• Physics relevance to Electrical Engineering?

    Your answer: 
    Currently a sophomore in Electrical and Computer Engineering. I'm doing physics at the moment and I'm god awful at it. This sparked my anger and now out of curiosity I'm wondering how this is even important? I don't think I need to calculate the point charges in anything I ever do in engineering, nor do I need to know how the... show more
    1 hour ago
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  • Physics question?

    Your answer: 
    Professional ping-pong players can hit a ball at speeds approaching 70 mph. A ping pong table is 2.74m long by 1.525mand wide. If a player hits a ball at this speed along with the diagonal of the table, how long will it take? Acceleration due to air his assistance at this speed is extreme, about +/-50 m/s2
    2 hours ago
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  • Does EMP create a magnetic field?

    Your answer: 
    If a person receives a lot of beams will her attrack metal, plastic etc? 2- If a person shot(electromagnetic beams) from the apartment above why doesn't the iron block the beams? 3-Can you block the electromagnetic beams with a metal panel? 4-Are the voices to brain EMP too? 5-How bad is to receive electromagnetic beams? 6-How long go the... show more
    17 hours ago
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  • Vector A has a magnitude of 6.0..? Please show me where I went wrong!?

    Your answer: 
    Vector A has a magnitude of 6.0m and points 30 degrees north of east. Vector B has a magnitude of 4.0m and points 30 degrees west of north. The resultant vector R=A+B is given by: The answer is 7.2m at an angle of 26 degrees north of east. My work: A= 30 degrees (+) B= -30... show more
    1 week ago
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  • Calc III torque question?

    Your answer: 
    A torque wrench grips a bolt at the origin of coordinates, with the free end of the torque wrench located at the point (r_0, 0, 0).The force on this end of the torque wrench points in the direction of V = <10, 0, 16>. Note that r = <r0, 0, 0> in this problem. Compute the length of the lever arm L needed to produce a torque with... show more
    1 week ago
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  • How do i solve this physics problem?

    Your answer: 
    When a light beam with a wavelength of 700 nm affects a certain metal surface, the maximum energy of the electrons emitted by photoelectric effect is 0.7 eV. Calculate the metal work function and the threshold frequency to achieve photoelectric effect. Does the photoelectric effect occur for wavelengths above or below the threshold... show more
    1 week ago
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  • I need help with a physics problem: Mirror equation?

    Your answer: 
    With his face 6.0 cm from his empty water bowl, Jerome sees his re ection 14 cm behind the bowl. What is the focal length of the bowl? Is this bowl acting as a converging or a diverging mirror?
    1 week ago
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  • Will it be possible to make a production car that can do the quarter-mile in 9.06 sec?

    Your answer: 
    Looks like the Dodge Demon is the closest to achieve it, at 9.65 sec! The reason I ask that is because that would mean that it was accelerating at an average 1g acceleration for the entire run. So you'd be feeling Earth's gravity on your bottom and on your back at the same time!
    1 week ago
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  • I have a space station creating artificial gravity via linear acceleration. how would you use momentum to find the stations fuel consumption?

    Your answer: 
    Im pretty sure the calculations involve energy, but Im not too sure. You can make up any values that are needed. e.g mass, velocity etc. It just has to show how much fuel is consumed in accelerating the space craft such that I can calculate the cost. Thankyou!
    1 week ago
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  • Is light the result of an absence of mass?

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    1 week ago
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  • Struggling with these physics questions... please help.?

    Your answer: 
    A car traveling 33 mi/h accelerates uniformly for 9.3 s, covering 453 ft in this time. What was its acceleration? Round your answer to the nearest 100th place. Answer in units of ft/s^2. What is the final velocity at this time? Answer in units of ft/s.
    1 week ago
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  • A certain freely falling object, released from rest, requires 1.90 s to travel the last 35.0 m before it hits the ground.?

    Your answer: 
    (a) Find the velocity of the object when it is 35.0 m above the ground. (Indicate the direction with the sign of your answer. Let the positive direction be upward.) m/s (b) Find the total distance the object travels during the fall. m
    1 week ago
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  • A ball is thrown vertically upward with a speed of 26.0 m/s.?

    Your answer: 
    (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its velocity when it returns to the level from which it started? m/s
    1 week ago
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  • Dynamics Question?

    Your answer: 
    An empty lift, which has a mass of 1000 kg, is entered by a person of mass 70 kg. It then descends at it's maximum acceleration of 1.2 m/s^2. a. Calculate: i. the tension on the lift cable ii. the force exerted on the person by the lift floor b.The person's spectacles fall off from a height of 1.7 meters. How long does it take for the... show more
    1 week ago
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