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Physics
Page 45
Questions (146,487)
Which of the following determines if a material is a conductor or an insulator?
a proton movement b number of electrons c
1 answer
asked by
shoto
165 views
You can decrease resistance by making the wire in a circuit smaller.
True False
3 answers
asked by
re
100 views
Why are open systems inappropriate for studying the conservation of mass?
Heat can escape from or enter the system. Matter may be
1 answer
asked by
no
163 views
The formula vw=f⋅λ describes the relationship between the speed of a wave (vw), and its frequency (f) and wavelength (λ).
For
3 answers
asked by
wiggle
267 views
A certain lever system is only 30% efficient. What could make it more efficient? (1 point)
Responses Have more than one person
1 answer
asked by
kriox
255 views
what causes a maglev train to hover above the track
Attractive, Magnetic force Electric current Repellent, magnetic force Massive
2 answers
asked by
shoto
110 views
Which way does the energy flow?
a from the brick and iron to the heater b from the heater to the brick and iron c energy does not
2 answers
asked by
A
89 views
Which term describes the distance from the crest of a wave to the next crest?(1 point)
Responses speed speed frequency frequency
3 answers
asked by
no name
91 views
Electromagnet Current Intensity Number of Turns in the Wire
W medium 10 X low 10 Y medium 50 Z low 50 Which electromagnet will
3 answers
asked by
Help the ELA Kid😔✏️📃
292 views
Amari is researching an electric car. He finds this graph, which shows how much range, measured in kilometers, the car gains
1 answer
asked by
Madeline
161 views
Your pencil and notebook are both sitting motionless on your desk. Which of the following explanations correctly explains which
4 answers
asked by
kali
280 views
Magnets in front of the train constantly pull magnets in the train toward them
O Magnets in the sides of the tracks constantly
4 answers
asked by
Hlo
183 views
Colin rode his bike 20 meters in 3 seconds.
Is this speed velocity or acceleration.
1 answer
asked anonymously
64 views
A force acts on an object. Which option describes an action that could prevent the object from moving?(1 point)
Responses a force
2 answers
asked by
Carlos Jimenez
221 views
A ball is thrown into the air with an initial upward velocity of 48 ft/s. Its height (h) in feet after t seconds is given by the
1 answer
asked by
909
100 views
Which analogy best describes voltage?(1 point)
Responses diameter of a pipe through which water move length of the pipe through
4 answers
asked by
analogy
221 views
Which falling object has the least kinetic energy when it collides on the ground?
a 120 Kg of water falling at 12 m/s b 12 Kg of
3 answers
asked by
social studies
137 views
A student is designing an investigation of the distribution of charges in conductors. She will use two conducting spheres
4 answers
asked by
Anonymous ;)
458 views
Quick check on modeling waves
6 answers
asked by
Susan smith
794 views
What is the conclusion about the potential difference(voltmeter readings) in a parallel electric circuit
6 answers
asked by
Lesedi
4,033 views
A 6 kg. piece of metal displaces 1 liter of water when submerged. What is its density?
The volume of the water dispaced was
4 answers
asked by
Jarrad Schomaker
4,633 views
Use the image to complete the statement.
Compared to wave A, wave B has a _____. (1 point) Responses longer wavelength and
1 answer
asked by
Bazol
505 views
Matter and Temperature Quick Check
What is the best description of thermal energy?
7 answers
asked by
no name
620 views
Which situation best demonstrates the law of conservation of energy?
a the potential energy of a ball being dropped from a cliff
3 answers
asked by
A
180 views
If the value of F is positive, this tells us that the two objects are:
a this doesn't give us any information about the objects b
4 answers
asked by
A
210 views
Which unit is used to measure force?(1 point)
A. watt B. joule C. newton D. kilogram
4 answers
asked by
wiggle
1,316 views
Which is one difference between visible and non-visible light?(1 point)
Responses Visible light can be seen by the unaided human
7 answers
asked anonymously
306 views
Energy and Forces Unit Test
Question --- Answer In models of magnetic and electric fields, why are field vectors depicted by
5 answers
asked by
korinthia
356 views
A ball of iron with a mass of 252 g was heated using 2263 J of energy. The initial temperature was 547 deg * C What was the
1 answer
asked by
I.D.C.I.I.C.I.S.S.I.N.T.D.W.H.T.B.D.
