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
Naddika [18.5K]
3 years ago
8

I don’t know if these are correct please help Will mark brainliest :)

Physics
1 answer:
miv72 [106K]3 years ago
5 0

<>"Topographic maps conventionally show topography, or land contours, by means of contour lines. Contour lines are curves that connect contiguous points of the same altitude (isohypse). In other words, every point on the marked line of 100 m elevation is 100 m above mean sea level."<> I hope this helps.

You might be interested in
A car traveling at 90 m/s can stop in a distance of 110 m. What is the magnitude of the cars acceleration as it slows down?
mafiozo [28]

I think I have already answer this question. Anyways please do let me know whether it is useful or not

7 0
3 years ago
Help please!
weeeeeb [17]

Answer:

m=1000kg

v=72km/h=20m/s

Work = different of kinetic energy

W= ½ mv ²

W= ½ ×1000×20×20= 400000J

also written as 4×10^5 J

thank you

5 0
2 years ago
Two wave pulses pass each other on a string. The pulse traveling toward the right has positive amplitude, whereas the pulse trav
GalinKa [24]

Answer:

destructive interference occurs

5 0
3 years ago
Jumping up before the elevator hits. After the cable snaps and the safety system fails, an elevator cab free-falls from a height
butalik [34]

Answer:

a) I = -2257.6 Kg*m/s

b) F = -451,520N

Explanation:

part a.

we know that:

I = P_f-P_i

where I is the impulse, P_f the final momentum and P_i the initial momentum.

so:

I = MV_f-MV_i

where M is the mass, V_f the final velocity and V_i the initial velocity.

Therefore, we have to find the initial velocity or the velocity of the passenger just before the collition.

now, we will use the law of the conservation of energy:

E_i=E_f

so:

mgh = \frac{1}{2}MV_i^2

where g is the gravity and h the altitude. So, replacing values, we get:

(85kg)(9.8m/s^2)(36m)= \frac{1}{2}(85kg)V_i^2

solving for V_i:

V_i = 26.56m/s

Then, replacing in the initial equation:

I = MV_f-MV_i

I = (85kg)(0m/s)-(85kg)(26.56m/s)

I = -2257.6 Kg*m/s

Then, the impulse is -2257.6 Kg*m/s, it is negative because it is upwards.

part b.

we know that:

Ft = I

where F is the average force, t is the time and I is the impulse. So, replacing values, we get:

F(0,005s) = -2257.6 Kg*m/s

solving for F:

F = -451520N

Finally, the force is -451,520N, it is negative because it is upwards.

3 0
3 years ago
A ball of mass is released from rest at a height of 30 how fast is it going when it hits the ground
elena55 [62]

Answer:

If the height is in metres, the speed is 24.25m/s

7 0
3 years ago
Other questions:
  • Which of the following is a CHEMICAL factor affecting marine biomes?
    13·1 answer
  • Please help me!!!!!!!
    15·1 answer
  • Which best describes a reference frame?
    8·2 answers
  • Suppose a moving object has a kinetic energy of 100 J. What will the object's kinetic
    9·1 answer
  • Which of the following will cause an increase in gas pressure in a closed container?
    5·1 answer
  • When two plates of the same density collide, what will most likely happen?
    7·1 answer
  • How are the terms atom and element related
    15·2 answers
  • A 1000 watt microwave oven takes 90 seconds to heat a bowl of soup. How many joules of energy does it use?
    10·1 answer
  • What formula can you use to calculate average speed
    10·1 answer
  • What is the resistance of an electric frying pan that draws 12 amperes of current when connected to 120 Volt circuit
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!