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
Lorico [155]
3 years ago
6

These questions !plz !! i need help!!!

Physics
1 answer:
Nataly_w [17]3 years ago
3 0

(6) Wagon B is at rest so it has no momentum at the start. If <em>v</em> is the velocity of the wagons locked together, then

(140 kg) (15 m/s) = (140 kg + 200 kg) <em>v</em>

==>   <em>v</em> ≈ 6.2 m/s

(7) False. If you double the time it takes to perform the same amount of work, then you <u>halve</u> the power output:

<em>E</em> <em>/</em> (2<em>t </em>) = 1/2 × <em>E/t</em> = 1/2 <em>P</em>

<em />

You might be interested in
You can use any coordinate system you like in order to solve a projectile motion problem. To demonstrate the truth of this state
posledela

Answer:

a)  y₂ = 49.1 m ,    t = 1.02 s , b)   y = 49.1 m , t= 1.02 s

Explanation:

a) We will solve this problem with the missile launch kinematic equations, to find the maximum height, at this point the vertical speed is zero

            v_{y}² = v_{oy}² - 2 g (y –yo)

The origin of the coordinate system is on the floor and the ball is thrown from a height

           y-yo = v_{oy}² /2 g&#10;            y- 0 = 10.0²/2 9.8&#10;            y - 0 = 5.10 m&#10;            &#10;The height from the ground is the height that rises from the reference system plus the depth of the ground from the reference system&#10;             y₂ = 5.1 + 44&#10;             y₂ = 49.1 m&#10;Let's use the other equation to find the time&#10;              [tex]v_{y} = v_{oy} - g t

              t = v_{oy} / g

              t = 10 / 9.8

              t = 1.02 s

b) the maximum height

            y- 44.0 = v_{y}² / 2 g

            y - 44.0 = 5.1

            y = 5.1 +44.0

            y = 49.1 m

The time is the same because it does not depend on the initial height

              t = 1.02 s

7 0
3 years ago
What is a bond between a positive and a negative ion charge?
klasskru [66]

Answer:

Ionic Bond

Explanation:

5 0
2 years ago
Read 2 more answers
What is the device used to detect and measure current?
dybincka [34]
The Ammeter is used to detect and measure current or amperage. Also a more common tool now used is a multimeter that detects and measures voltage, current, and resistance.

Any questions please just ask. Thank you.
6 0
3 years ago
Read 2 more answers
Which statement best describes metallic bonding
horrorfan [7]

Answer:

It's a type of chemical bonding that rises from the electrostatic attractive force between conduction electrons and positively charged metal bars. It can also be described as the sharing of free electrons among a structure of positively charged ions

4 0
2 years ago
Unlike mechanical waves such as sound or earthquake waves, EM waves can travel through empty space. True or false
Alex777 [14]

Answer:

its true

Explanation:

5 0
2 years ago
Other questions:
  • An external resistor with resistance R is connected to a battery that has emf ε and internal resistance r. Let P be the electric
    5·1 answer
  • Which expression should appear in the blue box to compute percent error? Accepted value – Experimental value Accepted value × Ex
    6·1 answer
  • Four identical metallic spheres with charges of 2.2 µC, 4.2 µC, −7.4 µC, and −6.8 µC are placed on a piece of paper. The paper i
    13·1 answer
  • The pressure gauge on a tank registers the gauge pressure, which is the difference between the interior pressure and exterior pr
    5·1 answer
  • The term solstice translates as "Sun stop." Explain why this translation makes sense from an astronomical point of view. It make
    10·2 answers
  • Which describes one event that causes an eclipse?
    5·1 answer
  • A good alternative to sit ups is<br><br> A. Crunches<br><br> B. Leg Raises<br><br> C. Side Twists
    9·1 answer
  • If you increase the frequency of a wave by 5x whats it’s period?
    15·1 answer
  • Object's velocity change
    14·1 answer
  • A restaurant records the number of tables served each night, and the results have the values: minimum = 3, lower quartile = 14,
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!