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Morgarella [4.7K]
3 years ago
13

Please help me, I don’t know the answer

Physics
2 answers:
AfilCa [17]3 years ago
6 0

Answer:

I'm pretty sure it is D:2.

Explanation:

Since potential energy is basically something sitting still. If not C then D.

den301095 [7]3 years ago
3 0
I also think it’s D

Hopefully we helped
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An electromagnetic wave travels in a vacuum. The wavelength of the wave is tripled. How is this accomplished? by tripling the fr
makkiz [27]

Answer:

by reducing the frequency of the wave by a factor of three

Explanation:

Speed = wavelength * frequency.

Wavelength = speed/frequency

The speed of an electromagnetic wave in a vacuum is constant. Meanwhile the wavelength and frequency have an inverse relationship which means for every rise in any of the parameters there will also be a corresponding fall.

Since the wavelength is tripled then the frequency will also be reduced by a factor of 3

4 0
3 years ago
Classify each of these soluble solutes as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. drag each item to the a
horrorfan [7]
Three of these are strong electrolytes: 
- HCl (Hydrochloric acid) 
- HNO3 (Nitric acid) 
- NaOH (Sodium hydroxide) 

Two of these are Weak electrolytes: 
- HF (Hydrogen fluoride) 
- HC2H3O2 (Acetic acid) 

And the other two are Non-electrolytes: 
- C6H12O6 (Glucose) 
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4 0
4 years ago
Read 2 more answers
A 77.3 g mass is attached to a horizontal spring with a spring constant of 12.5 N/m and released from rest with an amplitude of
DENIUS [597]

Answer:

speed of the mass is 3.546106 m / s

Explanation:

given data

mass = 77.3 g = 77.3 × 10^{-3}  kg

spring constant k = 12.5 N/m

amplitude A = 38.9 cm = 38.9 ×10^{-2} m

to find out

the speed of the mass

solution

we will apply here conservation energy  that is

K.E + P.E = Total energy  ..................1

so that Total energy = K.E max = P.E max

we know  amplitude so we find out first P.E max that is  

PE max = K.E + P.E  

(1/2)kA² = (1/2)mv² + (1/2)kx²  

kA^² =  mv²+ kx²

so here v²  will be

v²  = k(A² - x²) / m  

v = √[(k/m)×(A² - x²)]  ............2

here x = (1/2)A   so from from 2 equation

v = √[(k/m)×(A² - (A/2)²)]

v = √[(k/m)×(3/4×A²)]

now put all value

v = √[(12.5/ 77.3 × 10^{-3} )×(3/4×(38.9 ×10^{-2})²)]

v = 3.546106 m / s

speed of the mass is 3.546106 m / s

6 0
3 years ago
How long is the photons journey from the milky way to earth
fgiga [73]
Well i’d love to answer your question but its missing some information. firstly the earth is within the milky way galaxy so something cannot travel “from” but if you said “through” the answer would be 299,792,458 meters a second
3 0
3 years ago
If you take two steps of different sizes, can you end up at your starting point (in other words, can two vectors with different
vfiekz [6]

Answer:

a) No, Two vectors with different magnitudes can never add up to zero.

b) Yes, Three or more vectors with different magnitudes can add up to zero.

Explanation:

a) No, Two vectors with different magnitudes can never add up to zero.

Given vector A and B

A = (x1,y1,z1) and B = (x2,y2,z2)

For A + B = 0

This conditions must be satisfied.

x1 + x2 = 0

y1 + y2 = 0

z1 + z2 = 0

Therefore, for those conditions to be meet the magnitude of A must be equal to that of B.

b) Yes, Three or more vectors with different magnitudes can add up to zero.

For example, three forces acting at equilibrium like supporting the weight of a person with two different ropes.

W = T1 + T2

Where;

W = Weight

T1 = tension of wire 1

T2 = tension of wire 2

6 0
3 years ago
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