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
fiasKO [112]
3 years ago
6

Three eyewitnesses at the scene of a car accident were asked how long the accident lasted. They responded with 11 seconds, 12 se

conds, and 11 seconds. The traffic camera recorded the accident and it actually lasted 7 seconds. What can be said about the times stated by the eyewitnesses?
Physics
1 answer:
Elanso [62]3 years ago
3 0
They were not accurate nor precise.
You might be interested in
Why was nuclear energy first developed?
Helga [31]

Nuclear energy was not developed.  It has existed for as long as time has existed, that is, since the big bang.

The thing that was developed was humans' ability to USE nuclear energy, to do what we want it to do, when we want it to do it.

The reason this was first developed was to bomb the holy beans out of Japan, in order to win World War II.

Today (2020), nine of the world's nations are known to have 14,285 nuclear bombs in storage, for the same general purpose.  Seven of these nations are storing 1,170 of these bombs (about 8 percent), and the USA and Russia have all the rest ... 13,035 nuclear bombs.

All nine of these nations promise that they have no plan to use their bombs, they don't want to use them, it would be wrong and terrible to use them, and they will never be the first to use them, but they need to modernize their bombs so that theirs are better than anybody else's bombs, and they need to keep their bombs for as long as anybody else has any, and then maybe a little longer, just in case.

In the years after the ability to bomb the holy beans out of other people was developed, and enough equipment was built to do it 14 thousand times, the ability to use nuclear energy for other purposes was also developed.  It's used now to generate electrical energy, and to do several jobs in Medical science.  

7 0
2 years ago
A particle hangs from a spring and oscillates with a period of 0.2s.If the mass-spring system remained at rest, by how much woul
photoshop1234 [79]

Answer:

The distance the mass would stretch it is    x = 0.00992948

The correct option is A

Explanation:

From the question we are told that

           The period of the slit is T = 0.2s

           The acceleration due to gravity is g =9.8 m/s^2

Generally the period is mathematically represented as

                     T = 2 \pi \sqrt{\frac{m}{k} }

          Whee m is the particle and k is the spring constant

        making \frac{m}{k} the subject

                        \frac{m}{k}  = [\frac{T}{2 \pi} ]^2

The weight on the particle is related to the force stretching the spring by this mathematical relation

               W = F_s

              mg = kx

where x is the length by which the spring is stretched

          \frac{m}{k}  = \frac{x}{g}

Substituting the equation above for \frac{m}{k}

            [\frac{T}{2 \pi} ]^2 = \frac{x}{g}

making x the subject

              x = g [\frac{T}{2 \pi} ]

Substituting the value

            x = 9.8 * [\frac{0.2}{2 * 3.142} ]^2

            x = 0.00992948

6 0
3 years ago
Read 2 more answers
William drew a diagram of a box containing a gas for his science project. His drawing is shown.
Olin [163]
Question? U need a drawing
7 0
2 years ago
A small bead of mass m is constrained to slide without friction inside a circular vertical hoop of radius r which rotates about
Stolb23 [73]

Answer:

Explanation:

The bead is moving on a vertical circular path so it must have a centripetal force towards the centre.

This force is equal to m v² / r

v is velocity of bead and r is radius of the circular path.

The vertical hoop is also rotating about a vertical axis passing through the centre at frequency f so the bead will experience a cetrifugal force due to rotation of the hoop. Its value is

m ω² r . Only at the point o degree and 180 degree , these forces are opposite to each other so at these points , the bead will be in equilibrium .

mv² / r = m ω² r

v² = ω² r²

v = ω r

= 2π f r

= 2 x 3.14 x 2 x 0.22

v = 2.76 m /s

For the bead to rise upto point θ = 90 degree , height achieved is radius R

required velocity = √ 2gR

= √ 2x 9.8x.22

= 2.076 m/s

This velocity is less than the velocity calculated earlier so the bead will be able to ride the required height.

v = 2.76 m/s

5 0
3 years ago
Through which element would someone most likely receive a shock
Elenna [48]

Gold or copper than silver

7 0
3 years ago
Read 2 more answers
Other questions:
  • You riding in a car traveling at a speed of 73 mi/hr in a. 60 mi/hr zone, when suddenly you spot a police car parked 20 ft ahead
    15·2 answers
  • Looking at the periodic table which element would you think is the best conductor of electricity?
    12·1 answer
  • An arctic fox has thick, dense fur in the winter and much shorter fur in the summer. How does this help the fox maintain homeost
    14·2 answers
  • Astronomy can best be described as a/an
    7·2 answers
  • 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
    10·2 answers
  • Which of these activities performed by a chemist is primarily based on an understanding of physics?
    6·1 answer
  • What is the change in the cell voltage when the ion concentrations in the cathode half-cell are increased by a factor of 10?
    7·2 answers
  • En una barra de 6m que se utiliza como palanca se coloca el fulcro a 2 m de distancia del extremo derecho, como se muestra en la
    13·1 answer
  • A ball is projected at an angle of 53º. If the initial velocity is 48 meters/second, what is the vertical component of the veloc
    6·1 answer
  • 1
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!