For calculating work, the force and the distance must be in the same units direction magnitude 2. the lawnmower handle is at an angle to make it to push. easier harder 3. what units for time must be used in calculating power? days hours seconds

1.) Direction

2.) Easier

3.) Seconds

Explanation:

1.) Work is defined as the scalar product of force and distance. The force is applied in the same direction as that of distance.

Mathematically,

2.) From the above expression, the angle plays an important role in the calculation of work.

When , then and work done will be maximum in that case.

But, when the angle increases, the magnitude of work decreases and it becomes easier to push.

When , then and work done will be 0 which is minimum.

3.) Expression for power is given as:

Units of time which must be used in calculating power is seconds.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.