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the real BARNY THE DINO :)

Questions and answers by the real BARNY THE DINO :)

Questions (172)

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
1. 4 answers
2. 750 views
A group of students sets up an electric circuit with wires, a battery, and a light bulb. Why is their circuit called a direct
1. 10 answers
2. 1,097 views
Physical Science B Semester Exam23 of 3023 of 30 Items Question Use the ray diagram for a lens to answer the question. The
1. 3 answers
2. 462 views
The technology that allows engineers to penetrate rock at multiple angles instead of simply a straight line is called
1. 12 answers
2. asked by the real BARNY THE DINO :)
3. 2,890 views
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
1. 4 answers
2. 547 views
Where do the forces that make atoms interact come from?(1 point)Responses from the electric fields of neutral subatomic
1. 3 answers
2. 212 views
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
1. 4 answers
2. 438 views
Which scenario describes how students can work together creatively to explore electromagnets?(1 point)Responses Three students
1. 4 answers
2. 336 views
Sally puts on wool socks and rubs her feet on a nylon carpet. How does static electricity build up in Sally?(1 point)Responses
1. 4 answers
2. 1,173 views
what provides an electric current in an electromagnetbattery iron or steel core papaer clips wire Plzz I need this fast
1. 1 answer
2. 90 views
Students built two electromagnets. The electromagnets are the same except that one has 20 wire coils around its core, and the
1. 3 answers
2. 343 views
Samuel builds four electromagnets and tests them by picking up paperclips. Here are his partial results.Coils Paperclips 8 2 16
1. 4 answers
2. 297 views
Which scenario describes how students can work together creatively to explore electromagnets?(1 point)Responses Three students
1. 3 answers
2. 172 views
You are working with a team to improve an electromagnet. Which is an effective way to communicate your ideas?(1 point)Responses
1. 4 answers
2. 238 views
What creates the magnetic force in an electromagnetelectric current battery coiled wire iron or steel core
1. 3 answers
2. 242 views
What creates the magnetic force in an electromagnetelectric current battery coiled wire iron or steel core I think it is
1. 1 answer
2. 122 views
Which statement about electromagnetic is correcttwo north poles attract each other a north pole and south pole repel each other
1. 4 answers
2. 143 views
Which is the best description of how to build an electromagnet?(1 point)Responses Wrap a wire around an iron or steel core at
1. 4 answers
2. 338 views
What causes a maglev train to hover above the track?(1 point)Responses massive batteries massive batteries attractive magnetic
1. 1 answer
2. 142 views
How does a maglev train move forward?(1 point)Responses Magnets in the sides of the tracks constantly repel and attract magnets
1. 1 answer
2. 133 views
How does a maglev train move forward?(1 point)Responses Magnets in the sides of the tracks constantly repel and attract magnets
1. 1 answer
2. 175 views
How does a maglev train move forward?(1 point)Responses Magnets in the sides of the tracks constantly repel and attract magnets
1. 5 answers
2. 344 views
Which statement about electric charges is correct?(1 point)Responses Two objects with negative charges will attract each other.
1. 3 answers
2. 573 views
The resistance in a circuit is halved. What happens to the voltage?V=IR (1 point) Responses The voltage remains the same. The
1. 1 answer
2. 368 views
The resistance in a circuit is halved. What happens to the voltage?V=IR (1 point) Responses The voltage remains the same. The
1. 3 answers
2. 178 views
The resistance in a circuit is halved. What happens to the voltage?V=IR (1 point) Responses The voltage remains the same. The
1. 4 answers
2. 376 views
How does a flashlight illustrate the Law of Conservation of Energy? (1 point)Responses Potential energy in the battery will be
1. 1 answer
2. 488 views
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
1. 3 answers
2. 294 views
Which of the following best describes an electric circuit that powers a load?(1 point)Responses Electric current flows from an
1. 1 answer
2. 211 views
Which of the following best describes an electric circuit that powers a load?(1 point)Responses Electric current flows from an
1. 4 answers
2. 627 views
Hal makes an electromagnet with a 9-volt battery, wire, and a steel rod. What is the function of electric current in his
1. 4 answers
2. 639 views
Hal makes an electromagnet with a 9-volt battery, wire, and a steel rod. What is the function of electric current in his
1. 3 answers
2. 194 views
What is the function of the core of an electromagnet?(1 point)Responses The core provides the conductor through which electric
1. 1 answer
2. 255 views
What is the function of the core of an electromagnet?(1 point)Responses The core provides the conductor through which electric
1. 1 answer
2. 174 views
What is the function of the core of an electromagnet?(1 point)Responses The core provides the conductor through which electric
1. 3 answers
2. 380 views
In 1 to 2 sentences describe a setup of pith balls that have negative charges and are hanging from the same point
1. 4 answers
2. 690 views
In 1–2 sentences, describe the factors that affect the current (amperage) in an electric circuit.
