Physics help please! Science Assignment Help. Physics help please! Science Assignment Help.

1. A 35-kg cart (#1) is pulled with a 199-N force for 11 second; another 75 kg cart (#2) is pulled with a 19 N-force for 15 seconds. Which cart (#1 or #2) has the greatest acceleration? Explain.

2.Which cart (#1 or #2) has the greatest impulse? Explain.

3. Which cart (#1 or #2) has the greatest change in momentum? Explain.

Physics help please! Science Assignment Help[supanova_question]

## For bismuth, Bi, the heat of fusion at its normal melting point of 271 °C is 11. Science Assignment Help

For **bismuth**, **Bi**, the heat of fusion at its normal melting point of **271 °**C is **11.0**kJ/mol.

The entropy change when **1.89** moles of solid **Bi** melts at **271 °**C, 1 atm is J/K.

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## A sample of O2 gas is observed to effuse through a pourous barrier in 2.30 minut Science Assignment Help

A sample of **O _{2}** gas is observed to effuse through a pourous barrier in

**2.30**minutes. Under the same conditions, the same number of moles of an unknown gas requires

**3.34**minutes to effuse through the same barrier. The molar mass of the unknown gas is g/mol.

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## The rate of effusion of Ne gas through a porous barrier is observed to be 7.61E- Science Assignment Help

The rate of effusion of **Ne** gas through a porous barrier is observed to be **7.61E-4**mol / h. Under the same conditions, the rate of effusion of **NH _{3}** gas would be mol / h.

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## The average molecular speed in a sample of O2 gas is 443 m/s at 297 K. The avera Science Assignment Help

The average molecular speed in a sample of **O _{2}** gas is

**443**m/s at

**297**K. The average molecular speed in a sample of

**CO**gas is m/s at the same temperature.

_{2}

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## can some one please help me please Science Assignment Help

Which of the following solid substances can be liquefied simply by increasing the pressure suffciently?

can some one please help me please Science Assignment Help[supanova_question]

## probability of something Mathematics Assignment Help

There are 12 people in a race. How many ways can 1^{st}, 2^{nd}, and 3^{rd} be obtained?

When purchasing a sound system you have 6 choices for speakers, another 8 choices for receiver, and 7 choices for a turntable. How many different systems are available for you to construct?

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## can some one please help me please Science Assignment Help

The temperature at point **D**

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## can some one please help me please Science Assignment Help

There is only one known pure substance which, as a liquid, cannot be frozen by cooling alone at 1 atm pressure. Which is it?

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## can some one please help me please Science Assignment Help

For the substance represented by the above phase diagram, at any point at which the solid and liquid are in equilibrium, which phase is ** less dense**?

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