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Physics questions set 2

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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

#589086 — Physics questions set 2

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)





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






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

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#589282

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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