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
Jlenok [28]
3 years ago
6

calculate the force exerted on a rocket given that the propelling gases are expelled at a rate of 1500 kg/s with a speed of 4.0x

10^4 (at the moment of take off)
Physics
1 answer:
Tanya [424]3 years ago
3 0

we know that momentum is given as

P = mv

where P = momentum , m = mass , v = velocity

taking derivative both side relative to "t"

dP/dt = v (dm/dt)

we know that :  dP/dt  = F = force

hence

F = v (dm/dt)

given that :

dm/dt = rate of mass expelled = 1500 kg/s

v = velocity = 4 x 10⁴ m/s

hence  , inserting the values in the above formula

F = (4 x 10⁴) (1500)

F = 6 x 10⁷ N



You might be interested in
If 20 beats are produced within a single second, which of the following frequencies could possibly be held by two sound waves tr
zhuklara [117]

The correct choice is

D. 22 Hz and 42 Hz.

In fact, the beat frequency is given by the difference between the frequencies of the two waves:

f_B = |f_1 -f_2|

In this problem, the beat frequency is f_B=20 Hz, therefore the only pair of frequencies that gives a difference equal to 20 Hz is

D. 22 Hz and 42 Hz.

4 0
3 years ago
Read 2 more answers
Kim’s experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added.
astraxan [27]

The step of this scientific method is "draw conclusion".

<h3>What is scientific method?</h3>

The scientific method is the process of objectively establishing facts through testing and experimentation.

The basic scientific process or scientific method involves the following;

  • making an observation
  • forming a hypothesis
  • making a prediction
  • conducting an experiment
  • analyzing the results and
  • drawing conclusion.

Thus, if Kim’s experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added. The step of this scientific method is "draw conclusion".

Learn more about scientific method here: brainly.com/question/17216882

#SPJ1

6 0
2 years ago
The reason why the position of an electron cannot be measured with absolute precision is:
LenKa [72]
They are too small are never in the same place. Electrons are constantly moving in random motion within the electron cloud, making them impossible to follow.
5 0
3 years ago
An electric clothes dryer draws 15 A at 220 V. If the clothes put into the dryer have a mass of 7.0 kg
xz_007 [3.2K]

Answer:

Explanation:

7.0 - 4.0 = 3.0 kg water

3.0 kg(2.26 x 10⁶ J/kg = 6.78 x 10⁶ J

220 V(15 A) = 3300 W

1 W = 1 J/s

6.78 x 10⁶ J / 3300 J/s = 2054 s

2054 s / 60 s/min = 34 min

6 0
2 years ago
You lift a 25-kg child 0.80 m, slowly carry him 10 m to the playroom, and finally set him back down 0.80 m onto the playroom flo
maksim [4K]

To solve this problem we will apply the work theorem which is expressed as the force applied to displace a body. Considering that body strength is equivalent to weight, we will make the following considerations

\text{Mass of the child} = m = 25kg

\text{Acceleration due to gravity} = g = 9.81m/s^2

\text{Height lifted} = h = 0.80m (Upward)

Work done to upward the object

W = mgh

W = (25)(9.81)(0.8)

W = 196.2J

Horizontal Force applied while carrying 10m,

F = 0N

W = 0J

Height descended in setting the child down

h' = -0.8m (Downwoard)

W = mgh'

W = (25)(9.81)(-0.80)

W = -196.2J

For full time, assuming that the total value of work is always expressed in terms of its symbol, it would be zero, since at first it performs the same work that is later complemented in a negative way.

6 0
4 years ago
Other questions:
  • An airplane flies 21 km in 30 minutes. What is its average speed in kilometers per hour?
    10·2 answers
  • Which of the following is a likely life cycle of a star?
    13·1 answer
  • In a ballistics test, a 24 g bullet traveling horizontally at 1300 m/s goes through a 25-cm-thick 360 kg stationary target and e
    8·1 answer
  • Two bicycle tires are set rolling with the same initial speed of 4.00 m/s along a long, straight road, and the distance each tra
    10·1 answer
  • How much heat is necessary to change 350 g of ice at -20 degrees Celsius to water at 20 Celsius?
    9·1 answer
  • Sedimentary layers that are deposited on an angle are called?
    10·1 answer
  • Find preposition of the following lines
    9·1 answer
  • Un automovil transita por una curva en forma de U y recorre una distancia de 400m en 30s sin embargo su posición final está a so
    14·1 answer
  • Which of these can produce an electric current?Required to answer. Single choice.
    14·1 answer
  • Why doesn’t the total pressure increase when more gas is added to the chamber? (hint: what would you see if the volume of the ch
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!