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Paha777 [63]
3 years ago
13

Which best describes a value for density

Physics
1 answer:
scoray [572]3 years ago
8 0
Density can be any number, as long as it has the right units.

A unit of density has to be (a unit of mass) divided by (a unit of volume).
The most common one is gram/cm^3.
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a block measuring 20cm by 10cm by 5cm rests on a flat surface. The block has a weight of 3N. Determine the maximum pressure it e
Lady_Fox [76]
Max preassure = force / min area
= 3N / 0.1 x 0.05
= 600N/m(squared)
Copy off of the picture below itll help better, its what someone sent me when i asked this question

4 0
4 years ago
Q1) An average force of 50.0 N is exerted on a 4.0-kg cart for 2.0 seconds.
lozanna [386]
<h3>a. The impulse</h3>

The impulse is 100.0 Ns

The impulse I = Ft where

  • F =average force = 50.0 N and
  • t = time = 2.0 s

Substituting these values into the equation, we have

I = Ft

I = 50.0 N × 2.0 s

I = 100.0 Ns

The impulse is 100.0 Ns

<h3>b. Change in momentum</h3>

The change in momentum is 100 kgm/s

Since change in momentum Δp = I where I = impulse.

Since I = 100.0 Ns,

Substituting this into the equation, we have

Δp = I

= 100.0 Ns

= 100 kgm/s

The change in momentum is 100 kgm/s

<h3>c. Mass's change in velocity</h3>

The change in velocity is 25.0 m/s

Since change in momentum Δp = mΔv where

  • m = mass = 4.0 kg and
  • Δv = change in velocity.

Making Δv subject of the formula, we have

Δv = Δp/m

Substituting the values of the variables into the equation, we have

Δv = Δp/m

Δv = 100.0 kgm/s/4.0 kg

Δv = 25.0 m/s

The change in velocity is 25.0 m/s

Learn more about impulse here:

brainly.com/question/25700778

3 0
3 years ago
A ferris wheel with radius 12 m makes a revolution every 3 minutes. Find the linear (tangental) speed of a passenger. How far do
Alina [70]

Answer:

The linear (tangential) speed of a passenger is 0.4188 m/s

The distance traveled by the person in 5 minutes ride is 125.64 m

Explanation:

Given;

radius of the Ferris, r = 12 m

1 revolution per 3 minutes, \omega = \frac{2\pi (radian)}{3\ (minutes)} *\frac{1\ minute}{60 \ seconds} = 0.0349 \ rad/s

The linear (tangential) speed of a passenger is given by;

v = ωr

v = (0.0349)(12)

v = 0.4188 m/s

The distance traveled by the person in 5 minutes ride is given by;

d = vt

d = (0.4188)(5 x 60)

d = 125.64 m

3 0
3 years ago
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. The throw is m
Anit [1.1K]
 <span>(a) 

Taking the angle of the pitch, 37.5°, and the particle's initial velocity, 18.0 ms^-1, we get: 

18.0*cos37.5 = v_x = 14.28 ms^-1, the projectile's horizontal component. 

(b) 
To much the same end do we derive the vertical component: 

18.0*sin37.5 = v_y = 10.96 ms^-1 

Which we then divide by acceleration, a_y, to derive the time till maximal displacement, 

10.96/9.8 = 1.12 s 

Finally, doubling this value should yield the particle's total time with r_y > 0 

<span>2.24 s

I hope my answer has come to your help. Thank you for posting your question here in Brainly.
</span></span>
6 0
3 years ago
What are some of the major pieces of evidence for the theory of plate tectonics? How does the theory explain these observations?
marta [7]

Answer:

evidence:

- fossils found in different parts of the world were the same

- weather patterns in different parts of the world

- mountain ranged with the same rock types, structures, and ages are now on opposite sides of the atlantic ocean

- coal was found in cold climates where it could not have formed

-scratches from glaciers were found in a desert

- continents fit like a puzzle

- identical rocks of the same type and age found on both sides of the atlantic ocean

3 0
3 years ago
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