Answer: 0.5 kg
Explanation:
Force of launched skyrocket = 10 N
Acceleration of skyrocket = 20 m/s squared (i.e 20m/s^2)
Mass of the skyrocket = ?
Recall that Force is the product of the mass of an object by the acceleration by which it moves.
i.e Force = Mass x Acceleration
10N = Mass x 20m/s^2
Mass = (10N/20m/s^2)
Mass = 0.5 kg
Thus, the mass of this skyrocket is 0.5 kilograms
Answer:
3.14
Explanation:
A student was comparing two samples with an equal number of carbon atoms. One sample contained only Carbon-12 atoms. One sample contained only Carbon-14 atoms, which contain two more neutrons than Carbon-12 atoms. The student measured the mass of each sample and testing the reactivity of each sample.
Required:
What would best describe the results of the investigation?
Carbonates
OPTION A is the correct answer
Answer:
Color change
Explanation:
If it is a chemical change, then the color will change. Sometimes chemical changes also cause fizzing and bubbling.
Answer:
11.32cm
Explanation:
This question describes a cylinder rod formed from silicon with length 21.3cm and mass 5kg. The density of the silicon is 2.33g/cm3.
To calculate the diameter, the radius is needed. To calculate the radius, the volume is needed. To calculate the volume, the formula: density = mass (m) / volume (V) is used.
Mass = 5kg, which is 5 kg × 1000g = 5000g
Density= 2.33g/cm3
Hence; volume= mass / density
= 5000/2.33
= 2145.9 cm3
Volume of cylinder= πr^2h
Where h= 21.3cm and π= 3.142
That is; r^2 = volume/πh
= r^2 = 2145.9/3.142×21.3
= r^2 = 2145.9/66.9246
= r^2 = 32.06
r= √32.06
r= 5.66cm
If radius of the cylinder is 5.66cm, the diameter is twice of the radius.
That is, diameter (d) = 5.66 × 2
= 11.32 cm
Therefore, the diameter of the cylinder is 11.32cm.
