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3 years ago

Which of these substances will form a basic solution in water? A. Ca(OH)2 B. H3PO4 C. H2SO4 D. HCl

Physics

1 answer:

podryga [215]3 years ago

3 0

Basic solutions are hydroxides therefore the answer is A ca(OH)2

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Objects with masses of 130 kg and a 430 kg are separated by 0.300 m.(a) Find the net gravitational force exerted by these object

fredd [130]

Answer

given,

mass of object

m₁ = 130 Kg

m₂ = 430 Kg

distance between them = 0.3 m

a) net force when 35 kg is place in between them

$F = \dfrac{GMm}{R^2}$

now,

$F = - \dfrac{6.67 \times 10^{-11}\times 130 \times 30}{0.15^2} +\dfrac{6.67 \times 10^{-11}\times 430 \times 30}{0.15^2}$

$F = 3.12 \times 10^{-5}\ N$

Direction of force will be toward the mass of 430 Kg

b) position where force will be zero

$F =-\dfrac{6.67 \times 10^{-11}\times 130 \times 30}{(0.3-x)^2} +\dfrac{6.67 \times 10^{-11}\times 430 \times 30}{x^2} = 0$

$-\dfrac{130}{(0.3-x)^2} +\dfrac{430}{x^2} = 0$

$x^2- 0.6 x + 0.09=\dfrac{130}{430}x^2$

$0.7 x^2- 0.6 x + 0.09 =0$

solving the above equation

x = 0.1936 m

the distance of third mass will be at x = 0.1936 m from 430 Kg mass.

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3 years ago

Pam rubs a balloon on her head to generate a static charge. She holds the balloon up against a wall. Which of the following desc

cestrela7 [59]

Answer:

Explanation:

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3 years ago

If two waves are traveling at the same speed, which statement will be true about their wavelengths? 1.The wave with higher frequ

Margarita [4]

I beleive that the wave with higher frequency will have shorter wavelength

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4 years ago

Rocks will eventually come from other rocks as described by the rock cycle. Given this, what do you think is the type of the old

RoseWind [281]

Answer:

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The Sedimentary Rocks is the type of the oldest rocks on Earth.

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Explanation:

LET ME KNOW IN THE COMMETS IF THIS HELPS PLZ HAVE A GREAT DAY AND CAN YOU PLZ MARK BRAINLIEST?

3 0

3 years ago

A race car starting from rest accelerates uniformly at 4.9 m/s^2. What is the car's speed after it has traveled 200 meters?

NeX [460]

The equation v²=u²+2as will help with solving this equation
v is what we are trying to find
u=0
a=4.9
s=200
v²=0²+2*4.9*200
v=√(2*4.9*200)
v=√1960
v=44.3 m/s (3 sf)

5 0

4 years ago

Read 2 more answers