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3 years ago

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has ___ energy

Physics

1 answer:

TiliK225 [7]3 years ago

4 0

Answer:

KE = 1/2mv^2

KE = 1/2(1120)(40^2)

KE = 560(1600)

KE = 896000

Let me know if this helps!

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An object is moving at a velocity of 23 m/s. It accelerates to a velocity of 85 m/s over a time of 8.3 s. What acceleration did

Bess [88]

$\frac{v \: final \: - v \: initial }{time} = \: a$
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3 years ago

Read 2 more answers

A 1 mW laser beam is incident onto a detector. Determine the fractional fluctuation in number of photons intercepted by the dete

Ugo [173]

Answer:

(a) $625 photons$

(b) $625\times 10^{6}photons$

Explanation:

Given that , the power of the laser beam is,

$P=1 mW\\P=1\times 10^{-3} W$

and time is given is,

$t=1\mu s\\t=10^{-6}s$

Now the energy formula for the laser beam is,

$E=P\times t$

Now,

$E=10^{-3}\times 10^{-6} \\E=10^{-9}J$

(a) The value of energy is given,

$E_{1}=10MeV\\E_{1}=10\times 10^{6}\times 1.6\times 10^{-19}J\\ E_{1}=16\times 10^{-13}J$

Now the no of photons's fraction fluctuation is,

$n=\frac{E}{E_{1} }\\ n=\frac{10^{-9} }{16\times 10^{-13} }\\ E_{1}=625 photons$

Therefore the no of photons is $625 photons$ .

(b)The value of energy is given,

$E_{z}=10eV\\E_{z}=16\times 10^{-19}J$

Now the no of photons's fraction fluctuation is,

$n=\frac{E}{E_{z} }\\ n=\frac{10^{-9} }{16\times 10^{-19} }\\n=625\times 10^{6}photons$

Therefore the no of photons is $625\times 10^{6}photons$ .

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3 years ago

What type of nuclear decay occurs when the original nucleus loses two protons and two neutrons?

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THe loss of 2 protons and 2 neutrons (also called a helium nucleus) is defined as alpha decay.

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3 years ago

A simple, direct-current electrical circuit is shown below.

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The direction of current flow is given by an arrow in the electrical circuit.

Several categories are used to categorise electrical circuits. One-way current only flows through a direct-current circuit. As with most residential circuits, an alternating-current circuit is a channel for transmitting electrical current that pulses back and forth numerous times each second.

A battery or generator, a device that provides energy to the charged particles that make up the current, a device that uses current, such as a lamp, an electric motor, or a computer, and the connecting wires or transmission lines make up an electrical circuit.

A source of electrical power, two wires that can transmit current, and a light bulb make up an electrical circuit. Both wires have one end connected to a cell terminal and the other end connected to a light bulb. When the light bulb is turned off, the electrical circuit is disrupted.

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2 years ago

Which statement BEST explains the relationship between mass and weight.A.mass increases, weight is decreases.B.mass increases, w

Dmitry_Shevchenko [17]

Weight is caused by the influence of gravity on matter/mass. Weight is given by the formulae;

Weight = Mass * Gravitational acceleration

On earth, the gravitation acceleration is a constant 10m/s2

Therefore the weight will be influenced by mass of the object in a direct relationship.

An increase in mass will cause a proportionate increase in weight.

Explanation:

Gravity is not constant across the universe with larger celestial bodies have a greater gravitational pull. Therefore an object with the same mass on earth may weigh differently on another celestial body with different gravitational acceleration. An example is the Moon. Due to the fact that the Moon has approximately ¹/3 of earth’s gravitational force, astronauts weight ¹/3 times less on the moon than on earth.

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