Answer: ![5.935(10)^{13}g/cm^{3}}](https://tex.z-dn.net/?f=5.935%2810%29%5E%7B13%7Dg%2Fcm%5E%7B3%7D%7D)
Explanation:
Density is a characteristic property bodies and materials, and is defined as the relationship between the mass
and the volume
, as shown below:
(1)
In the case of the neutron star, we know it has the same mass as the Sun:
![m=1.989(10)^{30}kg](https://tex.z-dn.net/?f=m%3D1.989%2810%29%5E%7B30%7Dkg)
And its radius is ![r=20km](https://tex.z-dn.net/?f=r%3D20km)
On the other hand, if we assume this neutron star has a spherical shape, its volume can be calculated by the following formula:
(2)
(3)
(4)
Substituting (4) in (1):
(5)
Finally:
It's called gliding.
So, they will get up high and collect their balance and be nice and steady. Then, they can spread their wings out and glide. The wind will carry them from their.
How do we manage to stand without constantly walking? It's the same exact thing.
Answer:
speed is defined as distance travelled per unit time
Answer:
180 turns
Explanation:
Transformer: A transformer is an electrical device that operates based on the principle of electromagnetic induction.
Using
Ns/Np = Vs/Vp.............................. Equation 1
Where Ns = Number of turns in the secondary coil, Np = Number of turns in the primary coil, Vs = Voltage in the secondary coil, Vp = Voltage in the primary coil
Make Np the subject of the equation
Np = Ns(Vp/Vs)................... Equation 2
Given: Ns = 45 turns, Vp = 120 V, Vs = 30 V
Substitute into equation 2
Np = 45(120/30)
Np = 180 turns.
C: 6.0000
-To find significant figures, you always start by counting the FIRST NON-ZERO DIGIT in the number.
-Non-Zero digits are ALWAYS significant figures
A is a whole number, and has no decimal points, so you would count the first and last non-zero digits (5 and 2). If there were any zeros in between these numbers (eg. 302) we would also count them, but since all the zeros are BEHIND the last non zero digit (2) we DON'T count them. This leaves only two significant figures.
B, C, and D are all decimals, so the rules for counting are slightly different. Again, you start by counting the FIRST non zero digit, even if it is after the decimal (like in D) and you finish counting at the LAST digit in the number, even if it is a zero.
B, we would count 8, 0, 0, 2. This is only 4 significant figures.
D, we would count 2, 3, 5, 0. It doesn't matter that the 2 is behind the decimal, since all non-zero numbers are significant figures. The 0 at the end also counts because it is the last digit in the number. This is still only 4 significant figures.
This leaves only C!
C, we would count 6, 0, 0, 0, 0.
6 is the first non-zero digit, and since it is a decimal we go all the way to the last digit, aka 0. This counts 5 significant figures.