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
denpristay [2]
3 years ago
8

How fast is a 90kg man running if his kinetic energy is 720 J?

Physics
1 answer:
zheka24 [161]3 years ago
6 0
Answer:
4 m/s
Explanation:
KE=1/2mv^2
720=1/2(90)
720=45v^2
divide by 45
16= v^2
over the square root
4=v
v= 4m/s
You might be interested in
A student attaches a block to a vertical spring of unknown spring constant so that the block-spring system will oscillate if the
chubhunter [2.5K]

Answer:

x axis

Explanation:

3 0
2 years ago
Read 2 more answers
An intravenous (IV) system is supplying saline solution to a patient at the rate of 0.06 cm3/s through a needle of radius 0.2 mm
horsena [70]

Answer:

Pressure applied to the needle is 7528 Pa

Explanation:

As we know by poiseuille's law of flow of liquid through a cylindrical pipe

the rate of flow through the pipe is given as

Q = \frac{\Delta P \pi r^4}{8\eta L}

now we know that

Q = 0.06 \times 10^{-6} m^3/s

radius = 0.2 mm

Length = 6.32 cm

\eta = 1\times 10^{-3} Pa s

now we have

6 \times 10^{-8} = \frac{\Delta P \pi (0.2 \times 10^{-3})^4}{8(1 \times 10^{-3})6.32 \times 10^{-2}}

3.03 \times 10^{-11} = \Delta P 5.02 \times 10^{-15}

\Delta P = 6028 Pa

now we have

P - 1500 = 6028 Pa

P = 7528 Pa

8 0
3 years ago
1. Where is the water in the pot going?
Citrus2011 [14]

Answer:

   

Explanation:

   

3 0
2 years ago
Explain how surface and subsurface events are integral parts of the rock cycle.
vagabundo [1.1K]
Example of surface events are erosion and weathering. Erosion is the carrying of a particle from one place to the other and weathering is the breaking down of particles. These processes help in rock formation because this allows physical changes (grouping together or breaking down) on a certain substance. Subsurface events are those which happened underground such as the flow of underground water which subsequently allow the deposition of minerals, etc. 
3 0
3 years ago
Secondary evidence is the basis for drawing scientific conclusions is this true ir false
Leto [7]
The statement: "secondary evidence is the basis for drawing scientific conclusions" is definitely false. Secondary evidence is the body of information obtained to prove the existence of unknown or missing primary evidence. In drawing scientific conclusions, primary evidence is needed.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Naturally occurring element x exists in three isotopic forms: x-28 (27.977 amu, 92.23% abundance), x-29 (28.976 amu, 4.67% abund
    11·1 answer
  • A model of a helicopter rotor has four blades, each of length 3.0 m from the central shaft to the blade tip. The model is rotate
    5·1 answer
  • A solid metal can absorb heat from another object through which method of heat transfer?
    9·2 answers
  • Thank you for your help !
    9·1 answer
  • What do you call a wave that is made up of electromagnetic feilds
    9·2 answers
  • Three moles of neon expand isothermally from 0.163 m3 to 0.254 m3 while 5.09 × 103 J of heat flows into the gas. Assuming that n
    11·1 answer
  • A car is stopped at a red light. When the light turns green, it accelerates up
    10·1 answer
  • In 1976, a 53 kg helicopter was built in Denmark. Suppose this helicopter flew east with a speed of 60.0 m/s and the total momen
    5·1 answer
  • 1When you look through a magnifying glass, the objects you are looking at
    14·1 answer
  • Angles t and v are complementary.angles T has a mesure of (2X+10). Angle v has a measure of 48 what is the value of x
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!