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
Tatiana [17]
2 years ago
8

Plz don't copy from other people. 100 points. Brainliest

Physics
1 answer:
MissTica2 years ago
6 0
La gente de la cara de vuelta a las dos a las que y que no me ha
You might be interested in
A block of mass m moving due east at speed v collides with and sticks to a block of mass 2m that is moving at the same speed vv
lapo4ka [179]

Answer:

30.36°

Explanation:

By using linear momentum; linear momentum can be expressed by the relation:

mv_xi + mv_yj

where ;

m= mass

v_x = velocity of components in the x direction

v_y = velocity of components in the y direction

If we consider the east as the positive x and north as positive y which is synonymous to what we usually have on a graph.

Then;

Initial momentum = mvi + 2mvcos 45i + 2mvsin45 j

= (mv+2mvcos45)i + (2mvsin45)j

However, the masses stick together after collision and move with a common velocity: V_xi +V_yj

∴ Final momentum = 3mv (V_xi +V_yj)

= 3mV_xi + 3mV_yj

From the foregoing ;

initial momentum = final momentum

3mV_xi + 3mV_yj = (mv+2mvcos45)i+(2mvsin45j)

So;

3mV_x = mv + 2mv cos 45 \\\\3mV_y = 2mV sin 45

V_x = \frac{mv+2mvcos45 }{3m}\\\\V_x = \frac{v+2vcos45}{3}

V_y = \frac{2mvsin45}{3m} \\\\V_y = \frac{2vsin45}{3}

Finally;

The required angle θ = tan^{-1} = \frac{V_y}{V_x}

θ = tan^{-1} = \frac{\frac{2vsin45}{3}}{\frac{v+2v.cos45}{3}}

θ = tan^{-1} = \frac{2sin 45}{1+2cos45}\\\\

θ = 30.36°

7 0
3 years ago
Which trends is indirectly proportional to effective nuclear charge
Minchanka [31]

Answer:

Atomic size

Explanation:

In the periodic table , atomic size is indirectly proportional to the effective nuclear charge .the atomic size reduces from left to right across the table. This is because electrons are added to the same shell.

4 0
4 years ago
In the final situation below, the 8.0 kg box has been launched with a speed of 10.0 m/s across a frictionless surface. Find the
Murljashka [212]

Answer:

the energy of the spring at the start is 400 J.

Explanation:

Given;

mass of the box, m = 8.0 kg

final speed of the box, v = 10 m/s

Apply the principle of conservation of energy to determine the energy of the spring at the start;

Final Kinetic energy of the box = initial elastic potential energy of the spring

K.E = Ux

¹/₂mv² = Ux

¹/₂ x 8 x 10² = Ux

400 J = Ux

Therefore, the energy of the spring at the start is 400 J.

8 0
3 years ago
A stone is thrown vertically upward with a speed of 28.0 m/s how much time is required to reach this height
Solnce55 [7]
A stone is thrown vertically upward with a speed of 17.0 m/s. How fast is it moving when it reaches a height of 11.0 m? How long is required to reach this height?

Let’s review the 4 basic kinematic equations of motion for constant acceleration (this is a lesson – suggest you commit these to memory):

s = ut + ½ at^2 …. (1)

v^2 = u^2 + 2as …. (2)

v = u + at …. (3)

s = (u + v)t/2 …. (4)

where s is distance, u is initial velocity, v is final velocity, a is acceleration and t is time.

In this case, we know u = 17.0m/s, a = -g = -9.81m/s^2, s = 11.0m and we want to know v and t, so from equation (2):

v^2 = u^2 + 2as

v^2 = 17.0^2 -2(9.81)(11.0)

v = √73.18 = 8.55m/s

now from equation (3):

v = u + at

8.55 = 17.0 – 9.81t

t = (8.55 – 17.0)/(-9.81) = 0.86s
6 0
3 years ago
The rms current output in a circuit is 7.75 A. What is the maximum current?
Andru [333]
The maximum current in an ac circuit is related to the rms current by:
I_{rms} =  \frac{I_0}{ \sqrt{2} }
where I_{rms} is the rms current and I_0 is the maximum current.

If we re-arrange the formula and we use I_{rms}=7.75 A, we can find the value of the maximum current:
I_0 =  \sqrt{2} I_{rms} =  \sqrt{2}(7.75 A)=11.0 A
5 0
3 years ago
Other questions:
  • The presence of dwarf galaxies around the Milky Way supports what picture of our galaxy’s formation?
    8·1 answer
  • If you place a charged object next to an uncharged object that is a conductor:
    11·1 answer
  • Which statement is a fact regarding the Treaty of Versailles?
    14·2 answers
  • Plz help asap pic down below
    13·1 answer
  • The current in the wires of a circuit is 60 milliamps. If the resistance of the circuit were doubled (with no change in voltage)
    15·1 answer
  • Ashley, a psychology major, remarks that she has become interested in the study of intelligence. In other words, Ashley is inter
    11·1 answer
  • Emma draws another diagram showing how adding energy affects this wave. How does her new diagram compare to this diagram?
    6·1 answer
  • HELLLLLLLLLLLLLLP!!!!!!!!!!!!!!!!!!!!!!!!!!! PLSSSSSSSSSSSSSSSS
    7·1 answer
  • Conduction is the transfer of
    10·1 answer
  • Adrian plays basketball with Kevin on a basketball court that is completely level. After Adrian makes as basket, their ball roll
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!