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Mandy Ybarra

Mandy Y.

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Viewed Questions

If $\vec{A}$ and $\vec{B}$ are two vectors, which of the following is not correct? (a) $\vec{A}+\vec{B}=\vec{B}+\vec{A} \quad A \uparrow \uparrow A$ (d) $\vec{A}-\vec{B}=-(\vec{B}-\vec{A})$

If $\vec{A}$ and $\vec{B}$ are two vectors, which of the following is not correct? (a) $\vec{A}+\vec{B}=\vec{B}+\vec{A} \quad A \uparrow \uparrow A$ (d) $\vec{A}-\vec{B}=-(\vec{B}-\vec{A})$

Objective NCERT at your FINGERTIPS: Physics

Calculate the equilibrium constant, $K$, at $298 \mathrm{~K}$ for the reaction $$ \mathrm{H}_{2} \mathrm{O}(\mathrm{D}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) $$ The standard Gibbs energy change of formation of $\mathrm{H}_{2} \mathrm{O}(\mathrm{l})$ at $298 \mathrm{~K}$ is - $237.1 \mathrm{~kJ} \mathrm{~mol}^{-1}$. (Section 15.3)

Calculate the equilibrium constant, $K$, at $298 \mathrm{~K}$ for the reaction $$ \mathrm{H}_{2} \mathrm{O}(\mathrm{D}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) $$ The standard Gibbs energy change of formation of $\mathrm{H}_{2} \mathrm{O}(\mathrm{l})$ at $298 \mathrm{~K}$ is - $237.1 \mathrm{~kJ} \mathrm{~mol}^{-1}$. (Section 15.3)

Chemistry3: Introducing Inorganic, Organic and Physical Chemistry

Questions asked

ANSWERED

Dominique Jan Tan verified

Numerade educator

If 93.40 J of energy is input in the system out of which 38.26 J of energy is used to change the internal energy, then the work done by the system is (Answer needs to be in Joule and with 2 decimal places)

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ANSWERED

Dominique Jan Tan verified

Numerade educator

How much heat do you have to add to 795 g of water to raise its temperature 12° C? The specific heat of water is 4.186 J/g°C.

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ANSWERED

Dominique Jan Tan verified

Numerade educator

A 1.5 kg mass compresses a spring with a spring constant of 1200 N/ m by a distance of 0.95 m. The spring releases and launches the mass on to a friction floor. On the floor is a 5 m long mat with a coefficient of kinetic friction 0.5. What is the final velocity of the mass after it passes the friction mat? A. 51.6 m/s B 32.5 m/s C. 90.8 m/s D. 26.1 m/s E. 17.7 m/s

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ANSWERED

Dominique Jan Tan verified

Numerade educator

How many grams of oats at temperature 27° C should you add to 123 g of water at 85° C in order for the mixture to have a thermal equilibrium temperature of 68°C? The specific heat of water is 4.186 JK/g°C and the specific heat of oats is 1.277 J/g°C A. 229 g B. 192 g C. 167 g D. 110 g E. 135 g

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ANSWERED

Dominique Jan Tan verified

Numerade educator

Calculate the pressure on a goldfish that is 200 m below water. The density of water is 1030 kg/m^3 A. 5.55*10^6 Pa B. 1.2*10^6 Pa C. 3.27*10^6 Pa D. 3.78*10^6 Pa E. 2.02*10^6 Pa

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ANSWERED

Nishant Kumar verified

Numerade educator

A body having a rotational inertia of 0.17 kg m^2 and rotating with a velocity of 3.67 rad/s has a rotational kinetic energy of ____ J (answer needs to be with 2 decimal places and in units of joule)

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ANSWERED

Dominique Jan Tan verified

Numerade educator

F F1 0 t1 t2 t

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ANSWERED

Lucas Finney verified

Numerade educator

A 0.800 kg rubber ball is thrown downward at a speed of 0.96 m/s. After it hits the ground, it moves upward at a speed of 0.96 m/s. Calculate the change in momentum of the rubber ball. (answer in 4 decimal places)

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ANSWERED

James Kiss verified

Numerade educator

A force Vector has components 34 meters per second Westward and 25 meters per second northward the magnitude of vectors is ( A.7.68 B. 4.22 C. 42.20 D. 76.8) M/s (A. West B. Southwest C. South D. north E. Southwest F. East G. Northeast)

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ANSWERED

Penny Riley verified

Numerade educator

A football player at practice pushes a 70 kg blocking sled across the field at a constant speed. The coefficient of kinetic friction between the grass and the sled is 0.30. A. 1400 N B. 210 N C. 760 N D. 140 N E. 42 N

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