1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nataliya [291]
3 years ago
9

Which of the following statements is true?

Physics
2 answers:
artcher [175]3 years ago
8 0
The nucleus of an atom contains protons and neutrons
zmey [24]3 years ago
7 0
The nucleus of an atom contain protons and neutrons

You might be interested in
During an experiment, a scientist places a heat lamp above a bowl of water and uses the lamp to heat up the water. How does heat
alexandr402 [8]

Answer:

radiation

Explanation:

6 0
2 years ago
Read 2 more answers
Free Fall: A rock is thrown directly upward from the edge of a flat roof of a building that is 56.3 meters tall. The rock misses
Slav-nsk [51]

Answer:

v₀₁= 5.525 m / s

Explanation

Freefall Formulas :

The sign of acceleration due to gravity  (g) is positive if the object is going down and negative if the object is going up.

vf= v₀+gt  

vf²=v₀²+2*g*h

h= v₀t+ (1/2)*g*t²

Where:  

h: hight in meters (m)    

t : time in seconds (s)

v₀: initial speed in m/s  

vf: final speed in m/s  

g: acceleration due to gravity in m/s²

Kinematics of the rock from the starting point with vo until it reaches its maximum height:

vf₁= v₀₁-gt₁  :vf₁ =0 to maximum height

0= v₀₁-gt₁

v₀₁ = g*t₁

t₁ =v₀₁ / g      Equation (1)

vf₁²= v₀₁²-2*g*h₁   : vf₁ =0 to maximum height

0 = v₀₁²-2*g*h₁

2*g*h₁ = v₀₁²

h₁ = (v₀₁²)/(2g)   Equation (2)

Kinematics of the rock when it falls from the maximum height until it touches the floor

h₂= v₀₂t+ (1/2)*g*t₂²  v₀₂=vf₁ =0

h₂= 0+ (1/2)*g*t₂²

h₂= (1/2)*g*t₂²   Equation (3)

Equation that relates h₁ to h₂

h₂=  h₁ + 56.3  ,  h₁ = (v₀₁²)/(2g)

h₂= (v₀₁²)/(2g) + 56.3  Equation (4)

Equation that relates t₁ to t₂

t₁ + t₂ =4 s

t₂ =4 -t₁

t₂ =4 -(v₀₁/g )

Calculation of v₀₁

We replace equation 4 and equation 5 in equation 3

(v₀₁²)/(2g) + 56.3 = (1/2)*g*(4 -(v₀₁/g ) )²

(v₀₁²)/(2g) + 56.3 = (1/2)*g* (16 - 2*4*(v₀₁/g )+((v₀₁/g )²)

we eliminate (v₀₁²)/(2g) on both sides of the equation

56.3 = (1/2)*g* (16 - 2*4*(v₀₁/g ))

56.3 = 78.4 - 4*v₀₁

4*v₀₁ =78.4-56.3

v₀₁= (78.4-56.3) / ( 4)

v₀₁= 5.525 m / s

7 0
3 years ago
How tilted is the axis of the earth's rotation as compared to the plane of the earth's orbit?
Phantasy [73]
C. 23.5 degrees
This tilt in the axis causes the seasons. 
Hope this helps.
6 0
2 years ago
Read 2 more answers
Is this a boy or a girl
ivanzaharov [21]

I believe that it is a boy but if they would like to be classified as a girl or a boy their decision needs to be respected

3 0
2 years ago
The length of your eye decreases slightly as you age, making the lens a bit closer to the retina. Suppose a man had his vision s
julia-pushkina [17]

Answer:

<h2>A. Nearsightedness</h2>

Explanation:

A nearsightedness is an eye defect that occurs when someone is only able to see close ranged object but not far distance object. According to the question, if the length of my eye decreases slightly as I age, this means there is a possibility that I will find it difficult to view a far distance object as I age.

At 70, once my eyes had decreased slightly in length, this means I will only be able to see close ranged object but not far distant object, showing that I am now suffering from nearsightedness according to its definition above.

4 0
3 years ago
Other questions:
  • A parallel-plate capacitor, with air between the plates, is connected across a voltage source. This source establishes a potenti
    10·1 answer
  • Explain the difference between impulse and impulsive force?
    5·1 answer
  • You have two points in a soil. Point A is at 75 cm; point B is at 25 cm above the reference. The capillary potential energy at p
    6·1 answer
  • Desde una altura de 120 m se deja caer un cuerpo. Calcular a los 2,5 s i) la rapidez que lleva; ii) cuánto ha descendido; iii) c
    9·1 answer
  • As the temperature of a sample of gas decreases, the kinetic energy of the particles _____.
    14·1 answer
  • If Phoenix, Arizona, experiences a cool, wet day in June, does that mean the regions climate is changing?
    15·1 answer
  • A block on a rough, horizontal surface is attached to a horizontal spring of negligible mass. The other end of the spring is att
    9·1 answer
  • Why do our eyes see the color red when we look at a tomato?
    7·2 answers
  • HEY GUYS IS THIS TRUE OR FALSE????????
    12·2 answers
  • 1. Stored energy or energy due to position is known as ____________________ energy
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!