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Re: Physics questions set 2

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On 7/13/2016 1:34 PM, Sergio wrote:
>
>
> An object with mass m and speed v_0 directed to the right strikes a wall
> and rebounds with speed v_0 directed to the left.
>
> The change in the object's kinetic energy is
>
>     (A) negative m times ((v_0)^2)
>     (B) negative (1 over 2) times m times ((v_0)^2)
>     (C) Zero
>     (D) (1 over 2) times m times ((v_0)^2)
>     (E) m times ((v_0)^2)
>
>

C,  direction change with zero loss bounce, patent that material!


>
>
>
> A teacher measures and records her own mass to an accuracy of better
> than half a percent. Which of the following is most likely the mass that
> she recorded?
>
>     (A) 6.43 k g
>     (B) 60 k g
>     (C) 64.3 k g
>     (D) 600 k g
>     (E) 643 k g
>
>
>

C obviously,  D has to be towed to school by a barge.


>
>
>
> An experiment is performed to measure the specific heat of copper. A
> lump of copper is heated in an oven, then dropped into a beaker of
> water. To calculate the specific heat of copper, the experimenter must
> know or measure the value of all of the quantities below EXCEPT the
>
>     (A) mass of the water
>     (B) original temperatures of the copper and the water
>     (C) final (equilibrium) temperature of the copper and the water
>     (D) time taken to achieve equilibrium after the copper is dropped
> into the water
>     (E) specific heat of the water
>
>

D   obviously

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Physics questions set 2 Sergio <invalid@invalid.com> - 2016-07-13 13:34 -0500
  Re: Physics questions set 2 gia meeks <invalid@invalid.com> - 2016-07-14 13:59 -0500

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