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
sashaice [31]
3 years ago
14

A little girl riding a train rolls a ball toward the back of the train at 1.25 m/s NE. The train is traveling at a velocity of 1

3.22 m/s SW. The little girl's brother runs from the back of the train, toward the rolling ball at a velocity of 1.45 m/s SW. Relative to the little girl's brother, what is the velocity of the rolling ball?
Physics
1 answer:
Lelechka [254]3 years ago
4 0

Answer:

Answer: 2.70m/s NE

Explanation:

Just did it.

You might be interested in
An object has a kinetic energy of 14 J and a mass of 17 kg , how fast is the object moving?
lisabon 2012 [21]
v ^{2} = Joules ÷ (0.5×Kilograms)

14J ÷ 8.5 = 1.64705882

Remember, 1.64705882 = v², so we need to find the square root.

The square root of 1.64705882 is 1.283377894464448

Hope this helps! 
6 0
3 years ago
Read 2 more answers
When waves of equal amplitude from two sources are out of phase when they interact it is called?
Verizon [17]
I believe destructive interference
6 0
2 years ago
What can be found by counting the number of troughs per second in a wave diagram? amplitude direction frequency speed wavelength
Nutka1998 [239]
The period T is time it takes for one complete cycle or from "trough to trough" so the reverse is trough per sec = 1/T = frequency
6 0
3 years ago
Read 2 more answers
a tank circuit contains a capacitor and an inductor that produce 30 of reactance at the resonant frequency. the inductor has a q
Romashka-Z-Leto [24]

The total circuit current at the resonant frequency is 0.61 amps

What is a LC Circuit?

  • A capacitor and an inductor, denoted by the letters "C" and "L," respectively, make up an LC circuit, also referred to as a tank circuit, a tuned circuit, or a resonant circuit.
  • These circuits are used to create signals at particular frequencies or to receive signals from more complicated signals at particular frequencies.

Q =15 = (wL)/R

wL = 30 ohms = Xl

R = 2 ohms

Zs = R + jXl = 2 +j30 ohms where Zs is the series LR impedance

| Zs | = 30.07 <86.2° ohms

Xc = 1/(wC) = 30 ohms

The impedance of the LC circuit is found from:

Zp = (Zs)(-jXc)/( Zs -jXc)

Zp = (2+j30)(-j30)/(2 + j30-j30) = (900 -j60)2 = 450 -j30 = 451 < -3.81°

I capacitor = 277/-j30 = j9.23 amps

I Zs = 277/(2 +j30) = (554 - j8,310)/904 = 0.61 - j9.19 amps

I net = I cap + I Zs = 0.61 + j0.04 amps = 0.61 < 3.75° amps

Hence, the total circuit current at the resonant frequency is 0.61 amps

To learn more about LC Circuit from the given link

brainly.com/question/29383434

#SPJ4

5 0
1 year ago
How does urban development affect earths environment
erastovalidia [21]
the polluted urban environment affects the health and quality of life
7 0
3 years ago
Other questions:
  • While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffi
    12·1 answer
  • Which statement best defines work? A. Work is the time it takes to move an object once acted upon by a force. B. Work occurs whe
    10·2 answers
  • Solar-powered cars use energy from the Sun to work. A panel on the car absorbs light energy from the Sun, which then generates a
    11·2 answers
  • An object is accelerating if there is a change in speed and/ or which factor A.Time B.Position C.Direction D.Displacment
    5·2 answers
  • A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift i
    13·1 answer
  • Relate the changes in molecular motion of particles as hey change from solid to liquid to gas.
    8·1 answer
  • Which diagram shows the most likely effect when a rock is weathered by water flowing over its entire surface
    13·1 answer
  • There are screws all around you. Name five examples of screws that you see in everyday life? Think broadly!
    6·1 answer
  • If a 20.0 g object at a temperature of 35.0∘C has a specific heat of 2.89Jg∘C, and it releases 450. J into the atmosphere, what
    9·2 answers
  • How much heat transfer is necessary to raise the temperature of a 13.6 kg piece of ice from −20.0ºC to 130ºC? specific heat capa
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!