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3 years ago

In order to be considered an ion, an atom must have a

2 answers:

7 0

The correct answer is charge

Any type of charge, positive or negative, as long as it is a charge. One type is called cation and the other an anion

Bezzdna [24]3 years ago

7 0

charge because it doesnt matter if it is a negative or positive

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Two identical point charges in outer space are held apart at a distance D. As soon as the charges are released, each begins movi

Karo-lina-s [1.5K]

The new acceleration is B) 4a

Explanation:

According to Newton's second law, the acceleration of an object is proportional to the force exerted on it:

$a=\frac{F}{m}$

where

F is the net force on the object

m is its mass

a is the acceleration

This means that we can analyze the problem in terms of the force involved. The electric force between the charges at the beginning is given by

$F=k\frac{q_1 q_2}{D^2}$

where:

$k=8.99\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

D is the separation between the two charges

Later, the charges are separated by a new distance

D' = D/2

Therefore, the new force between them is

$F'=k\frac{q_1 q_2}{(D/2)^2}=4(k\frac{q_1 q_2}{D^2})=4F$

So, the force has increased by a factor of 4: and since the acceleration is proportional to the force, this means that the acceleration has also increased by a factor of 4, so the correct choice is

B) 4a

Learn more about forces and acceleration:

brainly.com/question/11411375

brainly.com/question/1971321

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#LearnwithBrainly

7 0

3 years ago

If a ball is thrown vertically upward with a velocity of 160 ft/s, then its height after t seconds is s = 160t − 16t2. (a) What

romanna [79]

Answer:

s = 400 ft

The maximum height reached by the ball is 400 ft

Explanation:

Given;

Initial vertical velocity v = 160 ft/s

Height function s = 160t - 16t^2 ......1

The maximum height is reached when the change in height with respect to time is zero.

ds/dt = 0

Differentiating the height function;

ds/dt = 160 - 32t = 0

160 - 32t = 0

Solving for t;

32t = 160

t = 160/32

t = 5 seconds

Therefore, the maximum height is at t = 5;

Substituting into equation 1 (the height function)

s = 160(5) - 16(5^2)

s = 800 - 400

s = 400 ft

The maximum height reached by the ball is 400 ft

4 0

3 years ago

Which of the following ocean-floor features would contain the newest rocks?

Amiraneli [1.4K]

The further away from the mid-ocean ridge, the older the rocks are on the ocean floor. Therefore, the ocean floor feature that would contain the newest rocks would be the mid-ocean ridge.

7 0

3 years ago

Read 2 more answers

The maximum speed at which a patch of the surface moves during a vibration is 4.5 m/s . What is the amplitude of the vibration,

frutty [35]

Answer:

a) Angular frequency, w = 0.0184 rad/s

b) Amplitude of vibration = 245 m

Explanation:

a) Angular frequency, w = 2πf

f = 1/T, T = 5.7 minutes = 5.7 × 60 = 342 s

f = 1/342 = 0.00292 Hz or 0.00292/s

w = 2π (0.00292) = 0.0184 rad/s

b) Amplitude of simple harmonic motion,

displacement of simple harmonic motion, x(t) = A cos (wt-Φ)

A = amplitude

v = dx/dt = - Aw (sin (wt - Φ)

Velocity amplitude of simple harmonic motion = Amplitude × angular frequency

Amplitude = (velocity amplitude)/(angular frequency) = 4.5/0.0184 = 245m

Hope this Helps!!!

7 0

3 years ago

Consider a space shuttle which has a mass of about 1.0 x 105 kg and circles the Earth at an altitude of about 200.0 km. Calculat

kodGreya [7K]

Answer:

1.6675×10^-16N

Explanation:

The force of gravity that the space shuttle experiences is expressed as;

g = GM/r²

G is the gravitational constant

M is the mass = 1.0 x 10^5 kg

r is the altitude = 200km = 200,000m

Substitute into the formula

g = 6.67×10^-11 × 1.0×10^5/(2×10^5)²

g = 6.67×10^-6/4×10^10

g = 1.6675×10^{-6-10}

g = 1.6675×10^-16N

Hence the force of gravity experienced by the shuttle is 1.6675×10^-16N

7 0

3 years ago