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salantis [7]
3 years ago
11

Momentum of an object is determined to be 7.2 ×10 to the negative 3 kg

Physics
1 answer:
abruzzese [7]3 years ago
6 0
Answer:

0.0072

Explanation

7.2x10^-3= 0.0072
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Two cyclists, 50 miles apart, start riding toward each other at the same time. One cycles 4 times as fast as the other, and they
Bond [772]

Answer:speed of slower cyclist is 5 mph

Explanation:

Given

Distance between two cyclist is 50 miles

One cycle is 4 times fast as other

Speed of slower cyclist is r miles per hour

speed of faster cyclist is 4 r

they meet after t=2 hr

Distance traveled by fast cyclist is x=2\times 4r

Distance traveled by slower cyclist is y=2\times r

x+y=50

2\times 4r+2\times r=50

8r+2r=50

10r=50

r=5 mph

4 r=20 mph

speed of slower cyclist is 5 miles per hour

3 0
3 years ago
I need help with this answer I believe it's a democracy​
kipiarov [429]

Answer:

a. democracy

Explanation:

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8 0
2 years ago
Linear Velocity What is the linear velocity in cm>min for any edge point of a 12-cm-diameter CD (compact disc) spinning at 10
daser333 [38]

3,89,988 cm/min is the linear velocity

Given,

Diameter of CD = 12 cm

So, Radius of CD = 6 cm

CD is spinning at 10350 rev/min

Firstly , convert rev/min into rad/min

1 rev = 2π radians

10350 rev/min = 10350 × 2π

                        = 64998 rad/min

Formula used,

v=rw where,

v is the Linear velocity

r is the radius

w is the angular velocity

v = 6 cm × 64998rad/min

  = 3,89,988 cm/min

Thus, linear velocity for any edge point of a 12-cm-diameter CD (compact disc) spinning at 10,350 rev/min is 389988 cm/min.

Learn more about Angular speed here brainly.com/question/540174

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8 0
2 years ago
What unit can be used to measure the mass of a grain of salt
Anna007 [38]

milligrams

Explanation:

The best unit to measure the mass of a grain of salt is the milligram.

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  A grain of salt is a very small particle size that can still be visible with the eye.

It has a very low and small mass.

For substances like this, we use the milligram:

             1000milligram  = 1g

learn more:

Mass brainly.com/question/4736384

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5 0
3 years ago
Which is not a characteristic of a heat pump?
kramer
The answer is c. it requires no works
5 0
3 years ago
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