a car requires 1x10^8J of energy to drive 30km. calculate how many kilometers you could hypothetically drive using the energy contained in the rest mass of 100mg of fuel.

Answers

Answer 1

Answer: Ah hah ! I spy a question about E = m c² .
OK, here we go. Fossen your seat belt, mon,
it's going to be eh boompy rade !

E = energy equivalent of mass
m = the mass of the mass
c = the speed of light

E = (m) (c)²

      = (100 mg) (3 x 10⁸ m/s)²

   = (1 x 10⁻⁴ kg) (9 x 10¹⁶ m²/s²)

   = 9 x 10¹² (kg-m²/s²)

   = 9 x 10¹² (kg-m/s²) (m)

   = 9 x 10¹² (newton) (m)

   = 9 x 10¹² joules .

The car can go 30 km on 10⁸ J of energy.

How far can it go on 9 x 10¹² J ?

(9 x 10¹² J) x (30 km / 10⁸J)

   = (9 x 10⁴) x (30 km) = 2,700,000 km

   = roughly 7.3 times the distance to the moon.

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If a radio and a bulb each of resistance 3 ohm are connected in series to a 12 volts battery, the potential difference across each will be;a) 3V

b) 6V

c) 12V

d) 9V

Can u please solve and then explain answer

Answers

Answer:

$\rm{Option \:B) \: 6V}$

Explanation:

Given resistance of the radio is 3Ω and the resistance of the bulb is 3Ω. The total resistance in the circuit is

$R_1 + R_2 = 6 Ω</p><p>$

NowapplyOhm'sLaw,

$V \:=\: IR$

The voltage of the battery is V = 12V. And we have the total resistance of the circuit. Substituting the values to find current:

$I = 12 V / 6 Ω = 2A$

The potential difference across the radio or the bulb (using V = IR) is:

$V = 3 * 2 = 6V$

~The answer is option(b) 6 volts.

A net force of 40 N south acts as an object with a mass of 20kg. What is the object's acceleration

Answers

Answer:

a = 2 m/s²

Explanation:

Given: 20 g, 40N

To find: Acceleration (a)

Solution: To find the acceleration (A), divide the force by the weight

A = F ÷ m

= 40 ÷ 20

= 2 m/s²

Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.

In stars mor massive than the sun, fusion continues until the core is almost all....

Answers

In stars more massive than the sun, the core temperature is hotter, which allows for fusion of more complex elements.

Most of the fusion occurs in the core.

In stars more massive than the sun, fusion continues through Deuterium, Carbon, and finally reaching iron/nickel.

Up to this point, the fusion reaction was endothermic, which means that the energy expended to produce the fusion reaction was exceeded by the energy produced in the reaction.

Fusion past iron is exothermic, and therefore the star will be able to survive by fusing elements heavier than iron.

After the core is almost entirely iron, the star is no longer in the Main Sequence.

So, fusion in stars more massive than the sun continue fusing until the core is almost entirely iron.

How does friction slow things down?

Answers

Friction slows things down because the force that is created through the interaction between two objects begins to decrease the acceleration and velocity of the object. Therefore, the object begins to slow down.

friction slows things down because the tiny rough bumps on all surfaces hook on each other and slow down the object and produce heat

Look at the Bohr model of the Helium atom. What part of the atom is represented by the letter Y? Question 12 options: A. nucleus B. neutron C. orbital D. electron E. proton

Answers

Answer : The correct option is, (B) neutron

Explanation :

As we know that the atomic number of helium atom is 2. That means it has 2 number protons, 2 number of electrons and 2 number of neutrons.

There are three subatomic particles. Protons, neutrons and electrons. The subatomic particle proton which is positively charged and neutron which is neutral are located in the center of the nucleus and the subatomic particle electrons which is negatively charged are located outside the nucleus.

In Bhor atomic of the helium atom,

The letter X represent the electrons.

The letter Y represent the neutrons.

The letter Z represent the protons.

The letter W represent the nucleus.

Hence, the correct option is, (B) neutrons.

The Answer that your looking for is NEUTRON

hope this helps you :)

An electron is pushed into an electric field from infinity where it acquires a 1-V electrical potential. Suppose instead that two electrons are pushed from infinity the same distance into the same electric field. The electrical potential of the two electrons is ___________.a) 0.5V
b) 1V
c) 0.25V
d) 4V
e) 2V