It's vertical position in the air at time is
where is the acceleration due to gravity. After 1.00 second has passed, its position is
Answer:
3.45×10⁻⁴mm (or 0.000345mm)
Explanation:
Use a method called dimensional analysis here. It involves a chain of conversions, so we'll need some conversions to work with.
- 1nm = 1×10⁻⁹m
- 1mm = 1×10⁻³m
- 345nm; which is given
If you knew the conversion from nanometers to millimeters then you could just do it in one step. But I don't, so I won't. Anyways, you put the conversions into fraction form like so:
And then orient them in a way where multiplying the two (or more in other instances) gives you the units you want. In this cas it's millimeters so you'll have:
(345nm)•(1×10⁻⁹m/1nm)•(1mm/1×10⁻³m)
Notice how all the units reduce except for mm. From here you just multiply across and should get 345×10⁻⁶mm which simplifies to 3.45×10⁻⁴mm.
Answer: 49.4g
Explanation:
Weight = 484N
Mass = ?
Recall that the weight of an object is a product of its mass (m) by gravitational acceleration (g). And g is a constant with value of 9.8 ms2
Thus, Weight = mg
484N = mass x 9.8 ms2
Mass = (484/9.8)
Mass = 49.388g
(Rounded to the nearest tenth, the mass becomes 49.4g)
Thus, your father is 49.4grams in mass
Use this equation acceleration= final velocity-Initial velocity/ time taken
a=v-u/t
Hope this help