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
NemiM [27]
3 years ago
6

A person jogs eight complete laps around a quarter-mile track in a total time of 13.1 minutes

Physics
1 answer:
ExtremeBDS [4]3 years ago
5 0
Speed and velocity have the same magnitudes. The only difference is that speed is a scalar quantity and velocity is a vector quantity. In other words, speed is just a magnitude, while velocity is a magnitude with direction. They're essentially the same.

Let's convert miles to meters and minutes to seconds

1/4 mile = 402.34 meters ( 1 mile = 1609 m)
13.1 minutes = 786 seconds (1 minute = 60 seconds)

Speed is calculated as distance over time, thus,

Speed = (402.34 meters)*8/786 seconds
a.) Speed = 4.1 m./s
b.) Velocity = 4.1 m/s

You might be interested in
What is the total energy equation?
netineya [11]
The total energy equation would be Kinetic energy+Potential energy
6 0
3 years ago
A singly charged positive ion has a mass of 3.46 × 10−26 kg. After being accelerated through a potential difference of 215 V the
jasenka [17]

Answer:

1.8 cm

Explanation:

m = mass of the singly charged positive ion = 3.46 x 10⁻²⁶ kg

q = charge on the singly charged positive ion = 1.6 x 10⁻¹⁹ C

\Delta V =Potential difference through which the ion is accelerated = 215 V

v = Speed of the ion

Using conservation of energy

Kinetic energy gained by ion = Electric potential energy lost

(0.5) m v^{2} = q \Delta V\\(0.5) (3.46\times10^{-26}) v^{2} = (1.6\times10^{-19}) (215)\\(1.73\times10^{-26}) v^{2} = 344\times10^{-19}\\v = 4.5\times10^{4} ms^{-1}

r = Radius of the path followed by ion

B = Magnitude of magnetic field = 0.522 T

the magnetic force on the ion provides the necessary centripetal force, hence

qvB = \frac{mv^{2} }{r} \\qB = \frac{mv}{r}\\r =\frac{mv}{qB}\\r =\frac{(3.46\times10^{-26})(4.5\times10^{4})}{(1.6\times10^{-19})(0.522)}\\r = 0.018 m \\r = 1.8 cm

5 0
2 years ago
______ is the best way to determine your own correct intensity level.
scZoUnD [109]
<span>Self-monitoring would be the best way to </span><span>determine your own correct intensity level. I hope this helps! <3
</span>
5 0
3 years ago
If the plotted points on a speed-time graph do not form a straight line, what do you know about the object's acceleration?
slega [8]
Remember, that while sped is constant, acceleration is not. Acceleration is when velicity changes. So the graph which shows the slop <span>of a velocity vs time describes acceleration.
</span>If we have the straight line on the graph it means that the slope is always the same whereas the <span>non-linear graphs has a variable slope that changes depending on your point in the graph.
</span>To conclude - if your graph is not a straight line it has variable acc at many points.<span>

</span>
6 0
2 years ago
Read 2 more answers
During the 28-day lunar cycle, the positions of the Sun,
Mnenie [13.5K]
The answer is full moon because that’s how it changes in life
8 0
3 years ago
Other questions:
  • Canola oil is less dense than water, so it floats on water, but its index of refraction is 1.47, higher than that of water. When
    7·1 answer
  • What happens to the heat energy the particles receive during convection and conduction?
    10·1 answer
  • An example of a single displacement reaction is
    11·2 answers
  • Which statement is true according to Newton's first law of motion?
    15·2 answers
  • All life on earth exists in a region known as
    14·1 answer
  • Two particles, each of mass m, are initially at rest very far apart.Obtain an expression for their relative speed of approach at
    7·1 answer
  • When the saw slices wood, the wood exerts a 104-N force on the blade, 0.128 m from the blade’s axis of rotation. If that force i
    12·1 answer
  • Between any object and surface, the coefficient of static friction is _____ the coefficient of kinetic friction.
    14·1 answer
  • Charges q and Q are placed on the x axis at x = 0 and x = 2.0m, respectively. If q= -40 pC and Q =+30 pC, determine the net flux
    7·2 answers
  • An ideal monatomic gas at temperature T is held in a container. If the gas is compressed isothermally, that is at constant tempe
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!