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Natali5045456 [20]
2 years ago
10

Which hygiene step would best help prevent the flu

Physics
2 answers:
beks73 [17]2 years ago
5 0

Answer:

taking a shower brushing your teeth and washing your hands

Explanation:

bixtya [17]2 years ago
3 0

Answer:

D. Washing your hands regularly

Explanation:

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Is O2 considered one atom or 2 atoms?
natulia [17]
O2 is considered 2 atoms because O2 is 2 oxygen atoms.

4 0
3 years ago
Read 2 more answers
Plucking a guitar string is a physical change; however, the process produces sound. Explain. plz heip
Vlad [161]
The vibration of the string moves the surrounding air molecules. The air molecules move in the form of a wave, traveling a distance dependent upon the magnitude of the vibration.
7 0
3 years ago
A boy kicks a football from ground level. The ball takes 3 seconds to reach its maximum height. What is the angle of the initial
ruslelena [56]
<h2>The angle of the initial velocity with respect to the horizontal is 85.14°</h2>

Explanation:

Given that the ball takes 3 seconds to reach its maximum height.

Consider the vertical motion of ball till maximum height.

We have equation of motion v = u + at

     Acceleration, a = -9.81 m/s²

     Final velocity, v = 0 m/s    

     Time, t = 3 s

     Substituting

                      v = u + at  

                      0 = u + -9.81 x 3

                      u = 29.43 m/s

Initial vertical velocity is 29.43 m/s.

Now consider horizontal motion of ball.

Time of flight of ball = 2 x Time to reach maximum height = 2 x 3 = 6 s

Displacement = 15 m

We have equation of motion s = ut + 0.5 at²

        Displacement, s = 15 m

        Acceleration, a = 0 m/s²  

        Time, t = 6 s      

     Substituting

                      s = ut + 0.5 at²

                      15 = u x 6 + 0.5 x 0 x 6²

                      u = 2.5 m/s

Initial horizontal velocity is 2.5 m/s

Let r be the initial velocity and θ be the angle with horizontal

              Initial vertical velocity = rsinθ = 29.43 m/s

              Initial horizontal velocity = rcosθ = 2.5 m/s

Dividing

              \frac{rsin\theta }{rcos\theta }=\frac{29.43}{2.5}\\\\tan\theta=11.77\\\\\theta=85.14^0

The angle of the initial velocity with respect to the horizontal is 85.14°

4 0
2 years ago
The gravitational force between two objects increases as mass
nasty-shy [4]
F=g(m1*m2)/r^2
gravitational force is directly proportional to product of masses and inversely proportional to square of distance between them.so consequently mass should increase and distance should decrease
7 0
3 years ago
Read 2 more answers
A body builder loads a bar with 550 newtons (~125 pounds) of weight and pushes the bar over her head 10 times. Each time she lif
Neporo4naja [7]

Work = (force) x (distance)

 (550 newtons) x (0.5 meter) = 275 joules each lift .

 (275 joules/lift) x (10 lifts)  =  2,750 joules of work all together.


Power = (work done) / (time to do the work)

           = (2,750 joules) / (20 seconds)

           =    137.5 watts .        (about 0.18 horsepower)

6 0
3 years ago
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