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lana [24]
3 years ago
14

You make the following measurements of an object: 42kg and 22m³. What would the objects density be? Show all work please and the

final units.
Physics
1 answer:
Tresset [83]3 years ago
3 0
The formula for density is mass divided by volume
So 42kg divided by 22m3
= 1.909 kilogram/cubic meter
The object density would be 1.9
If you round it, the answer would be 1.91
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an object is held 33.5 cm from a convex mirror. it creates a virtual image of magnification 0.253. what is the focal length of t
MaRussiya [10]

Answer:

Magnification= -image distance/object distance

.253=image distance/33.5

image distance= 8.48 cm

7 0
2 years ago
A potter’s wheel of radius 17 cm starts from rest and rotates with constant angular acceleration until at the end of 32 s it is
dedylja [7]

Answer:

α=0.625rad/s^2

v=340m/s

w=10rad/s

θ=320rad

Explanation:

Constant angular acceleration = ∆w/∆t

angular acceleration = 20/32

α=0.625rad/s^2

Linear velocity v=wr

v = 20×17= 340m/s

Average angular velocity

w0+w1/2

w= 0+20/2

w= 20/2

w=10rad/s

What angle did it rotate with

θ=wt

θ= 10×32

=320rad

4 0
3 years ago
The diagram shows waves of sound travelling through the air. By which factor is the sound intensity decreased at 3 meters?
SIZIF [17.4K]
The diagram is missing; however, we know that the intensity of a sound wave is inversely proportional to the square of the distance from the source:
I(r)= \frac{1}{r^2}
where I is the intensity and r is the distance from the source.

We can assume for instance that the initial distance from the source is r=1 m, so that we put 
I= \frac{1}{r^2}= \frac{1}{(1)^2}=1
The intensity at r=3 m will be
I= \frac{1}{r^2}= \frac{1}{(3)^2}= \frac{1}{9}
Therefore, the sound intensity has decreased by a factor 1/9.
8 0
3 years ago
Read 2 more answers
What might happen if a person’s ear canal was blocked?
mylen [45]

Answer:

D. Sounds would be harder to hear.

Explanation:

if the ear canal is blocked then the sound waves cannot reach the ear drum thus we cannot hear clearly.

hope this helps please mark as brainliest:)

7 0
3 years ago
You drive your car 3 hrs at an average of 130 km how far did you go
Bingel [31]
You have traveled 390 km. In order to find your answer all you have to do is multiply your speed which is 130 km/h by 3 hrs. That's my friend is how you get your answer! Have a great day!
7 0
3 years ago
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