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3 years ago

What might cause a theory to change over time?

Physics

1 answer:

Olin [163]3 years ago

5 0

Answer:

A theory does not change into a scientific law with the accumulation of new or better evidence. A theory will always remain a theory

Explanation:

theories and laws could potentially be falsified by countervailing evidence. Theories and laws are also distinct from hypotheses.

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What is the wavelength

melamori03 [73]

The distance between two particles that are <em>in phase</em>

4 0

4 years ago

A planet follows an elliptical orbit that brings it as close as 21 million km to a star and as far as 75 million km from the sta

nexus9112 [7]

Answer:

Explanation:

In an elliptical orbit , the angular momentum of the planet remains constant because velocity of planet makes a right angle to the direction to the star .

mvr = constant .

mv₁r₁ = mv₂r₂

v₁r₁ = v₂r₂

v₁ x 21 = 38 x 75

v₁ = 135.71 km/s .

6 0

3 years ago

Based on the free-body diagram, the net force acting on this wheelbarrow is {blank} N.

Semenov [28]

Answer:

diagram?

Explanation:

5 0

3 years ago

Read 2 more answers

The planet Jupiter’s mean orbital radius is 5.2025 AU’s. what is the period of Jupiter in earth years?

Gre4nikov [31]

11.86 years, or around that time it would take about 12 years.

7 0

3 years ago

A batter hits a ball at 35 degrees above the horizontal and it is caught 4 seconds later 100 meters from home plate. What is the

Mamont248 [21]

Answer:

$u=(26.5 i + 18.5j) m/s$

Explanation:

The range of a projectile is given by the formula

$d=\frac{u^2}{g} sin 2\theta$

where in this case, we have

d = 100 m is the range

u is the initial speed (the magnitude of the initial velocity)

g = 9.8 m/s^2 is the acceleration of gravity

$\theta = 35^{\circ}$ is the angle of projection

Solving for u, we find:

$u=\sqrt{\frac{dg}{sin 2\theta}}=\sqrt{\frac{(100)(9.8)}{sin(2\cdot 35^{\circ})}}=32.3 m/s$

Now we can easily find the components of the initial velocity:

$u_x = u cos \theta = (32.3)(cos 35^{\circ})=26.5 m/s\\u_y = u sin \theta = (32.3)(sin 35^{\circ})=18.5 m/s$

So, the initial velocity of the ball is

$u=(26.5 i + 18.5 j) m/s$

where i and j are the unit vector indicating the horizontal and vertical direction.

7 0

3 years ago