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allochka39001 [22]
4 years ago
10

It is recommended that children have no more than two sets of dental X-rays per year. Although X-rays have many benefits, they c

an be dangerous to human health because they are A) generated by radioactive material. B) high amplitude, high energy waves. C) high frequency, high energy waves. D) generated by high voltage machinery.
Physics
2 answers:
MatroZZZ [7]4 years ago
8 0
<span>Although X-rays have many benefits, they can be dangerous to human health because they are (C) high frequency, high energy waves.</span>
eduard4 years ago
6 0

Answer:

c

Explanation:

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a pitcher throws a softball toward the home plate. when the ball hits the catchers mitt its horizontal velocity is 32 meters/sec
lora16 [44]

F = (mass)(acceleration) = ma

m = 0.2 kg

Vi = 32 m/s

t = 0.5 s

Vf = 0 m/s (since it was put to stop)

a=(Vf-Vi)/t

a=(0-32)/0.5

a = 64 m/s^2 (decelerating)

F = ma = (0.2 kg)(64 m/s^2)

F = 12.8 N

<span>Hope this answer will be a good h<span>elp for you.</span></span>

8 0
3 years ago
Read 2 more answers
Which of the following is equivalent to 10 kilograms?
EleoNora [17]

a) 1000 grams = 1 kg ... no


d) 1000 centigrams


7 0
3 years ago
An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. What is the image height? (Indicate the obj
boyakko [2]

The image height is -10 cm (the image is upside down)

Explanation:

We can solve the problem by using the mirror equation:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where:

f = 5 cm is the focal length of the mirror

p = 10 cm is the distance of the object from the mirror

q is the distance of the image from the mirror

Solving for q, we find:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{5}-\frac{1}{10}=\frac{1}{10}\\\rightarrow q= 10 cm

So, the distance of the image from the mirror is 10 cm.

Now we can find the image height by using the magnification equation:

\frac{y'}{y}=-\frac{q}{p}

where

y' is the height of the image

y = 1 cm is the height of the object

and using

p = 10 cm

q = 10 cm

We find the size of the image:

y' = -\frac{qy}{p}=-\frac{(10)(1)}{10}=-10 cm

where the negative sign indicates that the image is upside down.

#LearnwithBrainly

8 0
3 years ago
I had gotten this one wrong please help thank you
Nata [24]
Check the 1st 2nd 3rd and 4th boxes
4 0
4 years ago
Calculate the force of an object shot in the air with a mass of 2 kg and an acceleration of 9.81 m/s2.
Helen [10]

Answer:

Force = 19.62 Newton

Explanation:

Given the following data;

Mass = 2kg

Acceleration = 9.81 m/s²

To find the force;

Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.

Mathematically, it is given by the formula;

Force = mass * acceleration

Substituting into the formula, we have;

Force = 2 * 9.81

Force = 19.62 Newton

4 0
4 years ago
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