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2 years ago

URGENT I WILL GIVE BRAINLIEST

Physics

1 answer:

Reil [10]2 years ago

4 0

Weight : It is the gravitational attraction force on an object near its surface.

It is always measured in the unit of Newton(N)

it is given by the product of mass and acceleration due to gravity

$W = mg$

here we know that mass of the pig is m = 140 kg

also we know that acceleration due to gravity near the surface of earth is approximately g = 9.8 m/s/s

so here we know by above formula

$W = (140 kg)(9.8 m/s^2)$

$W = 1372 N$

so correct answer will be

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Time running out plzz hurry!!!!!!

Vesnalui [34]

I think you would hear a lower pitch

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2 years ago

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Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54×107 light-years from Earth. If the lifetime of a human i

Varvara68 [4.7K]

Answer:

$0.0018833\ \text{m/s}$

Explanation:

$d$ = Distance of Andromeda Galaxy from Earth = $2.54\times 10^7\ \text{ly}$

$t$ = Time taken = $90\ \text{years}$

$c$ = Speed of light = $3\times 10^8\ \text{m/s}$

We have the relation

$t=t_o\sqrt{1-\dfrac{v^2}{c^2}}\\\Rightarrow 90=2.54\times 10^7\sqrt{1-\dfrac{v^2}{c^2}}\\\Rightarrow \dfrac{90^2}{(2.54\times 10^7)^2}=1-\dfrac{v^2}{c^2}\\\Rightarrow 1-\dfrac{90^2}{(2.54\times 10^7)^2}=\dfrac{v^2}{c^2}\\\Rightarrow v=c\sqrt{1-\dfrac{90^2}{(2.54\times 10^7)^2}}$

$c-v=c(1-\sqrt{1-\dfrac{90^2}{(2.54\times 10^7)^2}})\\\Rightarrow c-v=3\times 10^8(1-\sqrt{1-\dfrac{90^2}{(2.54\times 10^7)^2}})\\\Rightarrow c-v=0.0018833\ \text{m/s}$

The required answer is $0.0018833\ \text{m/s}$ .

7 0

2 years ago

In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates.

RSB [31]

Answer:

T = 125.30C

Explanation:

Using Stefan-Boltzmann law

P/A = e* Stefan-Boltzmann constant * T^4

Where p= radiant power in watts

e = emissivity

T = Temperature in kelvin

A= Surface area of the object measured in m^2

Considering that after painting the object have the radiant power then

0.83* A* Stefan-Boltzmann constant *(337.1^4) = 0.46 * A* Stefan-Boltzmann constant * Tnew^4

Cancelling the common terms yields

0.83*(337.1^4) = 0.426*Tnew^4

Fourthroot(0.83*(337.1^4)) = Tnew

Tnew = 398.3k = in degree Celsius 125.3

8 0

2 years ago

We sing better in the shower due to standing waves. Assume that your shower is 2.45 m (about 8 ft) tall and can be modeled as an

Ivahew [28]

Answer:

λ = 4.9 m

Explanation:

given,

length of the organ pipe,L = 2.45 m

wavelength of the standing wave = ?

fundamental harmonic is given as,

$L= \dfrac{\lambda}{2}$

$\lambda= 2 \times L$

$\lambda= 2 \times 2.45$

λ = 4.9 m

Hence, the wavelength of the fundamental harmonic for standing waves in this shower is given by λ = 4.9 m

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3 years ago

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What is the engine power of a car with 500N moving at constant speed 20ms-1

tatiyna

Answer:

7.4

Explanation:

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2 years ago