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
Natasha_Volkova [10]
3 years ago
7

Help me i have little time left i will give brainliest

Physics
1 answer:
eimsori [14]3 years ago
6 0

Answer:

Explanation:

Conservation of momentum

Initial momentum is zero

3.0(6.0) + 7.0v = 0

v = -18/7 = - 2.57142857...

|v| = 2.6 m/s

You might be interested in
What is a force that attracts all matter to each other?
Temka [501]
The answer is gravity. I hope this helps. 
5 0
3 years ago
Read 2 more answers
List the three main things necessary to build an electromagnet.
Arturiano [62]

Answer:

Electromagnets are special types of magnets that are made by passing current through coils of wire. To make an electromagnet, the minimum requirements are:

1. A nail (usually made of iron, steel or zinc)

2. Dry cell batteries

3. Wire (Usually copper wire)

Other things could be:

1. Electric tape to hold both ends of the wire properly at the battery terminals.

2. Scissors to cut the wire into desired length.

3. Iron fillings for testing purposes.

7 0
3 years ago
A 53.0-kg skater is traveling due east at a speed of 2.90 m/s. A 72.0-kg skater is moving due south at a speed of 6.20 m/s. They
soldier1979 [14.2K]

Answer:

a.\thta=71^{\circ}

b.v_f=3.78 m/s

Explanation:

We are given that

m_1=53 kg

v_1=2.9 m/s

m_2= 72 kg

v_2=6.2 m/s

a.We have to find the angle

\theta=tan^{-1}{\frac{m_2v_2}{m_1v_1}=\frac{72(6.2)}{53(2.9)}=71^{\circ}

\theta=71^{\circ}

b. We have to find the speed v_f

According to law of conservation of momentum

m_1v_1=(m_1+m_2)v_fcos\theta

53(2.9)=(53+72)v_fcos 71^{\circ}=40.7 v_f

v_f=\frac{153.7}{40.7}=3.78 m/s

3 0
3 years ago
B) Calculate the net work required to bring a 1300 kg car moving at 30 m/s to rest.
prohojiy [21]

I Lolo my name is keshav and

5 0
3 years ago
The origin of the universe remains a question. true false
OleMash [197]
True ..............................
8 0
3 years ago
Other questions:
  • Which of the following is an example of matter?
    14·2 answers
  • Si se suelta una moneda desde lo alto de una casa, su velocidad inicial es <br> 4 puntos
    13·1 answer
  • The morning after a massive snowstorm, Michaela gets into her car to drive to work. The storm caused her windows to freeze, so s
    13·1 answer
  • How do you determine the acceleration of an object?
    9·2 answers
  • Using complete sentences, explain why graphs are so important to scientists.
    15·1 answer
  • What can Lisa do to increase the strength of the electromagnet?
    5·1 answer
  • A tuning fork with a frequency of 404 Hertz is struck with a soft hammer. The fork is struck a second time by the
    6·1 answer
  • Find the energy in Joules required to lift a 55.0 Megagram object a distance of 500 cm.
    11·1 answer
  • An elephant's legs have a reasonably uniform cross section from top to bottom, and they are quite long, pivoting high on the ani
    7·1 answer
  • A falcon can descend with a speed 250 km/h. If a falcon flies at this speed for 2.0 s and then flies a 100 m in 2.5 s, what is t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!