. The person sings at the same frequency as the piano wire, called the beat frequen...

2 years ago

What term is used to describe the combination of two traveling waves in the same material, which can be constructive or destructive depending on whether the waves meet in phase or out of phase?(1 point) Responses wavelength wavelength interference interfe...

2 years ago

The wires in a piano vibrate, but fractions of the wire also vibrate at different frequencies than the whole wire. What is the term for the softer notes produced by these different frequencies?(1 point) Responses interference interference harmonics harmon...

2 years ago

Which characteristic is defined as the distance traveled by a wave crest in a given time?(1 point) Responses frequency frequency speed speed wavelength wavelength amplitude PLzzz HUrry and answer correctly I have a D in this class so im trying to riase it

2 years ago

Which term describes the distance from the crest of a wave to the next crest?(1 point) Responses speed speed amplitude amplitude frequency frequency wavelength Plzzz answer correctly and hurrrrrryyyyyy

2 years ago

Which wave measure is changing by the greatest amount in the image? (1 point) Responses amplitude amplitude speed speed frequency frequency wavelength PLzzz hurry and answer correctly

2 years ago

A surfer talks about riding a 20-foot wave. Which measurement of waves is the surfer describing?(1 point) Responses amplitude amplitude speed speed wavelength wavelength frequency PLzzzz hurry and answer correctly

2 years ago

There are pros and cons to both e readers and paper books do you think the pros outweigh the cons more for modern electronic reader or for good old fashonied paper books? it simply comes down to personal prefrences as opposed to rational descion making. w...

2 years ago

A gardener uses a wheelbarrow to move 20 kilograms of soil from a compost pile to a flower bed, a distance of 53 meters. The wheelbarrow has a mass of 17 kilograms. He expends 94.5 Newtons of force. How much work does the gardener do?(1 point) Responses 1...

2 years ago

A mechanic wants to use a compound pulley to lift a go-kart from the ground to work table, a distance of 1.2 meters. Without the pulley, 1,620 Newtons of force would be needed to lift the go-kart. If the pulley has a mechanical advantage of 4, how much fo...

2 years ago

What is the advantage of class 3 lever?(1 point) Responses It increases the mechanical advantage compared with other levers. It increases the mechanical advantage compared with other levers. It decreases the distance over which force needs to be applied....

2 years ago

Gardeners would need to use 960 Newtons of force to lift a potted tree 45 centimeters onto a deck. Instead, they set up a lever. If they press the lever down 2 meters, how much force do they use to lift the tree?(1 point) Responses 432 N 432 N 216 N 216 N...

2 years ago

A team of students builds a lever as a science project. They expend 10,300 Joules of energy to lift some bricks with the lever. If 6,283 Joules of energy are applied to the bricks, what is the lever’s efficiency?(1 point) Responses 0.61% 0.61% 61% 61% 164...

2 years ago

The gravitational force of a lunar rover is 1,607.2 Newtons on Earth. What will the rover’s gravitational force be on the Moon? On Earth, g = 9.8m/s2. On the Moon, g = 1.62 m/s2. (1 point) Responses 265.7 N 265.7 N 992.1 N 992.1 N 164 N 164 N 2,603.7 Plzz...

2 years ago

Which sentence best describes how a self-directed learner might investigate gravity?(1 point) Responses She would only repeat a gravity experiment that she researched online. She would only repeat a gravity experiment that she researched online. She would...

2 years ago

Which sentence best describes a self-directed learner?(1 point) Responses She always gets good grades. She always gets good grades. She makes sure to complete all class projects and homework. She makes sure to complete all class projects and homework. She...

2 years ago

Which student is using innovative problem-solving to investigate potential energy and kinetic energy?(1 point) Responses Meghan replicates a demonstration of potential energy and kinetic energy she found in her science textbook. Meghan replicates a demons...

