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3 years ago

explain the interaction and roles of electromagnetic force and strong nuclear force in the nucleus of an atom

Physics

1 answer:

kenny6666 [7]3 years ago

3 0

Answer:

Gravity holds stars together and keeps us on the ground. The electromagnetic force ensures the stability of atoms and makes chemistry happen. The strong nuclear force holds the kernels of matter, atomic nuclei, together, and powers the burning of stars.

Explanation:

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You wish to buy a motor that will be used to lift a 10-kg bundle of shingles from the ground to the roof of a house. The shingle

gogolik [260]

Answer:

$\tau=19.21\ N-m$

Explanation:

It is given that,

Mass of bundle of shingles, m = 10 kg

Upward acceleration of the shingles, $a=1.5\ m/s^2$

The radius of the motor of the pulley, r = 0.17 m

Let T is the tension acting on the shingles when it is lifted up. It can be calculated as :

$T-mg=ma$

$T=m(g+a)$

$T=10\times (9.8+1.5)$

T = 113 N

Let $\tau$ is the minimum torque that the motor must be able to provide. It is given by :

$\tau=r\times T$

$\tau=0.17\times 113$

$\tau=19.21\ N-m$

So, the minimum value of torque is 19.21 N-m. Hence, this is the required solution.

4 0

3 years ago

Determine the frequency of a sound wave if it has a speed of 350 m/s and a wavelength of 3.80 m.

Eva8 [605]

Since we have , v=f×lambda (wavelength). Where v equals 350m/s and wavelength equals 3.80. so it will become f = v/lambda=350/3.80=92.1052Hz

7 0

3 years ago

A ball is thrown straight up from the edge of a 15 foot balcony with initial velocity 40 feet/sec. how high will the ball travel

NeTakaya

Hello
The initial height of the ball is $S_i = 15~ft = 4.6~m$ , while the initial velocity is $v_i = 40ft/s = 12.2~m/s$ .
This is a uniformly accelerated motion, where the acceleration is the gravitational acceleration: $a=-9.8~m/s^2$ , where the negative sign means that the acceleration points downwards.
We can proceed in two steps:

1) First of all, we calculate the time the ball needs to reach the maximum height. At the point of maximum height, the velocity is zero: $v_f = 0m/s$ .
We can use the formula
$a= \frac{v_f-v_i}{\Delta t}$
To find the time:
$\Delta t= \frac{v_f-v_i}{a} = 1.2 s$

2) At this point, we can calculate the total height reached by the ball after this time, i.e. the maximum height:
$S=S_i+v_i \Delta t+ \frac{1}{2} a (\Delta t)^2 =$
$= 4.6~m+(12.2~m/s)(1.2~s)+ \frac{1}{2}(-9.8~m/s^2)(1.2~s)^2 = 12.1~m$

3 0

3 years ago

Select the correct answer. Which healthy snack can provide protein after physical activity? A. an orange slice B. pretzels C. yo

givi [52]

Answer:

From the given choices, the healthy snack that can provide protein after physical activity is the third option, yogurt. Yogurts are derived from fermentation of raw materials by the healthy bacteria, usually of lactobacillus origin. Other items in the choices are not able to provide protein.

Explanation:

4 0

3 years ago

Help with these questions please?

iren2701 [21]

Three

The ray of light will come out of the glass at 90 degrees to the normal. What goes in is called the critical angle. At 90 degrees the ray will reflect rather than refract. This is just for interest.

Formula

n2 * sin(θ2) = n1* sin(θ1)

Givens

θ2 = 90 degrees

n2 = 1

n1 = ?

θ1 = 43.6

Solution

n1 * sin(43.6) = 1 * 1

n1 = 1/sin(43.6)

n1 = 1/0.6896

n1 = 1.45

Four

This problem is very instructive. It uses a little known trick so that you don't have to know the exact speed of light of one of the speeds. The other speed is compared to it. You could do it the long way and figure out the speeds in crown glass from air to the crown glass, and do the same thing with the other color. That would work. An easier way is not to bother. Call the speed of one of the colors = 1. Is the other speed greater or less than 1? We'll see.

The next thing you have to realize is that the speed is going to be highest for either red or violet. That's because n is highest for violet and lowest for red. The intermediate colors don't matter. So the answer is either A or B.

They have n's between violet and red and so they will not be an answer. That means you can eliminate green and yellow (answers C and D).

Formula

v1/v2 = n2/n1

Givens

v1 = 1 (we'll say this is red)

v2 = ? (this is violet)

n2 = 1.62 for red. This is probably not exact, but it does not have to be. You just have to notice that violet is higher

n1 = 1.65 for violet. So you are trying to solve the relative speed of v2.

Solution

v1/v2 = n2/n1

1/v2 = 1.65/1.62 Cross multiply

1.65 * v2 = 1 * 1.62 Divide by 1.65

v2 = 1.62/1.65

v2 = 0.98

Conclusion.

The speed of violet is going to be slower than the speed of red.

Rule: the higher the index of refraction, the lower the speed.

Answer: red has the greater speed.

5 0

3 years ago

explain the interaction and roles of electromagnetic force and strong nuclear force in the nucleus of an atom​

explain the interaction and roles of electromagnetic force and strong nuclear force in the nucleus of an atom