To solve this problem we will apply the kinematic equations of linear movement. For this purpose we will begin to define the final speed of the body before hitting the street. The first equation will begin using the difference in velocities as a function of acceleration (gravity) and position. And the second will use the concept of acceleration, time and speed, to find the time variable.

PART A) Equation of motion is

Replacing,

The speed of rock before hitting the ground is 32.74m/s

PART B) Equation of motion

Therefore the time taken by the rock is 5.58s

The electric field between two plates is **40 V/m.**

To find the electric field between two plates, the values are given are,

distance = 3 cm

Voltage v = 120 v

<h3>What is electric field between two plates?</h3>

The **electric field** between plates is the **area **where the charges between two plates, **influences **can be seen. For **example**, if a **charged **particle is placed **near **any charged **plate**, the plate exerts an **electric force **to **attract **or **repel **the charged particle.

Formula is given as,

** E = V / d (v/m)**

**Substituting **the given values,

= 120 /3

=40 v/m

Hence, the answer is **40 v/m.**

Learn more about **electric field,**

brainly.com/question/8971780

**Answer:**

Hello! Your answer is** BELOW**

**Explanation:**

1.About 91.754% of all iron is iron-56. Of all nuclides, iron-56 has the lowest mass per nucleon. With 8.8 MeV binding energy per nucleon, iron-56 is one of the most tightly bound nuclei.

2.The atomic weight of lead is quite variable in nature because the three heaviest isotopes are the stable end-products of the radioactive decay of uranium (238U to 206Pb and 235U to 207Pb) and thorium (232Th to 208Pb).

3.Mass defect for uranium-238 is 3.983 × 10-25 kg.

4.Energy and Mass Are Relative

The equation E = mc^2 states that the amount of energy possessed by an object is equal to its mass multiplied by the square of the speed of light.

Hope I helped! Ask me anything if you have any questions. Brainiest plz!♥ Hope you make a 100%. Have a nice morning! -Amelia♥