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
MA_775_DIABLO [31]
3 years ago
14

A medicine ball has a mass of 5kg and is thrown with a speed of 3 m/sec what is it's kinetic energy

Physics
1 answer:
marissa [1.9K]3 years ago
8 0
KE = 1/2mv^2

KE = 1/2 (5kg)(3m/s)

KE = 22.5 J
You might be interested in
3. The direction of the centripetal force acting on a ball on a string being spun in a circle around a person is
ruslelena [56]

D. center seeking. Good Luck

4 0
3 years ago
Read 2 more answers
A ruby laser delivers a 16.0-ns pulse of 4.20-MW average power. If the photons have a wavelength of 694.3 nm, how many are conta
stepan [7]

Answer:

The  value is  n  =  2.347 *10^{17} \  photons

Explanation:

From the question we are told that

     The  amount of power delivered is  P  =  4.20 \  M W  =  4.20  *10^{6} \  W

      The  time taken is  t =  16.0ns  =  16.0 *10^{-9} \  s

       The  wavelength is  \lambda  =  694.3 \  nm =  694.3 *10^{-9} \  m

     

Generally the energy delivered is  mathematically represented as

     E  =  P  * t  =  \frac{n  *  h  *  c  }{\lambda }

Where  h is the Planck's constant with value  h  =  6.262  *10^{-34} \  J \cdot  s

           c  is the speed of light with value  c =  3.0*10^{8} \  m/s

     

So  

    4.20 *10^{6}  *  16*10^{-9}=  \frac{n  *  6.626 *10^{-34}  *  3.0*10^{8}  }{694.3 *10^{-9}}

=>    n  =  2.347 *10^{17} \  photons

4 0
3 years ago
A stiff wire 32.5 cm long is bent at a right angle in the middle. One section lies along the z axis and the other is along the l
Flauer [41]

Answer: i personally think it would be 789

Explanation:

Hopefully I am right

4 0
3 years ago
A 29.1 liter tank contains ideal helium gas at 35.8°C and a pressure of 21.8 atm How many moles of gas are in the tank?
crimeas [40]

Answer:

No. of moles, n = 25.022 moles

Given:

Volume of gas in tank, V = 29.1 l

Temperate of gas, T = 35.8^{\circ} = 273 + 35.8 = 308.8 K

Pressure of gas, P = 21.8 atm

Solution:

Making use of the ideal gas equation which given as:

PV = nRT

where

R = Rydberg's constant = 0.0821 L-atm/mol-K

Re-arranging the above formula for 'n' and putting the values in the above formula:

n = \frac{PV}{RT}

n = \frac{21.8\times 29.1}{0.0821\times 308.8}

n = 25.022

3 0
3 years ago
The speed of light in a vacuum is approximately 0.3 gm/s. What is the speed of light in meters per second?
klemol [59]

We have to convert Gm/s to m/s.

As  1 \ Gm/s = 10^9 \ m/s

Therefore the speed of light in vacuum,

c = 0.3 \ Gm/s = 0.3 \times 10^9 \ m/s \\\\ c= 3 \times 10^8 \ m/s

Thus, the speed of light in m/s is 3 \times 10^8 \ m/s

7 0
3 years ago
Other questions:
  • A 0.18 m radius pulley is free to rotate about a horizontal axis. A mass and a mass are attached by a massless string, which is
    12·1 answer
  • WILL GIVE BRAINLIEST AND 30 POINTS!
    8·2 answers
  • What is the term that describes the amount of water in a volume of air at a specific temperature compared to the amount of water
    9·2 answers
  • During an autopsy and subsequent toxicology reports, it is discovered that a man died from arsenic poisoning. When investigating
    10·1 answer
  • A sheet of aluminum (al) foil has a total area of 1.000 ft2 and a mass of 3.716 g. what is the thickness of the foil in millimet
    9·1 answer
  • Northrop aircraft developed and built a deceleration sled to test the effects of the extreme forces on humans and equipment. In
    7·1 answer
  • Which property do gas particles at the same temperature share?
    8·2 answers
  • A proton accelerates from rest in a uniform electric field of 610 N/C. At some later time, its speed is 1.4 106 m/s.(a) Find the
    5·1 answer
  • Which portion of the electromagnetic spectrum is used to identify fluorescent minerals?
    5·1 answer
  • Please round 1045.2 to three significant digits
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!