1. 4 answers
2. 647 views
A team of students builds an electrical circuit with a battery and a fan. In 1–2 sentences, describe how energy is changed
1. 4 answers
2. 572 views
In 1–2 sentences, explain how to make an electromagnet.
1. 3 answers
2. 383 views
In 1–2 sentences, explain how electromagnets move a maglev train.
1. 4 answers
2. 481 views
Which of these best describes the relationship between the incident ray, the reflected ray, and the normal for a curved
1. 1 answer
2. 211 views
Which defines a concave mirror?(1 point)Responses A concave mirror curves inward with the edges of the mirror pointing away from
1. 1 answer
2. 114 views
Parallel light waves bounce off a smooth surface. Which behavior of light does this describe?(1 point)Responses superposition
1. 2 answers
2. 125 views
Parallel light waves bounce off a smooth surface. Which behavior of light does this describe?(1 point)Responses superposition
1. 3 answers
2. 141 views
Which statement explains why white objects appear white and black objects appear black?(1 point)Responses White objects absorb
1. 1 answer
2. 209 views
Which statement correctly describes the refraction of light?(1 point)Responses As light waves enter a different medium, they
1. 1 answer
2. 107 views
Which statement correctly describes the refraction of light?(1 point)Responses As light waves enter a different medium, they
1. 3 answers
2. 154 views
Which type of wave needs a medium to travel?(1 point)Responses sound waves, because they travel by oscillating molecules sound
1. 3 answers
2. 171 views
What do both sound and light waves transfer?(1 point)Responses energy energy electricity electricity air air matter
1. 1 answer
2. 78 views
What do both sound and light waves transfer?(1 point)Responses energy energy electricity electricity air air matter PLzzz give
1. 1 answer
2. 81 views
How does an increase in amplitude affect sound and light waves?(1 point)Responses louder sound and longer wavelengths for light
1. 1 answer
2. 157 views
How does an increase in amplitude affect sound and light waves?(1 point)Responses louder sound and longer wavelengths for light
1. 1 answer
2. 100 views
What happens to the wavelength when the frequency increases?(1 point)Responses The wavelength decreases. The wavelength
1. 9 answers
2. 135 views
Wave Characteristics Quick Check5 of 55 of 5 Items Question Which of the following is true about sound waves? (1 point)
1. 4 answers
2. 292 views
A person moves away from a stationary sound source. Which phrase describes the sound perceived by the person?(1 point)Responses
1. 1 answer
2. 240 views
A person moves away from a stationary sound source. Which phrase describes the sound perceived by the person?(1 point)Responses
1. 1 answer
2. 239 views
Which image corresponds to what moment in time?(1 point) Responses The low-pitched sound corresponds to the sound source moving
1. 1 answer
2. 154 views
Sound Wave Phenomena Quick Check3 of 53 of 5 Items Question A stationary source produces a sound wave at a frequency of 100 Hz.
