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4 years ago

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What two things determine the stability of an atom? Check all that apply. A. How many electrons are in the atom B. How many neut

rons are in the atom C. How many protons are in the atom D. The ratio between the protons and the electrons

1 answer:

MrRissso [65]4 years ago

3 0

The answer is a and b

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Achargingbullelephantwithamassof5240kgcomesdi- rectly toward you with a speed of 4.55 m/s. You toss a 0.150-kg rubber ball at th

Ierofanga [76]

Answer:

Given:

Mass of elephant = 5240 kg

The initial speed of the elephant = 4.55 m/s

Mass of the rubber ball, m, = 0.15 kg

Inital speed of the rubber ball, v = 7.81 m/s

On substitution in $V_{2f}$ = $[\frac{2m_{1} }{m_{1} +m_{2} } ]V_{1f}$ + $[\frac{m_{2}-m_{1}}{m_{1}+m_{2} } ] v_{2f}$

$V_{2f}$ = $[\frac{2*5240_{} }{5240_{} +0.15_{} } ](-4.55_{})$ + $[\frac{0.15_{}-5240_{}}{5240_{}+0.15_{} } ] (7.81_{})$

a) The negatıve sign shows that the ball bounces back in the direction opposite to the incident

b) it is clear that the velocity of the ball increases and therefore it is kinetic energy . The ball gains kinetic energy from the elephant.

8 0

3 years ago

When does resonance occur?

bija089 [108]

Resonance occurs<span> when the amplitude of an object's oscillations are increased by the matching vibrations of another object.

Source: </span>Resonance: Definition & Transmission of Waves

4 0

4 years ago

Read 2 more answers

To rid the body of wastes, including excess water and salts" is the purpose of what human body system? A) Digestive B) Excretory

Verizon [17]

Digestive I believe.

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4 years ago

Read 2 more answers

A 50 V source is attached to a 9 Ohm light bulb, a 15 Ohm resistor, and a 17 Ohm resistor. What is the total resistance in the c

4vir4ik [10]

Answer:

41

Explanation:

4 0

3 years ago

3. a car takes off with initial velocity of 20m/s and move with uniform acceleration of 12m/s2 for 20s. It maintained a constant

lions [1.4K]

The total distance traveled by the car at the given velocity and time is 900 m.

The given parameters:

<em>initial velocity of the car, u = 20 m/s</em>
<em>acceleration of the car, a = 12 m/s²</em>
<em>time of motion of the car, t = 20 s</em>
<em>final time = 30 s</em>
<em>final acceleration = 2 m/s²</em>

The final time of motion of car before coming to rest is calculated as follows;

$v_f = v_0 -at\\\\0 = 20 - 2t\\\\t = 10 \ s$

The graph of the car's motion is in the image uploaded.

The total distance traveled by the car is calculated as follows;

$total \ distance = A \ + B \ + C\\\\total \ distance = (\frac{1 }{2} \times 20 \times 20) \ + (20 \times 30) \ + (\frac{1}{2}\times 10 \times 20)\\\\total \ distance = 900 \ m$

Thus, the total distance traveled by the car at the given velocity and time is 900 m.

Learn more about velocity-time graph here: brainly.com/question/24874645

3 0

3 years ago