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Eddi Din [679]
3 years ago
11

In science, a hypothesis must be true. Please select the best answer from the choices provided True or False

Physics
2 answers:
hodyreva [135]3 years ago
5 0

Answer:

False

Explanation:

In science, Hypothesis  is not an established theory it is just a supposition. It is not necessary that a hypothesis must be true because it is an assumption or an idea which is always tested with an experiment. After carrying out an experiment it can be determined whether the hypothesis is true or false.

Example:

De-Broglie Hypothesis:

De-Broglie gave an hypothesis that light is not a wave nor it posses particle nature but it posses duel nature. According to De-Broglie hypothesis with each moving particle a wave is associated.

But after experiment it is found that with each moving particle a single wave is not associated but a group of wave is associated.

In this way we can say that hypothesis is not always true.

butalik [34]3 years ago
4 0

That's false.  A hypothesis may be accurate or full of beans.  That's why you do experiments, to test it.

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How are theories and laws connected ​
Anni [7]

Answer:

Laws are statements about something that's been observed and stated while a theory is an explanation of what's been observed. This connection between them forms a main idea that many people regulate as "what's normal."

Explanation:

4 0
2 years ago
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A tow truck exerts a net horizontal force of 1050 N on a 760-kg car. What is the acceleration of the car during this time?
vovikov84 [41]
We can solve the problem by using Newton's second law of motion:
F=ma
where
F is the net force applied to the object
m is the object's mass
a is the acceleration of the object

In this problem, the force applied to the car is F=1050 N, while the mass of the car is m=760 kg. Therefore, we can rearrange the equation and put these numbers in, in order to find the acceleration of the car:
a= \frac{F}{m}= \frac{1050 N}{760 kg}=1.4 m/s^2

The equation also tells us that the acceleration and the force have same directions: therefore, since the force exerted on the car is horizontal, the correct answer is
<span>B) 1.4 m/s2 horizontally.</span>
5 0
3 years ago
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Finger [1]

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4 0
3 years ago
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The magnetic field produced by a long straight current-carrying wire is
alexdok [17]

Answer:

proportional to the current in the wire and inversely proportional to the distance from the wire.

Explanation:

The magnetic field produced by a long, straight current-carrying wire is given by:

B=\frac{\mu_0 I}{2 \pi r}

where

\mu_0 is the vacuum permeability

I is the current intensity in the wire

r is the distance from the wire

From the formula, we notice that:

- The magnitude of the magnetic field is directly proportional to I, the current

- The magnitude of the magnetic field is inversely proportional to the distance from the wire, r

Therefore, correct option is

proportional to the current in the wire and inversely proportional to the distance from the wire.

8 0
3 years ago
A 500-kilogram sports car accelerates uni-
timama [110]

Answer:

90 meters

Explanation:

Given:

x₀ = 0 m

v₀ = 0 m/s

v = 30 m/s

t = 6 s

Find:

x

x = x₀ + ½ (v + v₀)t

x = 0 + ½ (30 + 0)(6)

x = 90

The car travels 90 meters.

3 0
3 years ago
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