**Answer:**

**KE = 1/2 M v^2 kinetic energy of projectile**

**KE = 1/2 * 20 * (54 m/s)^2 = work done on projectile**

**W = 10 * 54^2 = work done on projectile**

**W = 29,160 J**

**Answer:**

Increased by 16 times

**Explanation:**

F = Gravitational force between two bodies

G = Gravitational constant = 6.67408 × 10⁻¹¹ m³/kg s²

m₁ = Mass of one body

m₂ = Mass of other body

d = distance between the two bodies

∴Force will increase 16 times

Finding out the acceleration 12/3 = 4m/s^2

thus it is descending so the actual acceleration would be 9.8-4 = 5.8 m/s^2

the weight will be 90*5.8 = 522 N

522/9.8 = 53.2 kg

Answer:

Explanation:

Hi! It would be A. Plane mirrors produce only virtual images,and concave mirrors produce real and virtual images.

From the information provided in the question, the **total mass **of the **nucleons **is **60.49218 u.**

<h3>What are nucleons?</h3>

The term **nucleons **refers to both the **neutrons **and the **protons **that are found in the nucleus of atoms. We have the following information;

Mass of Proton:** 1. 007825 u**

Mass of Neutron: **1. 008665 u**

Mass of 27 neutrons = 27(1. 008665 u) =** 27.233955**

Mass of 33 protons = 33(1. 007825 u) = **33.258225**

Total mass of nucleons = 27.233955 + 33.258225 = **60.49218 u**

Learn more about **nucleons**: brainly.com/question/9662870