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2 years ago

The sun produces energy by forming in its core

1 answer:

7 0

The Sun produces energy by forming "Helium" in its core by the process of "Nuclear fusion"

Hope this helps!

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Replacing an object attached to a spring with an object having 14 the original mass will change the frequency of oscillation of

Pachacha [2.7K]

Answer:

The frequency changes by a factor of 0.27.

Explanation:

The frequency of an object with mass m attached to a spring is given as

$f$ = $\frac{1}{2\pi } \sqrt{\frac{k}{m} }$

where $f$ is the frequency

k is the spring constant of the spring

m is the mass of the substance on the spring.

If the mass of the system is increased by 14 means the new frequency becomes

$f_{n}$ = $\frac{1}{2\pi } \sqrt{\frac{k}{14m} }$

simplifying, we have

$f_{n}$ = $\frac{1}{2\pi \sqrt{14} } \sqrt{\frac{k}{m} }$

$f_{n}$ = $\frac{1}{3.742*2\pi } \sqrt{\frac{k}{m} }$

if we divide this final frequency by the original frequency, we'll have

==> $\frac{1}{3.742*2\pi } \sqrt{\frac{k}{m} }$ ÷ $\frac{1}{2\pi } \sqrt{\frac{k}{m} }$

==> $\frac{1}{3.742*2\pi } \sqrt{\frac{k}{m} }$ x $2\pi \sqrt{\frac{m}{k} }$

==> 1/3.742 = 0.27

7 0

3 years ago

An electron travels 1.92 m in 4.47 × 10−8 s. How fast is it traveling? Answer in units of m/s.

malfutka [58]

Speed = (distance covered) / (time to cover the distance).

= (1.92 meters) / (4.47 x 10⁻⁸ second)

= 42,950,000 meters/second (rounded to the nearest 10,000 m/s)

That's about 96.1 million miles per hour, or about 14% of the speed of light.

6 0

3 years ago

Calculate the current passing through a conductor of resistance 4ohms. If a potential difference of 15V its ends______

statuscvo [17]

Explanation:

current = velocity/resistance

I = V/R

15/4

current = 3.75A

hope this helps...

6 0

2 years ago

Which two options are examples of waves refracting?

LUCKY_DIMON [66]

A and b!
hope this helps!

3 0

2 years ago

A 14 kg tennis ball moves at a velocity of 11 m/s. The ball is struck by a racket, causing it to rebound in the opposite directi

Charra [1.4K]

To solve this problem we will apply the concepts related to the momentum.

This is defined as the product between the change in velocity and the mass of the object, that is

$p = m\Delta v$

$p = m (v_f-v_i)$

Where,

m = mass

$v_f =$ Final velocity

$v_i =$ Initial velocity

Our values are given as,

m = 14kg

$v_i$ = 11m/s

$v_f= - 5m/s \rightarrow$ the negative Symbol implies that the direction is opposite to the initial one and therefore there is also a change in the sense of magnitude

$p = (14)(-5-11)$

$p = 14(-16)$

$p = -224 kg \cdot m/s$

The negative symbol indicates that the momentum has a direction opposite to that of the initial velocity. Or failing that, it has the same direction of the final speed

7 0

3 years ago