1. 1 answer
2. 389 views
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
1. 1 answer
2. 102 views
A person is singing in the shower. They notice that as certain notes become very loud, the shower walls vibrate. Which statement
1. 2 answers
2. 134 views
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
1. 1 answer
2. 122 views
n which case will a beat frequency most likely occur?(1 point)Responses two of the same instrument playing notes at the same
1. 1 answer
2. 85 views
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
1. 1 answer
2. 95 views
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
1. 1 answer
2. 104 views
What term is used to describe the combination of two traveling waves in the same material, which can be constructive or
1. 1 answer
2. 115 views
The wires in a piano vibrate, but fractions of the wire also vibrate at different frequencies than the whole wire. What is the
1. 1 answer
2. 103 views
Which characteristic is defined as the distance traveled by a wave crest in a given time?(1 point)Responses frequency frequency
1. 1 answer
2. 189 views
Which term describes the distance from the crest of a wave to the next crest?(1 point)Responses speed speed amplitude amplitude
1. 1 answer
2. 221 views
Which wave measure is changing by the greatest amount in the image?(1 point) Responses amplitude amplitude speed speed frequency
1. 1 answer
2. 175 views
A surfer talks about riding a 20-foot wave. Which measurement of waves is the surfer describing?(1 point)Responses amplitude
1. 1 answer
2. 156 views
There are pros and cons to both e readers and paper books do you think the pros outweigh the cons more for modern electronic
1. 1 answer
2. 119 views
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
1. 2 answers
2. 325 views
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
1. 3 answers
2. 354 views
What is the advantage of class 3 lever?(1 point)Responses It increases the mechanical advantage compared with other levers. It
1. 1 answer
2. 137 views
What is the advantage of class 3 lever?(1 point)Responses It increases the mechanical advantage compared with other levers. It
1. 6 answers
2. 263 views
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.
1. 1 answer
2. 202 views
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.
1. 2 answers
2. 287 views
The gravitational force of a lunar rover is 1,607.2 Newtons on Earth. What will the rover’s gravitational force be on the
1. 1 answer
2. 137 views
Which sentence best describes how a self-directed learner might investigate gravity?(1 point)Responses She would only repeat a
1. 1 answer
2. 377 views
Which sentence best describes a self-directed learner?(1 point)Responses She always gets good grades. She always gets good
1. 1 answer
2. 110 views
Which sentence best describes a self-directed learner?(1 point)Responses She always gets good grades. She always gets good
1. 3 answers
2. 156 views
Which student is using innovative problem-solving to investigate potential energy and kinetic energy?(1 point)Responses Meghan
1. 1 answer
2. 261 views
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
1. 1 answer
2. 143 views
Where do the forces that make atoms interact come from?(1 point)Responses from the electric fields of neutral subatomic
1. 4 answers
2. 226 views
When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What
1. 1 answer
2. 134 views
When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What
1. 3 answers
2. 140 views
Physical Science B Semester Exam13 of 3013 of 30 Items Question A bar magnet is held in place while another bar magnet is placed
1. 3 answers
2. 227 views
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)Responses increasing the
1. 1 answer
2. 81 views
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)Responses increasing the
1. 1 answer
2. 161 views
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)Responses increasing the
1. 1 answer
2. 142 views
What happens when thermal energy is applied to water?(1 point)Responses Its molecules gain kinetic energy. Its molecules gain
1. 3 answers
2. 232 views
What is the best description of heat?(1 point)Responses the measure of the average kinetic energy of the particles in an object
1. 1 answer
2. 375 views
What is the relationship between heat and thermal conductors?(1 point)Responses Thermal conductors allow all of the thermal
1. 3 answers
2. 335 views
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
1. 63 answers
2. 411 views
How does the structure of atoms in a substance determine the substance’s conductivity?(1 point)Responses If an atom’s
1. 3 answers
2. 335 views
How does the structure of atoms in a substance determine the substance’s conductivity?(1 point)Responses If an atom’s
1. 3 answers
2. 218 views
Students build four electromagnets and test them by picking up metal tacks. Here are their partial results.12 coils 4 tacks 24
1. 1 answer
2. 152 views
How do electromagnets cause a maglev train to levitate above the track? (1 point)Responses Magnets in the sides of the tracks
1. 1 answer
2. 313 views
What happens to sound waves from an object as it moves toward you?(1 point)Responses The pitch gets lower because of an increase
1. 3 answers
2. 202 views
Which combination of frequencies would produce the lowest beat frequency?(1 point)Responses 500 Hz and 600 Hz 500 Hz and 600 Hz
1. 3 answers
2. 275 views

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