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3 years ago

What is Archimedes' Principle?

1 answer:

6 0

Archimedes' Principle is a law of physics related to the the ability of an object to float. This is a physical law related to the ability of an object to float that states that any object fully or partially submerged in water and at rest is acted upon in an upward direction, by a force whose magnitude is equal to the weight of the object. Since this force works in the opposite direction, the body/object neither sinks nor rises. If the sunk object displaces as much water as its weight, it does not sink but floats. The best example to explain this law is the ship in the ocean. When the ship enters the ocean, it begins to sink until it has displaced the same amount of ayer which is equal to its own weight, after which it starts to float.

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A car drives off a cliff next to a river at a speed of 30 m/s and lands on the bank on theother side. The road above the cliff i

dezoksy [38]

Answer:1.301 s

Explanation:

Given

Initial Velocity(u)=30 m/s

Height of cliff=8.3 m

Time taken to cover 8.3 m

$h=ut+\frac{at^2}{2}$

here Initial vertical velocity is 0

$8.3=\frac{gt^2}{2}$

$t^2=1.69$

$t=1.301 s$

Horizontal distance

$R=u\times t$

$R=30\times 1.301=39.04 m$

7 0

3 years ago

Heat energy is produced when molecules move. True False

Dennis_Churaev [7]

Answer:

true

Explanation:

7 0

3 years ago

All objects____ energy. Eliminate Conduct Radiate Insulate

Trava [24]

the answer is c. radiate

7 0

3 years ago

Please left home at 8 AM to spend the day at in amusement park. He arrived at the park, which was 150 KM from his house, at 10 A

antiseptic1488 [7]

Answer:

$v=\frac{150km}{2h}=75\frac{km}{h}$

Explanation:

We can use the equation for the speed

$v=\frac{x}{t}$

where x is the distance and t the time. In this case we know that the time spent was 2 hours and the distance was 150km. By replacing we have

$v=\frac{150km}{2h}=75\frac{km}{h}$

I hope this useful for you

regards

3 0

2 years ago

A proton and an electron are both accelerated to the same final speed. If λp s the de Broglie wavelength of the proton and e is

meriva

Answer:

Explanation:

The relation between the de Broglie wavelength and the momentum of the particle is given by

$\lambda =\frac{h}{m\times v}$

where, m is the mas of the particle and v be the velocity of the particle and h be the Plank's constant.

So, the de broglie wavelength of proton is given by

$\lambda _{p}=\frac{h}{m_{p}\times v}$ .... (1)

The de broglie wavelength of electron is given by

$\lambda _{e}=\frac{h}{m_{e}\times v}$ .... (2)

Divide equation (2) by equation (1), we get

$\frac{\lambda _{e}}{\lambda _{p}}=\frac{m_{p}}{m_{e}}$

As the mass of proton is much more than the mass of electron, so the de broglie wavelength of electron is more than the de Broglie wavelength of proton.

5 0

3 years ago