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2 years ago

Which of the following is true concerning nuclear fusion?

1 answer:

6 0

Choice-a is a very rubbery, imprecise, ambiguous, slippery statement. But it's probably less wrong than any of the other choices on the list.

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A hiker walks 11 km due north from camp and then turns and walks due east. The

motikmotik

Answer:

Thats probably 11

Explanation:

4 0

3 years ago

A ball is thrown horizontally from the top of a 41 m vertical cliff and lands 112 m from the base of the cliff. How fast is the

yanalaym [24]

Answer:

4.78 second

Explanation:

given data

vertical cliff = 41 m

height = 112 m

solution

we know here time taken to fall vertically from the cliff = time taken to move horizontally ..........................1

so we use here vertical component of ball

and that is accelerated motion with initial velocity = 0

so we can solve for it as

height = 0.5 × g × t² ........................2

put here value

112 = 0.5 × 9.8 × t²

solve it we get

t² = 22.857

t = 4.78 second

ball thrown horizontally from the top of the cliff in 4.78 second

4 0

3 years ago

What is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 seconds? Explain your answer.

RUDIKE [14]

Answer:

a = 0 m/s²

Explanation:

given,

car moving at steady velocity = 100 Km/h

1 km/h = 0.278 m/s

100 Km/h = 27.8 m/s

time of acceleration = 100 s

acceleration is equal to change in velocity per unit time.

$a=\dfrac{dv}{dt}$

change in velocity of the car is 27.8 - 27.8 = 0

$a=\dfrac{0}{100}$

a = 0 m/s²

If the car is moving with steady velocity then acceleration of the car is zero.

Hence, the acceleration of the car is equal to a = 0 m/s²

3 0

3 years ago

The hydrogen atom, changing from its first excited state to its lowest energy state, emits light with a wavelength of 122 nm. Th

tatyana61 [14]

Answer:

true b and c

Explanation:

n the electromechanical transitions of the atoms the relationship must be fulfilled

$\frac{x}{\lambda }$ = R (1 / nf - 1 / no²)

where for the final state nf = 1 giving in the case of hydrogen the Lymma series whose smallest wavelength is lam = 122 nm with nf = 1 and there are a series of spectral lines for each value of n of the final state

in the case of sodium so well it has a transition from an excited state to the kiss state (bad)

Now let's review the different proposals

a) False. The electronic potential for sodium is much lower than for hydrognosia

b) True

c) True

d) true

8 0

2 years ago

HELLO I NEED YOU HELP WITH THIS SCIENCE QUESTION NO LINKS!!!

sweet [91]

the study of how matter and energy interact

the study of the natural world around us

the study of human bodies and how they move

8 0

2 years ago