2 years ago

How much more kinetic energy does a 6-kilogram bowling ball have when it is rolling at 16 mph (7.1 meters per second) than when it is rolling at 14 mph (6.2 meters per second)? KE=12mv2(1 point) Responses 1.3 J 1.3 J 266.5 J 266.5 J 151.2 J 151.2 J 35.9 J...

2 years ago

Where do the forces that make atoms interact come from?(1 point) Responses from the electric fields of neutral subatomic particles from the electric fields of neutral subatomic particles from the electric fields of charged molecules from the electric fiel...

2 years ago

When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What happens afterward?(1 point) Responses They bond and accelerate together. They bond and accelerate together. They remain in the sa...

2 years ago

Physical Science B Semester Exam 13 of 3013 of 30 Items Question A bar magnet is held in place while another bar magnet is placed near it. The second bar magnet spins around and attaches to the first magnet on one end. Which statement is correct about the...

2 years ago

Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point) Responses increasing the number of turns in the coil of wire increasing the number of turns in the coil of wire increasing the distances between the tu...

2 years ago

What happens when thermal energy is applied to water?(1 point) Responses Its molecules gain kinetic energy. Its molecules gain kinetic energy. The water creates steam as soon as thermal energy is applied. The water creates steam as soon as thermal energy...

2 years ago

What is the best description of heat?(1 point) Responses the measure of the average kinetic energy of the particles in an object or substance the measure of the average kinetic energy of the particles in an object or substance the transfer of thermal ener...

2 years ago

What is the relationship between heat and thermal conductors?(1 point) Responses Thermal conductors allow all of the thermal energy in one object or substance to be easily transferred to another object or substance. Thermal conductors allow all of the the...

2 years ago

Which scenario shows radiation?(1 point) Responses Eggs boil in a pot of water. Eggs boil in a pot of water. The air under a reading lamp is warmed. The air under a reading lamp is warmed. Air warmed by a floor radiator rises to the top of a room, forcing...

2 years ago

Which pair of objects will have an attractive electric force? Pair Object 1 Charge Object 2 Charge A -2 -1 B -3 +1 C +3 +1 D +1 +2(1 point) Responses Pair A Pair A Pair D Pair D Pair C Pair C Pair B Plzzzz answer correctly this is a final

2 years ago

How does the structure of atoms in a substance determine the substance’s conductivity?(1 point) Responses If an atom’s nucleus is positively charged, the substance is a good conductor. If an atom’s nucleus is positively charged, the substance is a good co...

2 years ago

Students build four electromagnets and test them by picking up metal tacks. Here are their partial results. 12 coils 4 tacks 24 coils 9 tacks 36 coils 13 tacks 48 coils ? tacks Which is the best prediction for the number of nails the electromagnet with 48...

2 years ago

How do electromagnets cause a maglev train to levitate above the track? (1 point) Responses Magnets in the sides of the tracks constantly repel and attract magnets in the sides of the train. Magnets in the sides of the tracks constantly repel and attract...

2 years ago

Physical Science B Semester Exam 23 of 3023 of 30 Items Question Use the ray diagram for a lens to answer the question. The illustration shows a candle as an object to the left of a concave lens beyond focus on the left. One ray from the candle falls on t...

2 years ago

What happens to sound waves from an object as it moves toward you?(1 point) Responses The pitch gets lower because of an increase in wavelength. The pitch gets lower because of an increase in wavelength. The pitch gets lower because of an increase in freq...

2 years ago

Which combination of frequencies would produce the lowest beat frequency?(1 point) Responses 500 Hz and 600 Hz 500 Hz and 600 Hz 10 Hz and 15 Hz 10 Hz and 15 Hz 500 Hz and 501 Hz 500 Hz and 501 Hz 10 Hz and 20 Hz Plzzzz hurrrry and answer correclty

2 years ago

A sound has a higher pitch than a bell. Which quantity must also be higher in this sound than in the bell?(1 point) Responses speed speed amplitude amplitude frequency frequency wavelength PLzzz answer correclty and quicklyyy

2 years ago

the real BARNY THE DINO :)

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