The following lists of stars in order from least density to greatest density are giant, main sequence star, white dwarf, neutron star. The answer is letter B. Aside from neutron star being the densest star, it is also the smallest star compared to the giant star, as its name implied.

6 0

3 years ago

Un ladrón viaja en un auto a una velocidad excesiva de 30m/s, en dicho momento un policía de tránsito, lo observa y monta en su

tester [92]

Answer:

t = 12 s

Explanation:

To find the time in which the police reaches the thief you write the equation of motion of both thief and police:

The thief has a constant velocity, the position is then given by:

$x=vt$ (1)

The police has an acceleration, then the position is:

$x=v_ot+\frac{1}{2}at^2$ (2)

the time in which the police reaches the thief is when their positions are equal, that is, when expression (1) equals expression (2). But before you calculate the acceleration of the police:

$a=\frac{v-v_o}{t}\\\\v_o=0m/s\\\\a=\frac{50m/s}{10s}=5\frac{m}{s^2}$

you replace this values in (2) and you equal the expression (1) and (2) (with vo = 0):

$vt=\frac{1}{2}at^2\\\\\frac{1}{2}at^2-vt=0\\\\(\frac{1}{2}at-v)t=0$

one root is t = 0s, but it is omitted because is the momment in which the thief pass in front of the police. The other root is:

$\frac{1}{2}at-v=0\\\\t=\frac{2v}{a}=\frac{(2)(30m/s)}{5m/s^2}=12s$

hence, the time is 12 s

8 0

4 years ago

The law of conservation of energy states:

Alborosie

Answer:

In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. ... For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.

6 0

3 years ago