# Basic Physics of Mass, Heat, Balance Equations, Waves and pH

1. If an object has a mass of 1.0 Kg, what is it's weight on Jupiter with 2.5 times the gravitational force as on earth?

2. What net force is necessary to accelerate a 1000-Kg space probe 8m/s2?

3. How much heat that must be added to raise the temperature of a cup of coffee (250g) from 25.5ÂºC to 95.6ÂºC. Assume that the coffee has a specific heat of 4.187 ?

4. Which of the following reactions is not correctly balanced?

a. 4Fe + 3O2 â†’ 2Fe2O3

b. C3H8 + 10O2 â†’ 3CO2 + 4H2O

c. N2 + 3H2 â†’ 2NH3

d. 2H2O â†’ 2H2 + O2

5. How long would it take for a radio wave to travel 8.00 x 1010 m?

6. A pH 2 solution has _____ times the concentration of hydroxide as a pH 6 solution.

Â© BrainMass Inc. brainmass.com December 24, 2021, 11:25 pm ad1c9bdddfhttps://brainmass.com/physics/computational-physics/basic-physics-mass-heat-balance-equations-waves-ph-567347

## SOLUTION This solution is **FREE** courtesy of BrainMass!

1. If an object has a mass of 1.0 Kg, what is its weight on Jupiter with 2.5 times the gravitational force as on earth?

Solution:

2. What net force is necessary to accelerate a 1000-Kg space probe 8m/s2?

Solution:

3. How much heat must be added to raise the temperature of a cup of coffee (250g) from 25.5ÂºC to 95.6ÂºC. Assume that the coffee has a specific heat of 4.187?

Solution:

4. Which of the following reactions is not correctly balanced?

a. 4Fe + 3O2 â†’ 2Fe2O3

b. C3H8 + 10O2 â†’ 3CO2 + 4H2O

c. N2 + 3H2 â†’ 2NH3

d. 2H2O â†’ 2H2 + O2

Solution:

b. C3H8 + 10O2 â†’ 3CO2 + 4H2O

The above equation is not balanced.

The balanced equation would be:

C3H8 + 5O2 â†’ 3CO2 + 4H2O

5. How long would it take for a radio wave to travel 8.00 x 1010 m?

Solution:

Radio waves travel with the speed of light.

6. A pH 2 solution has _____ times the concentration of hydroxide as a pH 6 solution.

Solution:

Solution:

A pH 2 solution has 10000 times the concentration of hydroxide as a pH 6 solution.

https://brainmass.com/physics/computational-physics/basic-physics-mass-heat-balance-equations-waves-ph-567347