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
jeka57 [31]
2 years ago
11

Pls someone help with number 3

Physics
1 answer:
mars1129 [50]2 years ago
7 0
Rocket thrust equation
= ( mass flow rate of fuel burnt ) X (Velocity of gas ejected ) + ( Exit Pressure - Outdoor Pressure ) X ( Area of exhaust )

In this case, we can assume the exit pressure = outdoor pressure and since area of exhaust is not given, it can be assumed to be negligible.

In this case, by Newton 3rd’s law,

Force exerted by gas on rocket
= Force exerted by rocket on gas
= (10kg/s) X (5 x 10^3 m/s)
= 5 x 10^4 N
You might be interested in
Which piece of evidence did Alfred Wegener use to develop the theory of continental drift?
Eduardwww [97]
The right answer for the question that is being asked and shown above is that: "A.tectonic activity concentrated in certain areas." A piece of evidence did Alfred Wegener use to develop the theory of continental drift is that <span>A.tectonic activity concentrated in certain areas</span>
3 0
3 years ago
Q 36 - URGENT HELP PLS<br> WILL BE MARKED AS BRAINLIEST.
Sliva [168]
The answer is B.

This is because you add up all of the times (1.44s+1.70s+1.58s+1.76s) and you get 6.48 then you divide 6.48 by 4 to get the average of the times. Now you get the distance (200m) and because speed=distance/time you divide 200m/1.62s to get 123m/s. I hope this made sense :)
5 0
2 years ago
A sailboat weighing 980 lb with its occupants is running downwind at 8 mi/h when its spinnaker is raised to increase its speed.
Effectus [21]

Answer:

78.498N

Explanation:

The Net force provided by the spinnaker can be obtained from Newton's second law of motion as follows;

F=\frac{m(v-u)}{t}................(1)

where m is the mass, v is the final velocity, u is the initial velocity and t is the time interval for which the force acted.

Given;

m =980lb

v = 12mi/h

u =8mi/hr

t = 10s.

It is important to convert all quantities to their SI units where necessary, so we do that as follows;

1lb = 0.45kg,

hence 980lb = 980 x 0.45kg = 441kg.

1mile = 1609.34m

1hour = 3600s,

therefore;

8mi/h=\frac{8*1609.34m}{3600s}=3.58m/s

12mi/h=\frac{12*1609.34m}{3600s}=5.36m/s

Substituting all values into equation (1), we obtain the following;

F=\frac{441(5.36-3.58)}{10}\\F=\frac{441*1.78}{10}\\F=\frac{784.98}{10}\\F=78.498N

4 0
3 years ago
What is the direction of the magnetic field around a wire carrying a current perpendicularly into this page
UNO [17]

Answer:

Clockwise direction

Explanation:

In a case of a wire carrying a current, the right hand rule is used.

The thumb in the direction of current while the finger curl around in the direction of the magnetic field.

The right hand rule applies to a current in a straight line wire.

If the direction a wire carrying a current perpendicularly into this page, the direction of the magnetic field will be in a clockwise direction .

3 0
3 years ago
How do you identify the number of protons in an atom's nucleus from the periodic<br> table?
hodyreva [135]

Answer:

Explanation: BY ATOMIC NUMBER

6 0
2 years ago
Other questions:
  • What is the momentum of an object that is traveling at 3 m/s and has a mass of 5 kg?
    5·1 answer
  • Using a 1-kW heater for one hour consumes more energy than using a 100-W bulb for twenty-four hours. Please select the best answ
    15·1 answer
  • How many protons are in hydrogen -2
    6·1 answer
  • The volume of a gas is 200.0 mL at 275 K and 92.1 kPa. Find its volume at STP.
    5·1 answer
  • O lugar mais fundo do mar é a Trincheira de Mariana, localizada a 11 km de profundidade. Essa estrutura imensa está localizada n
    6·1 answer
  • The average velocity of an object over 6.0 seconds interval is 2 m/s what is the total distance traveled and M by the object doi
    15·1 answer
  • Please answer fast ————-
    15·1 answer
  • What are magnetic materials
    12·1 answer
  • How would you explain conduction?
    8·2 answers
  • The wavelength of the yellow light from a sodium flame is 589 nm. This light originated from a sodium atom in the hot flame.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!