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
Lady bird [3.3K]
3 years ago
12

Water from a fire hose is directed horizontally against a wall at a rate of 50.0 kg/s and aspeed of 42.0 m/s. Calculate the forc

e exerted on the wall, assuming the water’s horizontalmomentum is reduced to zero.
Physics
2 answers:
xxMikexx [17]3 years ago
6 0

Answer:

Explanation:

initial velocity, u = 42 m/s

mass per unit time, m = 50 kg/s

final velocity, v = 0

Force is equal to the rate of change of momentum

F = m ( v - u) / t

F = 50 x 42 = 2100 N

Ghella [55]3 years ago
4 0

Answer:

magnitude of the force exerted on the wall is 2100 N.

Explanation:

given data

rate = 50.0 kg/s

speed = 42.0 m/s

solution

momentum is reduced = zero

so final speed v = 0

so relation between the force and the momentum is express as

Force =  \dfrac{p}{t}    ...............1

Force = \dfrac{mv}{t}    

put here value and we get

Force = 50 \times 42  

Force = 2100 N

so that magnitude of the force exerted on the wall is 2100 N.

You might be interested in
A uniform electric field is directed parallel to the +y axis. If a positive test charge begins at the origin and moves upward al
lukranit [14]

Answer: option 1 : the electric potential will decrease with an increase in y

Explanation: The electric potential (V) is related to distance (in this case y) by the formulae below

V = kq/y

Where k = 1/4πε0

Where V = electric potential,

k = electric constant = 9×10^9,

y = distance of potential relative to a reference point, ε0 = permittivity of free space

q = magnitude of electronic charge = 1.609×10^-19 c

From the formulae, we can see that q and k are constants, only potential (V) and distance (y) are variables.

We have that

V = k/y

We see the potential(V) is inversely proportional to distance (y).

This implies that an increase in distance results to a decreasing potential and a decrease in distance results to an increase in potential.

This fact makes option 1 the correct answer

3 0
3 years ago
What is the frequency of an event?
konstantin123 [22]

"Frequency" just means "often-ness" ... how often something happens.
It's always expressed as

        <em>(number of happenings) / (some period of time) .</em>


4 0
3 years ago
Read 2 more answers
What occurs along a convergent plate boundary?
leonid [27]
So first things first its c. because when two plates collide it causes a earthquake so u can rule those out  and of course no not volcano so that's it u only have c left as  your answer choice.
:/
7 0
3 years ago
Read 2 more answers
Plants absorb water from the soil through their roots. _______ of this water is used for photosynthesis; _______ of this water e
netineya [11]
THE CORRECT CHOICE IS B
3 0
3 years ago
Read 2 more answers
1. Explain who is doing more work and why: a bricklayer carrying bricks and placing them on the wallof a building being
Basile [38]
Both are doing because they have chorus
7 0
2 years ago
Other questions:
  • Which is true about inelastic collisions: a. An inelastic collision does not obey conservation of energy. b. An inelastic collis
    8·1 answer
  • A train car has a mass of 10,000 kg and is moving at +3.0 m/s. It strikes an identical train car that is at rest. The train cars
    9·1 answer
  • Some plants disperse their seeds when the fruit splits and contracts, propelling the seeds through the air. The trajectory of th
    14·2 answers
  • Can someone help me with this question?¿
    12·1 answer
  • Intervals of paleomagnetic ___________ is/are characterized by the alignment of the magnetic south pole and the geographic north
    5·1 answer
  • A runner accelerates to 4.2 m/s2 for 10 seconds before winning the race. How far did he/she run?
    10·2 answers
  • The Sun orbits the center of the Galaxy in 225 million years at a distance of 26,000 lightyears. Given that a^3 = (M1 +M2) x P^2
    7·1 answer
  • Find the horizontal and vertical components of a projectile that is fired with a velocity of 50m/s at 30 degrees relative to the
    13·1 answer
  • How can you use PE in music class and how can you use music in PE class?
    11·1 answer
  • A truck with a mass of 5000 kg and transfers 800,000 newtons(N) of force when it hits a wall. What was the acceleration of the t
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!