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Temka [501]
3 years ago
11

Which statement best describes the law of conservation of energy?

Physics
2 answers:
shtirl [24]3 years ago
7 0

Answer:

b!!!! did it help? :)))

Lubov Fominskaja [6]3 years ago
3 0
B. Energy cannot be created or destroyed, but it can change into different forms.
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There is a vector A with magnitude 5 units pointing toward west, and a
Anit [1.1K]
Using the Pythagorean’s theorem to find the resultant, we find 5’2 +3’2=x’2
X=square root of 34=5.8unitd
4 0
3 years ago
A cosmic ray muon with mass mμ = 1.88 ✕ 10−28 kg impacting the Earth's atmosphere slows down in proportion to the amount of matt
anyanavicka [17]

Answer:

a. the magnitude of the force experienced by the muon is 2.55 × 10⁻¹⁹N

b.  this force compare to the weight of the muon; the force is 1.38 × 10⁸ greater than muon

Explanation:

F= ma

v²=u² -2aS

(1.56 ✕ 10⁶)²=(2.40 ✕ 10⁶)²-2a(1220)

a=1.36×10⁹m/s²

recall

F=ma

F = 1.88 ✕ 10⁻²⁸ kg × 1.36×10⁹m/s²

F= 2.55 × 10⁻¹⁹N

the magnitude of the force experienced by the muon is 2.55 × 10⁻¹⁹N

b.  this force compare to the weight of the muon

F/mg= 2.55 × 10⁻¹⁹/ (1.88 ✕ 10⁻²⁸ × 9.8)

= 1.38 × 10⁸

6 0
3 years ago
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first a
prisoha [69]

Explanation:

This is a good example of Doppler effect

Given

Source velocity Vs=20m/s

Apparent frequency Fa= 5.2 Hz

Recall speed of sound V=340m/s

The frequency of the horn Fh=?

But mathematically Fh=(V-Vs/V)*Fa

(340-20)/340*5.2=4.89Hz

6 0
3 years ago
Read 2 more answers
A 4-kg block and a 2-kg block can move on the horizontal frictionless surface. The blocks are accelerated by a+12-N force that p
lozanna [386]

Answer:

F_n = -4 N

Explanation:

Net external force that exerted on the block is given as

F_{net} = (m_1 + m_2) a

here we know that

F = 12 N

m_1 = 4 kg

m_2 = 2 kg

now we have

12 = (4 + 2) a

so we have

a = 2 m/s^2

now the force exerted by bigger block on smaller block is given as

F_n = ma

F_n = (2 \times 2)

F_n = 4 N

now we know that two blocks will exert equal and opposite force on each other

so here the force exerted by 2 kg block on 4 kg block will be

F_n = -4 N

5 0
3 years ago
PLEASE HELP QUICKLY 13 POINTS +7 FOR BEST ANSWER!!! calculate the density of an object that has a mass of 3.0 g and a volume of
raketka [301]
Density = 3/5 = 0.6g/cm^3. Since the density is less than the density of water, which is 1, the object will float.
8 0
3 years ago
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