3 years ago

Which choice would reveal a chemical property of water?

Physics

1 answer:

r-ruslan [8.4K]3 years ago

8 0

Answer:

Explanation:

Testing The PH Means Testing The acidity level of the water of which would be a chemical reaction

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4 years ago

A cannon is rigidly attached to a carriage, which can move along horizontal rails but is connected to a post by a large spring,

Mademuasel [1]

Answer:

Explanation:

Given

mass of cannon and cart is $m_1=6475.91 kg$

Spring constant $k=20000 N/m$

mass of Projectile $m_2=234 kg$

Launch Velocity of cannon $v_2=170 m/s$

Launch angle $\theta =31.3^{\circ}$

As the External Force is zero therefore we can conserve momentum

Initially both Projectile and cannon is at rest

Conserving momentum in horizontal direction

$m_1u_1+m_2u_2=m_1v_1+m_2v_2\cos 31.3$

$0+0=6475.91\times v_1+234\times 170\cdot \cos (31.3)$

$v_1=-\frac{234\times 170\cdot \cos (31.3)}{6475.91}$

$v_1=-5.24 m/s$

i.e. cannon is moving in opposite direction of Projectile

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4 years ago

Find the net rate of heat transfer by radiation in watts from a skier standing in the shade, given the following. She is complet

fomenos

Answer:

-34.5 W

Explanation:

rate of heat transfer = Stefan-Boltzmann constant x emissivity x surface area x temperature^4

$P = \alpha eA(T_{f} ^{4}- T_{i} ^{4}) = 5.67*10^{-8} *0.205*1.5(256^{4} - 284.4^{4} ) = -34.5 W$

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3 years ago

What is an electrical charge ?

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An Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.

I hope this helped you with your problem.

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A ball is thrown horizontally from the top of

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