What is the momentum
of an 800-kg car
| traveling at a velocity
of 10 m/s? what is its
momentum if it speeds
up to 50 m/s?

P = 8000 Kg m/s

When speed is increased to 50 m/s,

P = 40,000 kg. m/s

Explanation:

Given data:

Mass = 800 Kg

Velocity = 10 m/s

Momentum = ?

Speed increased = 50 m/s

Momentum = ?

Solution:

Formula:

P = mv

P = 800 kg× 10 m/s

P = 8000 Kg m/s

When speed is increased to 50 m/s.

P = mv

P = 800 kg× 50 m/s

P = 40,000 kg. m/s

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol