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Jon

Questions (757)

A piece of metal is bent into a rectangle and has a length which is 5 times as long as its width. If the perimeter of the piece
1. 2 answers
2. 1,306 views
What 20th or 21st century person is similiar to either Brutus, Ceasar, Cassius or Anthony from Shakespeare's play Julius Ceasar
1. 2 answers
2. 533 views
I do not understand how to figure out my problem below and can not find an example in my book. Can someone give me a suggestion
1. 4 answers
2. 626 views
1)A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to rest over a distance of 79.0
1. 2 answers
2. 1,613 views
1)An elevator is moving down with an acceleration of 1.40 m/s^2. A 14.5 kg block hangs from a spring balance fixed to the roof
1. 1 answer
2. 1,532 views
A car accelerates from rest at 5 m/s^2 for 5 seconds. It moves with a constant velocity for some time, and then decelerates at 5
1. 1 answer
2. 831 views
A boy is cycling at a constant speed along a straight road to his school. The postions of the boy after fixed time intervals are
1. 5 answers
2. 1,543 views
1)The velocity of sound in air is 332 m/s. If the unit of length is km and the unit of time is hour, what is the value of
1. 4 answers
2. 1,190 views
A boy starts from point A and moves 5 units toward the east, then turns back and moves 3 units toward the west. What is the
1. 1 answer
2. 691 views
1)How is displacement different from distance? Under what conditions can an object travel a certain distance and yet its
1. 2 answers
2. 1,135 views
1)What can you say about the motion of a body if:a. its displacement-time graph is a straight line inclined with the time axis
1. 1 answer
2. 1,561 views
1)The velocity of sound in air is 332 m/s. If the unit of length is km and the unit of time is hour, what is the value of
1. 1 answer
2. 497 views
A ball is thrown vertically upward with a speed of 1.53 m/s from a point 4.21 m above the ground. Calculate the time in which
1. 4 answers
2. 553 views
My problem:ln(2x-3)=ln 9-ln(x-3) The answer I had which is wrong was 3, (3/2). The correct answer should be (9/2). I can get the
1. 1 answer
2. 367 views
I need help finding the correct answer. I got it wrong on my homework and am studying for my test and need to know how to do it.
1. 1 answer
2. 504 views
1)Which of the following statements about X rays is incorrect?A)x rays darken photographic plates B)x rays can penetrate soft
1. 2 answers
2. 2,287 views
1)An electromagnetic wave is produced by:an accelerating charged particle or changing magnetic fields. 2)Find the period of an
1. 5 answers
2. 779 views
1)An electromagnetic wave has a wavelength of 6.2 x 10^14 n. What is the frequency of the wave?3.00 x 10^8 * 6.2 x 10^14 1.8 x
1. 1 answer
2. 647 views
1)When does a magnetic field induce maximum EMF in a wire moving with a constant velocity?when the wire is moved at right angles
1. 1 answer
2. 867 views
1)A 0.050 m long wire is carrying a current of 2.0 A at right angles to a 0.15 T magnetic field. What is the magnitude of the
1. 1 answer
2. 650 views
1)A current-carrying conductor is kept at right angles to the direction of a magnetic field. What happens to the force acting on
1. 1 answer
2. 2,000 views
1)When the currents in two parallel metal conductors are in the same direction, the conductors ___ each other.A)attract B)repel
1. 3 answers
2. 2,299 views
1)An increase in the velocity of wire moving perpendicular through a magnetic field increases the induced EMF.true. confused me
1. 1 answer
2. 1,013 views
1)The direction of the force on doubly ionized helium atoms(alpha particles)moving at right angles to a magnetic field is
1. 1 answer
2. 1,128 views
1)The polarity of an electromagnet can be determined using the second right-hand rule.true. 2)Current passing through a
1. 1 answer
2. 1,270 views
A current of 5.0 A flows for 20.0 minutes through a bulb and delivers 15000 J of electric energy to the bulb. What is the
1. 3 answers
2. 1,582 views
I need to find the future population using the model P=42+20ln(11t+1)t= time in years I need to find when it will be 180. I have
1. 1 answer
2. 460 views
A 2.00 resistor, and a 12.0 resistor are connected in parallel across a 20.0-V battery. What is the current flowing through the
1. 1 answer
2. 2,084 views
Four resistors of 10.0 each are connected in parallel. A combination of four resistors of 10.0 each is connected in series along
1. 1 answer
2. 891 views
1)Bulb P is rated 60 W, 110 V and bulb Q is rated 100 W, 110 V. Which of the bulbs has the higher resistance?A)they have the
1. 2 answers
2. 1,552 views
1)A 2.0-V battery is connected in a circuit with an ammeter and an unknown resistor, P. The current is observed to be 0.70 A.
