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Luba_88 [7]
3 years ago
9

Please help!

Physics
1 answer:
julsineya [31]3 years ago
6 0

Answer:

Answer:

3 g/cm          

Explanation:

Mass of stone = 30 g

Initial volume of cylinder = 50 cm

Increased volume = 60 cm

Volume = 60-50

= 10 cm

Density of stone = Mass/Volume

= 30/10

= 3 g/ml            as 1 ml = 1 cm

= 3 g/ml          

Explanation:

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The velocity of a 0.25kg model rocket changes from 15m/s [up] to 40m/s [up] in
pochemuha

Since g is constant,  the force the escaping gas exerts on the rocket will be 10.4 N

<h3>What is Escape Velocity ?</h3>

This is the minimum velocity required for an object to just escape the gravitational influence of an astronomical body.

Given that the velocity of a 0.25kg model rocket changes from 15m/s [up] to 40m/s [up] in 0.60s. The gravitational field intensity is 9.8N/kg.

To calculate the force the escaping gas exerts of the rocket, let first highlight all the given parameters

  • Mass (m) of the rocket 0.25 Kg
  • Initial velocity u = 15 m/s
  • Final Velocity v = 40 m/s
  • Time t = 0.6s
  • Gravitational field intensity g = 9.8N/kg

The force the gas exerts of the rocket = The force on the rocket

The rate change in momentum of the rocket = force applied

F = ma

F = m(v - u)/t

F = 0.25 x (40 - 15)/0.6

F = 0.25 x 41.667

F = 10.42 N

Since g is constant,  the force the escaping gas exerts on the rocket is therefore 10.4 N approximately.

Learn more about Escape Velocity here: brainly.com/question/13726115

#SPJ1

7 0
2 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Basile [38]
<h3><u>Answer;</u></h3>

Electromagnetic and transverse

<h3><u>Explanation</u>;</h3>
  • Electromagnetic waves are types of waves which do not require material medium for transmission.
  • Transverse waves are waves in which the vibration of particles is perpendicular to the direction of wave motion.
  • All electromagnetic waves are transverse waves and travels with the speed of light. They include; gamma rays, x-rays, UV light, radio waves, and microwaves among others.

5 0
3 years ago
A runner with a mass of 60kg accelerates at 2.2m/s2. What is the runner’s net force?
abruzzese [7]
As we know that, f=ma where
f= net force
m=mass of body
a=acceleration
Substitute m and a in the formula and you will get the answer
3 0
3 years ago
A (light) pallet has a load of cases of tomato paste each of which is a cube of length L and has identical mass. Find the center
Dafna1 [17]

Answer:

From left = 1.2L

From back = 0.9L

Explanation:

5 x = 3(L-X) + 2(2L-X)

X = 0.7L

Distance from left = 1.2L

7y = 2(L-X)+1(2L-x)

Y = 0.4L

Distance from back = 0.9L

6 0
3 years ago
How long will it take a person walking at 3.2 m/s to travel 16 m? *
BigorU [14]

Answer:

speed=distance/time

time=distance/speed

time=16/3.2

time=5 seconds

time will take 5 seconds

3 0
3 years ago
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