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4 years ago

What do we call the substances that react together (break/form chemical bonds) to form new substances?

Physics

2 answers:

Luda [366]4 years ago

3 0

Answer: A) reactants

Explanation:

Reactants are the substances that have chemical reactions when they are combined, whereas the product is what comes from the reactants’ chemical reactions.

bixtya [17]4 years ago

3 0

Answer:

A)reactants

Explanation:

I think the correct answer is reactants because the substances that go into a chemical reaction are called reactants.

Sorry if it's wrong:(

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What is the scientific law?

storchak [24]

Answer:

Explanation:

A scientific law is the statement which is based on the repeated experimental trials and observations. The scientific law is abide by the scientific community and major research are based on this. The content or information of scientific law cannot be changed.

7 0

3 years ago

Which of the following statements about gravitational potential energy is not true?

nevsk [136]

Answer:

B and D

Explanation

Gravitational potential energy does not relate to graphs and it is about a moving object so b and d would not be correct

3 0

3 years ago

Objects in motion eventually stop moving due to a _____ .can someone help me with this question

Tom [10]

External force.

Air resistance, friction, grass rubbing on a rolling ball, etc.

If there is no external force on a moving object, it keeps going.

Forever !

8 0

4 years ago

In a model AC generator, a 505 turn rectangular coil 8.0 cm by 30 cm rotates at 120 rev/min in a uniform magnetic field of 0.59

Ludmilka [50]

(a) Maximum emf: 90 V (2 sig. fig.)
(b) Emf at π/32 s: 85 V.
(c) t = 0.125 s.

<h3>Explanation</h3><h3>(a)</h3>

The maximum emf in the coil depends on

the maximum flux linkage through the coil, and
the angular velocity of the coil.

Maximum flux linkage in the coil:

$\phi_\text{max} = B\cdot A\cdot N = 0.59\;\text{T}\times(0.08 \times 0.30)\;\text{m}^{2} \times 505 = 7.2\;\text{Wb}$ .

Frequency of the rotation:

$f = 120\;\text{rev}\cdot\text{min}^{-1} = 2 \;\text{rev}\cdot\text{s}^{-1}$ .

Angular velocity of the coil:

$\omega = 2\;\pi\;\text{rev}^{-1}\times 2\;\text{rev}\cdot\text{s}^{-1} = 4 \pi \;\text{s}^{-1}$ .

Maximum emf in the coil:

$\epsilon_\text{max} = \omega\cdot\phi_\text{max} = 4\;\pi \times 7.2\;\text{Wb} = 90\;\text{V}$ .

Emf varies over time. The trend of change in emf over time resembles the shape of either a sine wave or a cosine wave since the coil rotates at a constant angular speed. The question states that emf is "zero at t = 0." As a result, a sine wave will be the most appropriate here since $\sin{0} = 0$ .

$\displaystyle \epsilon(t) = \epsilon_\text{max}\cdot \sin{(\omega\cdot t)}$ .

Make sure that your calculator is in the radian mode.

$\displaystyle \epsilon\left(\frac{\pi}{32}\right) = 90\;\text{V}\times \sin\left(4\;\pi\times \frac{\pi}{32}\right) = 85\;\text{V}$ .

Consider the shape of a sine wave. The value of $\displaystyle \sin\left(\omega \cdot t\right)$ varies between -1 and 1 as the value of $t$ changes. The value of $\epsilon$ at time $t$ depends on the value of $\sin(\omega \cdot t)$ .