1. 5 answers
2. 1,231 views
1)A 15.0 resistor and a 20.0 resistor are connector in parallel. A 5.00 resistor is connected in series with this parallel
1. 1 answer
2. 660 views
1)Four resistors of 10.0 each are connected in parallel. A combination of four resistors of 10.0 each is connected in series
1. 3 answers
2. 3,824 views
1)If a resistor is added to a parallel circuit, the equivalent resistance:A)increases B)decreases C)remains the same D)becomes
1. 2 answers
2. 1,435 views
1)In a series circuit, each circuit element has the same:A)current B)voltage C)capacitance D)resistance I got A 2)If a resistor
1. 2 answers
2. 2,086 views
1)When two bodies are charged, the total charge before and after charging remains the same because of:A)quantization of charges
1. 1 answer
2. 1,674 views
1)Which of the following statements is true about electric forces?A)electric forces cause objects to only attract each other.
1. 3 answers
2. 3,817 views
1)An ____ lens is used to produce a real image.A)convex B)concave C)plane D)diverging The link you gave me confused me b/c the
1. 3 answers
2. 1,317 views
1)A 5.0 cm real object is placed at a distance of 5.0 cm from a concave mirror of focal length 10 cm. Find the size of the
1. 3 answers
2. 738 views
1)Which of the following objects can set fire to a piece of paper in the presence of sunlight?A)doulble concave lens B)convex
1. 2 answers
2. 2,332 views
1)At least_____ light rays are required to locate the image formed by a lens.2 2)What is the nature of an image formed by a
1. 2 answers
2. 668 views
1)A beam of light passes from air to ethanol, with index of refracton of 1.36. If the angle of incidence ( 1)is 30.0 d/C, then
1. 1 answer
2. 1,004 views
1)An object of height 4 cm is placed at a distance of 20 cm from a convex lens of focal length 10 cm. Find the nature of the
1. 1 answer
2. 1,169 views
1)A 5.0 cm real object is placed at a distance of 5.0 cm from a concave mirror of focal length 10 cm. Find the size of the
1. 0 answers
2. 649 views
True/False1)The lens of the eye has a fixed focal length. False. 2)What must be the minimum height of a plane mirror so that a
1. 1 answer
2. 1,336 views
True/False1)Specular reflection obeys the laws of reflection while diffuse reflection does not. False. drwls said its true but I
1. 1 answer
2. 984 views
1)A 5.0 cm real object is placed at a distance of 30.0 cm from a concave mirror of focal length 10.0 cm. Find the location of
1. 7 answers
2. 1,989 views
1)A convex lens is used to obtain an enlarged virtual image.false. 2)The lens of the eye has a fixed focal length. false.
1. 1 answer
2. 1,017 views
1)A convex mirror of focal length 10 cm forms an upright and magnified image of a real object placed at a distance of 20 cm from
1. 1 answer
2. 1,636 views
1)Specular reflection obey the laws of of reflection while diffuse reflection does not?false. They both obey 2)A convex mirror
1. 1 answer
2. 581 views
1)As a sound source moves away from a stationary observer, the number of waves will.A)increase B)decrease C)remain the same
1. 5 answers
2. 965 views
A boy is blowing a whistle of frequency 536 Hz and walking toward a wall with a speed of 1.64 m/s. What frequency of the
1. 3 answers
2. 1,452 views
How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The
1. 1 answer
2. 701 views
1)As a sound source moves away from a stationary observer, the number of waves will.A)increase B)decrease C)remain the same
1. 1 answer
2. 1,015 views
1)As a sound source moves away from a stationary observer, the number of waves will.decrease 2)How fast should a car move toward
1. 4 answers
2. 1,341 views
1)As a sound source moves away from a stationary observer, the number of waves will.decrease 2)How fast should a car move toward
1. 0 answers
2. 891 views
1)A wave created when two different waves meet will have an amplitude greater than the individual waves because of.A)destructive
1. 1 answer
2. 575 views
I revised my answers below. Thank you
1. 0 answers
2. 345 views
1)For incomplete cancellation to occur, opposite pulses must have.A)equal amplitudes B)different energies C)equal pulses D)equal
1. 7 answers
2. 769 views
A boy is blowing a whistle of frequency 536 Hz and walking toward a wall with a speed of 1.64 m/s. What frequency of the
1. 0 answers
2. 615 views
A car moving at 16.0 m/s, passes an observer while its horn is pressed. Find the difference between the frequencies of sound
1. 0 answers
2. 834 views
How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The
1. 0 answers
2. 659 views
As a sound source moves away from a stationary observer, the number of waves will.decrease
1. 2 answers
2. 602 views
The Doppler effect is a change in the ______of a sound.pitch
1. 0 answers
2. 662 views
If a wave has a period of .02 seconds and a speed of 4 m/s, what is its wavelength?.08 m
1. 0 answers
2. 464 views
A wave created when two different waves meet will have an amplitude greater than the individual waves because of.constructive
1. 1 answer
2. 561 views
For the medium to remain undisturbed as two pulses pass the same point, they must have.different amplitudes
1. 0 answers
2. 499 views
For incomplete cancellation to occur, opposite pulses must have.equal displacements
1. 2 answers
2. 589 views
What happens when a wave reaches the boundary of a new media?it would reflect back.
