An element can be identified by its spectrum. True False

Answers

Answer 1

Answer: True. Even though some elements have very similar spectrums that are not easy to tell apart so need to be examined carefully.

Answer 2

Answer:

Answer: True on odyssey

Explanation:

Related Questions

What is the closest universe to Earth?
Which describes the changes in visible light moving from red to violet?
The substance that gets broken down in a homogeneous mixture is the .
Most of the Earth's volcanoes occurA. near the center of tectonic plates.B. where there are no tectonic plates.C. along tectonic plate boundaries.D. before tectonic plates can form.
In a game of darts, the dart thrower releases the dart directly at the center of the target (the "bull’s eye") with a speed of 13.0 m/s, and the dart strikes the wall, 0.23 m directly below the center of the target. How far from the wall, along the x-axis, was the dart released?

Energy is _______ when it's moved from one object to another.a. conducted
b. transferred
c. lost
d. created

Answers

Energy is (transferred) when it is moved from one obect to another.

The answer is (b)

Energy is transferred when it's moved from one object to another.

That is because energy cannot be created nor destroyed, only conducted.

A spring has a natural length of 20cm. If a 25-N force is required to keep it stretched to a length of 30 cm, how much work is required to stretch it from 20 cm to 25 cm?

Answers

First, we use Hooke's Law to calculate the spring constant, k:
F = kx
k = 25 / (0.3 - 0.2)
k = 250 N/m

Work = 1/2 kx²
W = 1/2 x 250 x (0.25 - 0.2)²
W = 0.3125 Joule

According to Newton's third law of motion, if you push against a wall, the wall will __________.a. attract you with its low gravity
b. fall over once you overcome its inertia
c. push against you with equal force
d. heat up due to energy transfer

Answers

c. push against you with equal force

What is newton's third law of motion?

Newton's third law simply states that for every action there is an equal and opposite reaction.

So, if object A acts a force upon object B, then object B will exert an opposite yet equal force upon object A.

Newton's third law of motion describes that,

Forces always act in equal but opposite pairs.

Another way of saying this is for every action, there is an equal but opposite reaction.

This means that when you push on a wall, the wall pushes back on you with a force equal in strength to the force you exerted.

A person pushes against a wall (action force), and the wall exerts an equal and opposite force against the person (reaction force).

Therefore,

According to Newton's third law of motion, if you push against a wall, the wall will push against you with equal force.

Learn more about Newton's third law of motion here:

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C. push against you with equal force

When the engineer first sees the car, the locomotive is 100m from the crossing and its speed is 30m/s. If the engineer reaction time is 0.47 s what should the magnitude of the minimum deceleration to avoid an accident?

Answers

Answer:

The deceleration must have the engineer to avoid the accident is

a=-5.238 $(m)/(s^(2) )$

Explanation:

$x_(0)=100m\nv_(0)=30 (m)/(s) \nt=0.47 s$

While the engineer reacts the train continue moving so

$x_(f) = v*t= 30(m)/(s) *0.47s= 14.1 m$

$x_(t)= x_(o)+x_(f)\nx_(t)= 100m-14.1m=85.9m$

Now the final velocity have to be zero so using equation can find deceleration

$V_(f) ^(2) =V_(o) ^(2)+2*a*x_(f)\n 0= V_(o) ^(2)+2*a*x_(f)\na=-(V_(o) )/(2*x_(f))\na=-((30(m)/(s)) ^(2) )/(2*85.9m) \na=-5.238 (m )/(s^(2) ) } \n$

Which statement BEST describes how the body moves?a. Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.
b. Cardiac and smooth muscles are made of muscle fibers, nerves, and cartilage and are responsible for all movement in the body.
c. Smooth muscles, which are made of blood vessels, fibers, and nerves, allow for all activities that use slow-twitch muscle fibers.
d. Skeletal muscles, which are made of tendons, nerves, and fibers, line the body cavities and allow for support and movement.

Answers

Answer;

A. Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

Explanation;

Muscular tissues functions in movement and locomotion through its direct connection with the skeletal system.
Skeletal muscles are responsible for moving the body. The skeletal muscle contractions pull on tendons, which as attached to bones. When the skeletal muscle contraction causes the muscle to shorten, the bone and thus the body par will move.
Skeletal muscles also provide structural support for the entire body.

Answer:

Skeletal muscles, which are made of fibers, nerves, and blood vessels, contract in order to make the body move.

Explanation:

Frost wedging happens when _____.water ions dissolve rock minerals
water freezes inside a rock, causing it to break
oxygen reacts with the chemicals in rock
rocks break from repeated exposure to the Sun's heat

Answers

Answer: water freezes inside a rock, causing it to break

Weathering is a natural process in which the rocks break into pieces or sediments by the action of wind, water and chemical agents. Frost wedging is a physical weathering process. It occurs in an area where temperature fluctuations occurs due to change in the climatic conditions. This occurs due to rapid heating and cooling. The rocks lying in a cold environment, the water residing in the rocks gets freezed. The water in ice form that is solid form acquire more space than in liquid form, therefore, the developed ice will affect the physical structure of the rock. The formation of ice results in the development of break or crack in the rock typically in the shape of a wedge and thus the phenomena is called as frost wedging.

Hence, frost wedging happens when water freezes inside a rock, causing it to break.

Answer:

Frost wedging happens when water freezes inside of a rock, causing it to break

Other Questions

You step into an elevator on the 50th floor and it quickly accelerates downward. For a second, until steady speed is reached, __________. A.) your weight is unchanged but your mass decreases B.) your mass is unchanged but your weight decreases C.) neither your mass nor weight change but the gravitational force decreases D.) neither your mass nor weight change but your apparent weight decreases

Which of these charges has the greatest magnitude?a charge of -5a charge of -2a charge of +4O a charge of +1

A circuit contains a 12 volt battery and two 3 ohm bulbs in series. Calculate the current

Which state of matter has the greatest amount of kinetic energy?