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Sphinxa [80]
4 years ago
6

Which star has the highest surface temperature?

Physics
1 answer:
Furkat [3]4 years ago
4 0
The blue star is the hottest star.

Fun Fact: The coldest stars are red
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The temperature of one substance is 90 degrees F and another
valina [46]

Answer:

Substance that is 90 degrees will lose energy and the substance that is 50 degrees will gain energy

Explanation:

because that is how energy work duhhhhh

7 0
3 years ago
Which of the following changes would double the force between two charged particles? O A. Decreasing the distance between the pa
jarptica [38.1K]

Let's check

\\ \rm\dashrightarrow F=\dfrac{k}{q_1q_2}{r^2}

\\ \rm\dashrightarrow F\propto Q

\\ \rm\dashrightarrow F\propto \dfrac{1}{r^2}

So

Option A and C can be used

6 0
2 years ago
Read 2 more answers
The laws of reflection holds for__
RSB [31]

Answer:

c)both

Explanation:

The laws of reflection hold true for all the reflecting surfaces either spherical or plane. Therefore, the plane mirror, concave mirror and the convex mirror all will follow the laws of reflection.

5 0
3 years ago
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An environmentally-conscious student is breaking the rings from a six-pack drink holder before disposing of it. This reduces the
katrin2010 [14]

Answer: seen below.

Explanation:

Firstly we need to remember what exothermic reaction is in thermodynamics. exothermic reaction describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light, sound, or electricity.

In this scenario, due to the heating up nature noticed by the ring during breaking shows that energy is being released to the surrounding in the form of heat which suggest it being an exothermic reaction.

8 0
4 years ago
A circular coil with 600 turns has a radius of 15 cm. The coil is rotating about an axis perpendicular to a magnetic field of 0.
Reil [10]

Answer:

The angular frequency is the coil rotating is 1.9 rad/s.

Explanation:

Given that,

Number of turns = 600

Radius = 15 cm

Magnetic field = 0.020 T

Maximum induced emf = 1.6 V

We need to calculate the angular frequency is the coil rotating

Using formula emf

\epsilon =NBA\omega\sin\omega t

When  induced emf is maximum so \sin\omega t will be 1.

\omega=\dfrac{\epsilon}{NBA}

Where, N = number of turns

A = area

B = magnetic field

Put the value into the formula

\omega=\dfrac{1.6}{600\times\pi\times(15\times10^{-2})^2\times0.020}

\omega=1.9\ rad/s

Hence, The angular frequency is the coil rotating is 1.9 rad/s.

6 0
3 years ago
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