1. 0 answers
2. 445 views
You are creating a transverse wave in a rope by shaking your hand from side to side. Without changing the distance that your
1. 4 answers
2. 1,005 views
You are creating a transverse wave in a rope by shaking your hand from side to side. Without changing the distance that your
1. 1 answer
2. 1,226 views
You are creating a transverse wave in a rope by shaking your hand from side to side. Without changing the distance that your
1. 1 answer
2. 565 views
Shaking a towel up and down would create what type of wave in the towel?surface
1. 1 answer
2. 468 views
True/FalseThe medium determines the speed through which most mechanical waves will travel. True
1. 1 answer
2. 567 views
BTW I just want a yes, no, and/or hint for these questions to save some time.True/False Doubling the amplitude of a wave will
1. 0 answers
2. 516 views
Everyone's help is greatly appreciated. I have put alot of thought into all of my answers, I may have used the incorrect formula
1. 1 answer
2. 595 views
Raul pushes a stalled car with a force of 204 N. If the required force decreases at a constant rate from 204 N to 44.0 N for a
1. 1 answer
2. 710 views
Carol and Bruno drag a box of mass 58.0 kg along a frictionless floor. Carol pushes the box with a force of 11.4 N at an angle
1. 1 answer
2. 1,006 views
A 1600 kg vehicle moves with a velocity of 19.5 m/s. Calculate the power required to reduce the velocity to 3.20 m/s in 11.0 s.I
1. 1 answer
2. 631 views
A cable pulls a crate of mass 19.0 kg across the floor in 6.8 s. If the total distance traveled is 5.40 m, find the power used
1. 1 answer
2. 468 views
How much heat must be removed from 0.15 kg of water to cool it from 95 d/C to 25 d/C? The specific heat capasity of water is
1. 1 answer
2. 1,654 views
A student lifts a 1.2 kg bag from her desk, which is 0.59 m high, to a locker that is 2.9 m high. What is the gravitational
1. 1 answer
2. 651 views
A 75 kg skydiver dives out of her airplane 3000 m in the air. How much potential energy will she have left 1/4 of the way down?P
1. 1 answer
2. 784 views
How much work is a 200 kg weightlifter doing while he holds a 1000 kg barbell stationary .75 m over his head?1000(.75) = 7350 J
1. 1 answer
2. 590 views
Which of the following physical properties can be used to measure temperature using a thermometer?A)volume B)pressure C)density
1. 1 answer
2. 799 views
True/FalseThe thermal energy of the particles in a gas is related to the temperatureof the gas. answer:true
1. 1 answer
2. 461 views
True/FalseA hot object has more thermal energy than a similar cold object only because of greater kinetic energy. answer:true
1. 1 answer
2. 848 views
Raul pushes a stalled car with a force of 204 N. If the required force decreases at a constant rate from 204 N to 44.0 N for a
1. 0 answers
2. 1,446 views
Carol and Bruno drag a box of mass 58.0 kg along a frictionless floor. Carol pushes the box with a force of 11.4 N at an angle
1. 1 answer
2. 694 views
A 1600 kg vehicle moves with a velocity of 19.5 m/s. Calculate the power required to reduce the velocity to 3.20 m/s in 11.0 s.I
1. 1 answer
2. 1,005 views
A cable pulls a crate of mass 19.0 kg across the floor in 6.8 s. If the total distance traveled is 5.40 m, find the power used
1. 0 answers
2. 515 views
How much heat must be removed from 0.15 kg of water to cool it from 95 d/C to 25 d/C? The specific heat capasity of water is
1. 0 answers
2. 511 views
A student lifts a 1.2 kg bag from her desk, which is 0.59 m high, to a locker that is 2.9 m high. What is the gravitational
1. 2 answers
2. 3,419 views
A 75 kg skydiver dives out of her airplane 3000 m in the air. How much potential energy will she have left 1/4 of the way down?P
1. 0 answers
2. 467 views
How much work is a 200 kg weightlifter doing while he holds a 1000 kg barbell stationary .75 m over his head?1000(.75) = 7350 J
1. 0 answers
2. 622 views
The melting point of a solid is 90.0 d/C. What is the heat required to change 2.5 kg of this solid at 40.0 d/C to a liquid? The
1. 3 answers
2. 6,011 views
When a closed tin is heated, the pressure inside it increases. This happens because:The molecules move faster and each molecule
1. 1 answer
2. 768 views
Which of the following physical properties can be used to measure temperature using a thermometer?A)volume B)pressure C)density
1. 2 answers
2. 936 views
True/FalseThe thermal energy of the particles in a gas is related to the temperatureof the gas. answer:true
1. 0 answers
2. 519 views
True/FalseA hot object has more thermal energy than a similar cold object only because of greater kinetic energy. answer:true
1. 1 answer
2. 867 views

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