134 views
In which situation is the magnitude of the total force greater than the magnitude of each of the individual forces? (1 point)
O
5 answers
asked by
Idb
605 views
If a 35 kg zombie runs at a speed of 3.0 m/s. What is the zombie's kinetic energy?
a 53 J b 158 J c 105 J d 315 J
3 answers
asked by
no name
170 views
Mrs. Wilson is driving her car to the store. She drives on a street where the speed limit is 50 mph. Then she turns onto a
4 answers
asked by
no name
306 views
An Olympic bodybuilder lifts a 1325 kg weight a vertical distance of 2.5 m off the ground. What potential energy do the weights
3 answers
asked by
no name
154 views
the work function for metallic Caesium is 2.14 eV. Calculate the kinetic energy and the speed of the electrons ejected by light
4 answers
asked by
Anonymous
1,299 views
A roller coaster heads into a circular loop with radius 5m. At what minimum speed must the coaster go at the top of the loop to
5 answers
asked by
anonymous
1,708 views
a bomb is dropped drom an airplane at an altitude of 14,400 feet how long would it take to reach the ground? (because the motion
4 answers
asked by
Nancy
1,577 views
A single wave pulse is sent along a thick rope that's tied to a thin rope, which in turn is attached to a wall. Reflection of
4 answers
asked by
Kayla
2,696 views
A 500 g block lies on a horizontal tabletop. The coefficient of kinetic friction between the block and the surface is 0.25. The
5 answers
asked by
Lissa.
5,364 views
A rock is thrown upward with a velocity of 18 meters per second from the top of a 27 meter high cliff , and it misses the cliff
5 answers
asked by
Briana
1,269 views
A gas takes up a volume of 17 liters, has a pressure of 2.3 atm, and a temperature of 299K. If I raise the temperature to 350K
5 answers
asked by
sam
5,647 views
A police officer in a patrol car parked in a 70 Km/h speed zone observes a passing automobile might be intoxicated,the officer
4 answers
asked by
benjamin
4,533 views
i think its B.
Adding a _____________ to an electric circuit would increase the magnetic field around a wire. A. insulator B.
10 answers
asked by
matt
3,471 views
what happens when a bowl of ice cream is left uneaten on a counter in a warm room
A. heat is transferred from the air to the ice
4 answers
asked anonymously
428 views
A 0.6-g peanut is burned beneath 50 g of water, which increases in temperature from 22degreesC to 50 degreesc. What is the exact
4 answers
asked by
Rachel
3,430 views
A car starting at 12:00 noon travels west at a speed of 30 kph. Another car starting from the same point at 2:00 PM travels
3 answers
asked by
@jayr
1,711 views
In earlier learning sequences we described how a static magnetic field cannot change the speed (and therefore kinetic energy) of
2 answers
asked by
BJ
521 views
A sheet of paper 40mm wide and (1.5 x 10^-2) thick is placed between a metal foil of the same width is used to make a 2.0 UF
5 answers
asked by
benjamin
2,026 views
A spherical metal dome of radius 15 cm is electrically charged. It has a positive charge of +2.5 μC distributed uniformly on
4 answers
asked by
Ink
1,642 views
A car leaves an intersection after a light turns green. It starts from rest and reaches a speed of 13.4 m/s in 5.0 s. The radius
4 answers
asked by
clara
2,317 views
A 1200 kg car rounds a curve of radius 70m with a banking of 12°. The car is traveling 90 km/h, will a frictional force be
4 answers
asked by
Yinka
4,820 views
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