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
Lisa [10]
3 years ago
6

Greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5 mph. which best describes the measured

number? it is the average speed of the bike rider. it is the instantaneous speed of the bike rider. it is the instantaneous velocity of the bike rider. it is the average velocity of the bike rider.
Physics
2 answers:
mr_godi [17]3 years ago
8 0

Answer:

it is the instantaneous speed of the bike rider.

Explanation:

First of all, let's remind the difference between speed and velocity:

- speed is a scalar, and it is the ratio between the distance covered and the time taken:

v=\frac{d}{t}

- velocity is a vector, which consists of a magnitude (the speed) and a direction as well.

The term 'instantaneous' means that the speed (or velocity) is measured at one precise instant of time, while the term 'average' means it is measured over a longer time period.

Based on all these definitions above, we can conclude that the correct answer is

it is the instantaneous speed of the bike rider.

Because in this problem, only the speed is given (no direction), so this is not a velocity, and also it is measured at one precise instant of time, so it is an instantaneous speed.

posledela3 years ago
3 0
The instantaneous speed. 
You might be interested in
A cyclist travels 1850 m north and then 1200 m south. Find both the distance it has traveled and the magnitude of its displaceme
finlep [7]

Answer:

The distance it has traveled is 3,050 m and the magnitude of its displacement is 650 m north.

Explanation:

Distance refers to the length between any two points in space, while displacement refers to the distance from a start position to an end position regardless of the path.

In other words, distance refers to how much space an object travels during its movement; is the quantity moved. It is also said to be the sum of the distances traveled. The distance traveled by a mobile is the length of its trajectory and it is a scalar quantity. In this case, the distance is calculated as:

1850 m + 1200 m= 3,050 m

Displacement refers to the distance and direction of the final position from the initial position of an object. The displacement effected is a vector quantity. The vector representing the displacement has its origin in the initial position, its end in the final position, and its module is the distance in a straight line between the initial and final positions. That is, when expressing the displacement it is done in terms of the magnitude with its respective unit of measurement and the direction because the displacement is a vector type quantity. Mathematically, the displacement (Δd) is calculated as:

Δd= df - di

where df is the final position and di is the initial position of the object.

In this case, the displacement is calculated as:

1850 m - 1200 m= 650 m

Since the distance to the north is greater, the direction of travel will be to the north.

<u><em>The distance it has traveled is 3,050 m and the magnitude of its displacement is 650 m north.</em></u>

6 0
2 years ago
Which satellite has the greatest gravitational force with Earth?
EastWind [94]

Answer:

Satellite D has a mass (kg) of 500 and the distance from Earth (km) is 320.

Explanation:

The universal law of gravitation states that the force between two objects in the universe is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

We have to choose the satellite having greatest gravitational force with earth. In all options the distance from the earth is same i.e. 320 km. So, we have to select the satellite having maximum mass because the mass of the earth is constant.

Hence, the correct option is (D) " Satellite D has a mass (kg) of 500 and the distance from Earth (km) is 320 ".

5 0
3 years ago
Read 2 more answers
Calculate the approximate volume of a uranium nucleus, 23592u. (you can ignore the mass defect in this calculation and simply ta
tester [92]

Radius of nuclei is given by formula

R = R_oA^{1/3}

now we can say volume of the nuclei is given as

V = \frac{4}{3}\pi R_o^3* A

now the density is given as

density = mass / volume

mass of nuclei = mass of neutron + mass of protons

m = z*m_p + (A- z)*m_n

m_p = m_n = 1.008u

m = A*1.008u

Now density is given as

\rho = \frac{A*1.008u}{\frac{4}{3}\pi R_0^3* A}

here we know that

R_0 = 1.2 fm

\rho = \frac{1.008u}{\frac{4}{3}\pi*(1.2*10^{-15})^3}

\rho = 2.31 * 10^{17} kg/m^3

So from above we can say that density of all nuclei is almost same.

5 0
3 years ago
Help me with this please
creativ13 [48]

Answer:

i dont understand, can you put it in word form please.

Explanation:

4 0
2 years ago
Weight gain occurs when a person consumes too muchimany
MAVERICK [17]
The answer is calories !!
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which is harder, air tight or water tight seals?
    11·1 answer
  • A physical pendulum in the form of a planar object moves in simple harmonic motion with a frequency of 0.290 Hz. The pendulum ha
    9·1 answer
  • Which particle of the atom has a negative charge?
    7·2 answers
  • You hold a ruler that has a charge on its tip 6 cm above a small piece of tissue paper to see if it can be picked up. The ruler
    13·1 answer
  • A rifle with a mass of 0.9 kg fires a bullet with a mass of 6.0 g (0.006 kg). The bullet moves with a muzzle velocity of 750 m/s
    10·1 answer
  • You are building a uniform to protect workers from all types of nuclear radiation. If you use material that blocks _____ radiati
    5·1 answer
  • Whats the definition of deposition​
    15·2 answers
  • You are trying to gain possession of the soccer ball. What position are you playing?
    7·1 answer
  • Jill is pushing a box across the floor. Which represents the upward force perpendicular to the floor?
    10·1 answer
  • David and Fiona want to know about how mass affects the motion of an object. David uses three objects with masses of 2 kg, 3 kg,
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!