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meli

Questions and answers by visitors named meli

Questions (43)

What is the function of the core of an electromagnet?(1 point)Responses The core provides the conductor through which electric
1. 5 answers
2. 1,019 views
What happens when a cold spoon is placed in hot soup?(1 point)Responses The soup’s molecules have more potential energy, so
1. 4 answers
2. 772 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. 587 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. 40 answers
2. 576 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. 3 answers
2. 322 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. 5 answers
2. 689 views
Which sentence best describes a self-directed learner?(1 point)Responses She makes sure to complete all class projects and
1. 4 answers
2. 561 views
Which is an example of a load in an electric circuit?(1 point)Responses wiring wiring speaker speaker 9-volt battery 9-volt
1. 4 answers
2. 364 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. 46 answers
2. 1,329 views
Which scenario best describes a scientist who is studying thermal energy?(1 point)Responses She works with a team, telling each
1. 4 answers
2. 392 views
Where do the forces that make atoms interact come from?(1 point)Responses from the electric fields of neutral subatomic
1. 1 answer
2. 111 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. 3 answers
2. 130 views
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
1. 3 answers
2. 141 views
what is the reduced fraction of 3 28/36
1. 1 answer
2. 390 views
48,567 kilograms what is the mass of the boulder in metric tons
1. 3 answers
2. 999 views
Why does an ice cube melt even in a cold glass of water?(1 point)Responses The ice cube is still colder than the water, so
1. 2 answers
2. 229 views
What is the best description of the conclusion of a scientific investigation?(1 point)Responses The conclusion uses reasoning to
1. 4 answers
2. 322 views
How does a heater in one corner of a fish aquarium warm the whole aquarium?(1 point)Responses The heater warms the glass of the
1. 2 answers
2. 250 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. 446 views
A force of 30 N is applied to a ball, and it takes the ball 1.5 seconds to travel 4 meters. What is the work done on the ball?
1. 3 answers
2. 214 views
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. 3 answers
2. 315 views
What is the advantage of class 3 lever?
1. 1 answer
2. 62 views
A soccer ball and bowling ball, with the same areas and different masses, are dropped at the same time. How will their motions
1. 1 answer
2. 104 views
A soccer ball and bowling ball, with the same areas and different masses, are dropped at the same time. How will their motions
1. 1 answer
2. 184 views
Which student is using innovative problem-solving to investigate potential energy and kinetic energy?(1 point)Responses Lisa
1. 4 answers
2. 526 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. 4 answers
2. 286 views
When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What
1. 2 answers
2. 166 views
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
1. 2 answers
2. 122 views
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)Responses increasing the
1. 1 answer
2. 115 views
What happens when thermal energy is applied to water?(1 point)Responses The water creates steam as soon as thermal energy is
1. 1 answer
2. 173 views
Which statement describes a difference between plasmas and gases?(1 point)Responses Plasmas are affected by magnetic fields, but
1. 1 answer
2. 130 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. 129 views
What is the relationship between heat and thermal conductors?(1 point)Responses Thermal conductors have no effect on heat.
1. 4 answers
2. 208 views
How does the structure of atoms in a substance determine the substance’s conductivity?(1 point)Responses If an atom’s outer
1. 4 answers
2. 566 views
Students build four electromagnets and test them by picking up metal tacks. Here are their partial results.12 coils 4 tacks 24
1. 96 answers
2. 297 views
How do electromagnets cause a maglev train to levitate above the track? (1 point)Responses Magnets in the sides of the tracks
1. 3 answers
2. 170 views
Which option best describes the speed of light?(1 point)Responses The speed of light is an absolute quantity. It varies based on
1. 2 answers
2. 129 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. 1 answer
2. 64 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. 119 views
Which statement regarding sound traveling in air is correct?(1 point) Responses A loud sound travels faster than a quiet sound.
1. 1 answer
2. 162 views
Which statement about the effect of temperature on the speed of sound is correct?(1 point)Responses As temperature increases,
1. 3 answers
2. 92 views
Which forms of electromagnetic radiation are arranged in order of increasing energy?(1 point) Responses infrared, gamma rays,
1. 1 answer
2. 164 views
A student is using a weak computer to design a logo. If the weak computer is the only constraint, should the student use the
1. 1 answer
2. 132 views

Answers (5)

THANK YOUUUU “ not there” GOT 18/18 !! they are in the correct spot just make sure to carefully read what question your on and the answer i case your teacher puts it in a different order, other than that these answers good
answer is -14
84 ft for rectangular prism
is-they-person-do-this-not-who-now
i think its bee wax

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