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3 years ago

Please helpp!! Questions 1-5

Physics

1 answer:

Fofino [41]3 years ago

6 0

Answer:

A:Time (minutes)

B: Temp(degrees c)

2. Downward trend (temperature goes down as time goes on )

A: not sure

B: temperature

4.the temperature is going down

5. Closes off any open airways

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A spherical shell rolls without sliding along the floor. The ratio of its rotational kinetic energy (about an axis through its c

True [87]

Answer:

The ratio is $\frac{RE}{TE} = \frac{2}{3}$

Explanation:

Generally the Moment of inertia of a spherical object (shell) is mathematically represented as

$I = \frac{2}{3} * m r^2$

Where m is the mass of the spherical object

and r is the radius

Now the the rotational kinetic energy can be mathematically represented as

$RE = \frac{1}{2}* I * w^2$

Where $w$ is the angular velocity which is mathematically represented as

$w = \frac{v}{r}$

=> $w^2 = [\frac{v}{r}] ^2$

$RE = \frac{1}{2}* [\frac{2}{3} *mr^2] * [\frac{v}{r} ]^2$

$RE = \frac{1}{3} * mv^2$

Generally the transnational kinetic energy of this motion is mathematically represented as

$TE = \frac{1}{2} mv^2$

$\frac{RE}{TE} = \frac{\frac{1}{3} * mv^2}{\frac{1}{2} * m*v^2}$

$\frac{RE}{TE} = \frac{2}{3}$

5 0

3 years ago

60 POINT!!!!!!

Paladinen [302]

Answer:

h and I have been working on the sea for the last few days

7 0

3 years ago

Read 2 more answers

In some cases, neither of the two equations in the system will contain a variable with a coefficient of 1, so we must take a fur

levacccp [35]

Answer:

Explanation:

Given the simultaneous equation,

3C+4D=5 .............. 1

2C+5D=2 ............... 2

Solving for the value of C and D using substitution method.

From equation 1;

3C = 5-4D

Divide both sides by 3

3C/3 = (5-4D)/3

C = (5-4D)/3 .... 3

From equation 2:

2C+5D=2

5D = 2-2C

Divide both sides by 5;

5D/5 = 2-2C/5

D = (2-2C)/5 ..... 4

Substitute equation 4 into 3;

C = 5-4{(2-2C)/5}/3

C = [5 - (8-8C/5)]/3

C = [25-(8-8C)/5]/3

C = (17+8C)/15

15C = 17+8C

15C-8C = 17

7C = 17

C = 17/7

Substitute C = 17/7 into equation 4 to get the value of D

D = (2-2(17/7))/5

D = (2-34/7)/5

D = 14-34/35

D = -20/35

D = -4/7

<em>Hence the value of C = 17/7, D = -4/7</em>

6 0

4 years ago

Help uhh i need to know this answer

BabaBlast [244]

Answer:

Explanation:

2. 330.63 ft because v*t=d and 3.09*107=330.63

3. 4.2 because 10/2.4=4.1666

4. 130 miles because 2 hours times 65mph= 130

5. 62.3 seconds because 480000/7700=62.33766233

8. 60 meters, because 0.5 *120 (because 2 minutes converted to seconds is 120) is equal to 60.

7 0

4 years ago

As a laudably skeptical physics student, you want to test Coulomb's law. For this purpose, you set up a measurement in which a p

monitta

Answer:

force F = 1.66 × $10^{-13}$ N

Explanation:

given data

proton and an electron = 865 nm

solution

we get here force that is express as

force F = k q1 q2 ÷ r² ......................1

put here value and we get

force F = 9 × $10^{9}$ × $\frac{1.6\times (10^{-19})^{2}}{865 \times (10^{-9})^{2}}$

force F = 1.66 × $10^{-13}$ N

4 0

3 years ago