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
olya-2409 [2.1K]
3 years ago
13

A parachuter, falling with a constant speed, drops 456m in 14.4s.

Physics
1 answer:
monitta3 years ago
3 0

Answer:

The parachuter is falling at a speed of 31.667 meters per second.

Explanation:

Given that parachuter falls at constant speed and travelled distance and time are known, the unknown is speed, measured in meters per second, which is obtained by the following kinematic expression:

s = \frac{d}{t}

Where:

d - Travelled distance, measured in meters.

t - Time, measured in seconds.

If d = 456\,m and t = 14.4\,s, the speed of the parachuter is:

s = \frac{456\,m}{14.4\,s}

s = 31.667\,\frac{m}{s}

The parachuter is falling at a speed of 31.667 meters per second.

You might be interested in
What is the mass of modelling clay?​
Maurinko [17]

the mass of modelling clay is 500g

6 0
3 years ago
Read 2 more answers
If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10-19
Nata [24]

Answer:

So speed of electron will be 5.89\times 10^{-7}m/sec

Explanation:

We have given potential difference V = 9.9 KV

Charge on electron e=1.6\times 10^{-19}

So energy of electron E=eV=1.6\times 10^{-19}\times 9.9\times 10^3=15.84\times 10^{-16}J

This energy of electron will be equal to kinetic energy of electron

So \frac{1}{2}mv^2=15.84\times 10^{-16}J

\frac{1}{2}\times 9.11\times 10^{-31}v^2=15.84\times 10^{-16}

v=5.89\times 10^{-7}m/sec

So speed of electron will be 5.89\times 10^{-7}m/sec

8 0
3 years ago
Describe what happens when divergent plates move away from each other
fenix001 [56]

Answer:

they break

Explanation:

6 0
3 years ago
A wire of resistance R is cut into ten equal parts which are then connected in parallel. The equivalent resistance of the combin
Greeley [361]

Answer:

<em>The equivalent resistance of the combination is R/100</em>

Explanation:

<u>Electric Resistance</u>

The electric resistance of a wire is directly proportional to its length. If a wire of resistance R is cut into 10 equal parts, then each part has a resistance of R/10.

Parallel connection of resistances: If R1, R2, R3,...., Rn are connected in parallel, the equivalent resistance is calculated as follows:

\displaystyle \frac{1}{R_e}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+...+\frac{1}{R_n}

If we have 10 wires of resistance R/10 each and connect them in parallel, the equivalent resistance is:

\displaystyle \frac{1}{R_e}=\frac{1}{R/10}+\frac{1}{R/10}+\frac{1}{R/10}...+\frac{1}{R/10}

This sum is repeated 10 times. Operating each term:

\displaystyle \frac{1}{R_e}=\frac{10}{R}+\frac{10}{R}+\frac{10}{R}+...+\frac{10}{R}

All the terms have the same denominator, thus:

\displaystyle \frac{1}{R_e}=10\frac{10}{R}=\frac{100}{R}

Taking the reciprocals:

R_e=R/100

The equivalent resistance of the combination is R/100

6 0
3 years ago
there are two types of waves: electromagnetic and mechanical. can either type travel regardless of the presence of a medium?
Dmitry_Shevchenko [17]

Yes, electromagnetic can travel without medium.

Mechanical waves and electromagnetic waves are two important ways that energy is transported in the world around us.

Waves in water and sound waves in air are two examples of mechanical waves.

Mechanical waves are caused by a disturbance or vibration in matter, whether solid, gas, liquid, or plasma.

Matter that waves are traveling through is called a medium.

These mechanical waves travel through a medium by causing the molecules to bump into each other, like falling dominoes transferring energy from one to the next.

Sound waves cannot travel in the vacuum of space because there is no medium to transmit these mechanical waves.

On the other hand electromagnetic waves don't require medium for its propagation.

An easy example would be light which is an EM wave reaches earth even though space has no medium.

Learn more about different types of waves here:

brainly.com/question/13364787

#SPJ4

3 0
2 years ago
Other questions:
  • A wave front has the form of a
    8·1 answer
  • In the equation for the gravitational force between two objects, what does G represent? the gravitational constant the gravitati
    8·2 answers
  • The amount of heat energy required to raise the temperature of a unit mass of a material one degree is: A. absolute zero. B. a J
    7·1 answer
  • Two very flat, metallic plates separated a distance d have a potential difference of 600 Volts between them as shown below. A pr
    10·1 answer
  • If you are asked to determine an object’s speed, what information must you have? A. distance and period of time B. distance and
    9·2 answers
  • The drawing shows an adiabatically isolated cylinder that is divided initially into two identical parts by an adiabatic partitio
    8·1 answer
  • PLEASE HELP!!!<br>How are middle latitude cyclones and tropical cyclones different from each other?
    8·1 answer
  • What happen to the frequency of transverse vibration of a stretched string if its tension is halved and the area of cross sectio
    13·1 answer
  • t is the estimated distance traveled through the air by a marshmallow that is launched from a 15- cm long launcher when it is pl
    8·1 answer
  • When a cyclist moves downhill without pedalling, what type of energy does he gain?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!