2 years ago

Which of the following leads to new discoveries and new theories?

Physics

2 answers:

snow_tiger [21]2 years ago

4 0

Answer:

The right anwser is Scientific knowledge

Explanation:

I TOOK THE TEST AND GOT IT RIGHT!!! :))))

Fynjy0 [20]2 years ago

3 0

)scientific knowledge

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!! 50 points spent, easy points for you. 8th-grade science/physics !!

luda_lava [24]

Answer:

1.mirage

2.lens

3.concave lens

4.convex lens

5.index of refraction

Explanation:

IQ=999999

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2 years ago

A 12 kg object speeds up from an initial velocity of 10 m:s-1

amid [387]

Momentum = m • v

Original momentum = m • 10 m/s north

Final momentum = m • 15 m/s north

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3 years ago

How much power does it take to do 500J of work in 10 sec

tatuchka [14]

P=w/t
so the answer is 500/10=50

8 0

2 years ago

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A 50 kg crate is pulled across the ice by a rope that is angled at 30 degrees above the horizontal. If the tension in the rope i

denpristay [2]

Let:
Vx = the pulling component of force
Vy = the lifting component of force

Vy:
Sin(n°) = Vy/hypotenuse
hypotenuse * Sin(n°) = Vy
100N*sin(30°) = Vy
50N = Vy

Vx:
Cos(n°) = Vx/hypotenuse
Hypotenuse * cos(n°) = Vx
100N*cos(30°) =Vx
about 86.6N = Vx

4 0

3 years ago

Assume that the force of a bow on an arrow behaves like the spring force. In aiming the arrow, an archer pulls the drawstring ba

Alex

Answer:

v=39.05 m/s

Explanation:

Given that

x= 56 cm

F= 158 N

m= 58 g = 0.058 kg

Lets take spring constant = k

At the initial position,before releasing the arrow

F= k x

By putting the values

F= k x

158= 0.56 k

k=282.14 N/m

Now from energy conservation

Lets take final speed of the arrow after releasing

$\dfrac{1}{2}kx^2=\dfrac{1}{2}mv^2$

k x²=mv²

282.14 x 0.56² = 0.058 v²

v=39.05 m/s

3 0

3 years ago