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
juin [17]
3 years ago
9

Two kids are playing tag. The first kid is running at an unknown speed chasing the other. The first kid has a mass of 25 kg and

a KE of 450 J.
How fast is the first kid running?
I really need help
Physics
1 answer:
Monica [59]3 years ago
3 0

Answer:

1mph

Explanation:

You might be interested in
How remove local action and polarization ​
slava [35]

Answer:

Local action is removed by amalgamating zinc rod.

Explanation:

This prevents chemical reaction to occur because impurities in the zinc cannot get into contact with an electrolyte.

8 0
3 years ago
A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is
ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

s=ut+\frac{1}{2}at^2\\\Rightarrow 21=4.5t+\frac{1}{2}\times -9.8\times t^2\\\Rightarrow 21=-4.5t-4.9t^2\\\Rightarrow 4.9t^2+4.5t-28=0\\\Rightarrow 49t^2+45t-280=0

Solving the above equation we get

t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89

So, the time the package was in the air is 1.97 seconds

3 0
3 years ago
Students perform an experiment in which they drop two eggs with equal mass from a balcony. In the first trial, the egg hits the
shepuryov [24]

<u> Answer </u>

The impulse on the second trial is smaller is smaller than in the first trial.

<u>Explanation </u>

Impose of a body is that change in momentum during a time interval. If the change of momentum takes longer then, the impulse of a force is less. I a moving object hits a hard surface the rate of change of momentum is very high. e.i in the first trial, the egg breaks because it hits the hard surface(ground).

In the second trial, the foam cushion absorbs the shock and prolongs the time of impact with the egg hence decreasing the impulse.


8 0
3 years ago
Read 2 more answers
Acid rain is formed when chemicals in the air get into rain and up the acidity levels.
tester [92]
False! Because the acid rain it becomes a chemicals it does not air get into the rain and up the acidity levels.
Hope it helped you.

-Charlie


:)
5 0
3 years ago
Read 2 more answers
What is the force of a object that has a mass of 7 kg and an acceleration of 6 m/s/s
UkoKoshka [18]

Answer:

<h2>42 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question

mass = 7 kg

acceleration = 6 m/s²

We have

force = 7 × 6 = 42

We have the final answer as

<h3>42 N</h3>

Hope this helps you

7 0
2 years ago
Other questions:
  • A point charge of 8.0 C is placed 0.050 m from a rod that has an electric field of 1.5 × 103 N/C. What is the electric potential
    5·2 answers
  • What is a characteristic of a default static route? ​?
    10·1 answer
  • A car traveling at 40 ft/sec decelerates at a constant 5 feet per second per second. how many feet does the car travel before co
    15·1 answer
  • How did tycho brahe's model of the universe differ from the greek geocentric model?
    15·1 answer
  • What quantity do units represent in a value?
    8·2 answers
  • Explain how carbon is cycled between the hydrosphere and geosphere. Use specific examples.
    7·1 answer
  • Two racecars are driving at constant speeds around a circular track. both cars are the same distance away from the center of the
    12·1 answer
  • Please help on this one? :)
    7·1 answer
  • What is the acceleration of a 1000 kg car subject to a 550 N net force
    10·1 answer
  • →13 Points← List the four key principles for Newton’s 3rd law:
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!