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  • A buoy is floating in water and is tied to a post.?

    Your answer: 
    The water is creating a force of 3 N on a bearing of 125° and the wind is creating a force of 2 N on a bearing of 230°. What force does the post need to exert on the buoy to keep it in equilibrium?
    2 hours ago
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  • Physics - Fields MC #18?

    Your answer: 
    The electric potential due to a unit charge q at a distance r is V. What is the potential due to a charge of 4q at a distance of 2r? a. 2V b. V c.1/2V d.1/4V
    2 hours ago
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  • Physics - Fields MC #16?

    Your answer: 
    What is an advantage of RFID tags over bar codes? a. They can be embedded in any non-metallic item. b. They can be read inside a container. c. Hundreds can be read simultaneously. d. All of these.
    2 hours ago
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  • Physics - Fields MC #14?

    Your answer: 
    The magnetic forces between current-carrying wires were first measured by which scientist? a. Ampère b. Volta c. Coulomb d. Newton
    2 hours ago
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  • Physics - Fields MC #13?

    Your answer: 
    Which statement is true about electromagnetic fields? a. These fields are produced by household appliances and electronic equipment. b. There is clear evidence that exposure to these fields causes cancer in adults. c. Childhood leukemia is definitely linked to exposure to these fields. d. All of these.
    2 hours ago
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  • Physics - Fields MC #11?

    Your answer: 
    What is the principle of a mass spectrometer? a. a magnetic field is used to deflect electrically charged particles b. an electric field is used to deflect electrically charged particles c. a magnetic field is used to deflect particles with mass d. an electric field is used to deflect particles with mass
    2 hours ago
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  • Physics - Fields MC #10?

    Your answer: 
    A muon is a subatomic particle with the same charge as an electron, but a different mass. A muon and an electron are both shot into the same magnetic field at the same speed. The electron moves in a circle of radius 0.025 m. The muon moves in a circle of radius 5.00 m. How does the mass of the muon compare to the mass of the electron? a. about 0.005... show more
    2 hours ago
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  • Physics - Fields MC #9?

    Your answer: 
    A segment of wire in a magnetic field carries a current and feels a magnetic force F. The strength of the field and the current are both doubled. What does the magnetic force become? a.1/4F b.1/2F c.2F d.4F
    2 hours ago
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  • Physics - Fields MC #8?

    Your answer: 
    What are the components of a magnetorheological fluid? a. iron particles suspended in a low-viscosity oil b. latex spheres suspended in a low-viscosity oil c. iron particles suspended in a high-viscosity oil d. latex spheres suspended in a high-viscosity oil
    2 hours ago
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  • Physics - Fields MC #7?

    Your answer: 
    Under what circumstances will a charged particle travelling through a magnetic field follow a spiral path? a. The velocity must have a component both perpendicular and parallel to the field. b. The velocity is parallel to the field. c. The velocity is perpendicular to the field. d. The mass to charge ratio is 1.
    2 hours ago
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  • Physics - Fields MC #6?

    Your answer: 
    A proton with a charge e feels a magnetic force F when moving through a magnetic field. If the speed of the proton is doubled, what is the new magnetic force on the proton? a. 4F b. 3F c. 2F d. F
    2 hours ago
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  • Physics - Fields MC #5?

    Your answer: 
    A current of 5.00 A flows through a wire 10.0 cm long. The wire is in a magnetic field of strength 2.00 T, perpendicular to the wire. What is the magnitude of the magnetic force acting on the wire? a. 0 N b. 0.500 N c. 1.00 N d. 2.00 N
    2 hours ago
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  • Physics - Fields MC #4?

    Your answer: 
    A segment of wire runs from north to south in a magnetic field that runs from west to east. The wire carries a current northward and feels a magnetic force F. The direction of the field is changed to [E 30.0° N]. What is the magnitude of the new magnetic force on the wire? a. F b. 0.866F c. 0.500F d. 0F
    2 hours ago
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  • Physics - Fields MC #3?

    Your answer: 
    Under what circumstances will the magnetic force acting on a proton in a magnetic field equal zero? a. The field is parallel to the motion of the proton. b. The proton is at rest with respect to the field. c. The angle between the field lines and the motion of the proton is 180 degrees. d. All of these.
    2 hours ago
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  • Physics - Fields MC #2?

    Your answer: 
    Which statement applies to magnetic resonance imaging (MRI)? a. MRI relies on interactions with water protons in the human body. b. MRI uses electric fields to cause transitions in hydrogen atoms. c. MRI makes use of microwave frequency radiation. d. All of these.
    2 hours ago
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  • Physics - Fields MC #1?

    Your answer: 
    A uniform electric field has a strength of 150 N/C. A charge of 1.20 C is placed in the field. How much work does the field do on the charge in moving it 0.500 m? a. The charge does work on the field. b. 90 J c. 180 J d. 75 J
    2 hours ago
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  • Given v = [3, -6, 2] and w= [-1, 6, 5], find;?

    Your answer: 
    a. v ↓ w b. w ↓ v c. What does the magnitude of w ↓ v depend on? d. What does the direction of w ↓ v depend on?
    3 hours ago
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  • Add your answer
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  • Frictional force question?

    Your answer: 
    A block of weight 200N rests on a rough horizontal table. When the block just begin to slip, the pulling force is found to be 40N. What is the coefficient of friction between the two surfaces? A. 50.0 B. 5.0 C. 0.5 D. 0.05 E. 0.005
    7 hours ago
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