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trapecia [35]
3 years ago
12

A force acting on an object does no work if…

Physics
1 answer:
OlgaM077 [116]3 years ago
3 0

Answer:

B. the object doesn't move.

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A car of weight 6,400 N has four wheels. Each wheel has an area of
Natasha2012 [34]

Answer:

80N/cm^2

Explanation:

Given data

A car of weight 6,400N

Area= 80cm^2

The weight is distributed evenly on the 4 wheels

hence 6400/4

=1600 N

We know that

Pressure = force/Area

Pressure= 1600/80

Pressure= 20 N/cm^2

For the four wheels, the pressure is

=20*4

=80N/cm^2

6 0
3 years ago
What is Young’s interference? (b) How should the number of observable interference fringes change as the distance between the tw
statuscvo [17]

Answer:

b) increase.

c) decrease.

d) Fringe is said to be a missing fringe  when interference maxima overlap with diffraction minima.

Explanation:

a ) Young's interference is the interference phenomenon related to the light waves. Interference  is the superposition of light waves . It proved the wave nature of light .  Interference can be either constructive or destructive.

b) If the distance between the two slits increases, the number of fringes also increases. d sinθ = m λ. Here d is the slit width and m is the order of fringes. It shows that as d increases, m also increases.

c) Similarly, as d decreases , number of fringes decrease.

d) Fringe is said to be a missing fringe  when interference maxima overlap with diffraction minima.

7 0
3 years ago
(1) A Newton is 1 kgm/s2 . Is this a fundamental unit or a derived unit?
Mrac [35]
A Newton is a derived unit.
Hope that helped:)
8 0
3 years ago
A scientific ___ must be testable and capable of being proven false
Bumek [7]
Hypothesis
A scientific hypothesis must be testable and capable of being proven false.
5 0
3 years ago
Read 2 more answers
Help asap<br> Polaris is 4.07 x 1015 km from Earth. Calculate the<br> distance in light years.
Shalnov [3]

Answer:

4 131.05 kilometers

Explanation:

You should know the rest!!!!!!!!!!!!!!!!!!!!!

4 0
2 years ago
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