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
Rufina [12.5K]
3 years ago
10

A hockey puck is pushed by a stick with a force of 750 newtons. The puck travels 2.0 meters in 0.30 seconds. How powerful is the

push?
1,500 W
5,000 W
112 W
450 W
Physics
2 answers:
Tamiku [17]3 years ago
6 0

The work done to push the puck is the product between the force F and the distance d:

W=Fd=(750 N)(2.0 m)=1500 J


And the power is the work done (W) per unit time (t):

P=\frac{W}{t}


Substituting the work done, W=1500 J, and the time taken, t=0.30 s, we find the power of the push:

P=\frac{1500 J}{0.30 s}=5000 W



lubasha [3.4K]3 years ago
6 0
Power, P = Force, F * Velocity, V

V = distance/time = 2/0.3 = 6.67 m/s

Therefore,
P = 750*6.67 = 5000 W

You might be interested in
Check cashing businesses do not require that an individual be an account holder; they will cash any valid check. True False
Romashka-Z-Leto [24]
True. Free trade means they can't refuse to give you cash for a check. If you want the check deposited to an account, that's another story.
3 0
3 years ago
Read 2 more answers
When the displacement of a mass on a spring in simple harmonic motion is A/2 from the equilibrium position, what fraction of the
KonstantinChe [14]

Answer:

The ratio is  KE : TM  =  0.75

Explanation:

from the question we are told that

  The displacement of a mass on a spring in simple harmonic motion is A/2 from the equilibrium position

Generally the total mechanical  energy of the mass is mathematically represented as

        TM  =  \frac{1}{2}  *  k  *  A^2

Here  k is the spring constant  ,  A is the total displacement of the  the mass  from maximum  compression to maximum extension of the spring

Generally this total mechanical energy is mathematically represented as

        TM  =  KE  + PE

=>     KE = TM  - PE

Here the potential  energy of the mass is mathematically represented as

     PE   = \frac{1}{ 2}  *  k *  [ x ]^2

Here x is the displacement of the mass from maximum compression or extension of the spring to equilibrium position and the value is  

      x = \frac{A}{2}

So

     PE   = \frac{1}{ 2}  *  k *  [ \frac{A}{2}  ]^2

So

      KE =  \frac{1}{2}  *  k  *  A^2 - \frac{1}{2}  *  k  *  [\frac{A}{2} ]^2

=>    KE =  \frac{1}{2}  *  k  *  A^2 - \frac{1}{8}  *  k  *  A ^2

=>    KE =  0.375  *  k  *  A^2

So the ratio of  KE :  TM is  mathematically represented as

       \frac{KE}{TM} =  \frac{0.375  k A^2 }{0.5 k A^2}

=>    \frac{KE}{TM} = 0.75

3 0
3 years ago
compare and contrast the medical understanding of death (that you have read about and learned about in this chapter) and the pop
mixer [17]

The medical understanding of death is related to the scientific approach, and the popular understanding is related to the inclusive spiritual and cultural approaches.

<h3 /><h3>What is death for science?</h3>

Death occurs when an individual's cardiorespiratory and brain functions cease due to some factor, thus ending his life.

Popular understanding, on the other hand, is aligned with scientific knowledge, but it is also encompassing cultural and religious teachings, which define topics not proven by science, such as life after death for example.

Therefore, death is a delicate topic for society, and spirituality is the basis found for greater emotional comfort in individuals who suffer significant losses of loved ones.

Find out more about scientific knowledge here:

brainly.com/question/1729104

#SPJ1

8 0
2 years ago
Sometimes students are taught that "air expands as it is heated". And sometimes they are taught that "as air expands it cools".
hram777 [196]

Answer:

Both are true under specific circumstances. And are related to Boyle's law. volume and pressure in a gas are inversely proportional.

Explanation:

There is a tendency to entropy in our reality, that is, in particular true and visible with gases, they tend to occupy the whole space where they are confined, when we heat a volume of gas, then the movement of the particles and in consequence the pressure of the gas increases and to compensate this the volume tends to be increased too, according to Boyle's law. And the opposite happens when the volume is increased, then the pressure is  relieved and since the particles are further one from each other, then the temperature is lower, and therefore it cools down.

7 0
4 years ago
When a 12 V battery is connected to a 6 uF capacitor, how much energy is stored
adoni [48]

The energy stored in a capacitor is

E = (1/2) · (capacitance) · (voltage)²

E = (1/2) · (6 x 10⁻⁶ F) · (12 V)²

E = (3 x 10⁻⁶ F) · (144 V²)

<em>E = 4.32 x 10⁻⁴ Joule</em>

(That's 0.000432 of a Joule)

4 0
3 years ago
Other questions:
  • A small wooden block with mass 0.750 kg is suspended from the lower end of a light cord that is 1.72 m long. The block is initia
    12·1 answer
  • Calculate the wavelength (in nm) of light that produces its first minimum at an angle of 21.0° when falling on a single slit of
    12·1 answer
  • In an experiment , which variable do you change
    9·1 answer
  • A 1000 kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16 s, then the motor sto
    9·1 answer
  • Light passes through a single slit. If the width of the slit is reduced, what happens to the width of the central bright fringe
    13·1 answer
  • Some sports or activities you can do to improve your overall health and how physical activity can improve your
    9·1 answer
  • The following number - 0.050437 - written to TWO significant figures would be
    12·1 answer
  • Science help please!!!!!!!!!!!!!!!!!!!
    9·2 answers
  • 1) A 2-kg object moving at 10 m/s has a 4-N force applied to it. Can you predict how the force will affect the object?
    11·1 answer
  • Electrical energy is sold by the kilowatt hour How much would it cost to heat a hot tub from 15 to 43
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!