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mina [271]
3 years ago
10

What dangers would divers face if they descended quickly to a great depth

Physics
1 answer:
pickupchik [31]3 years ago
5 0

Explanation:

If a diver ascends too quickly, the nitrogen gas in his body will expand at such a rate that he is unable to eliminate it efficiently, and the nitrogen will form small bubbles in his tissues. This is known as decompression sickness, and can be very painful, lead to tissue death, and even be life threatening.

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4. An applied force of 6.2 N acts on a 2.1-kg object, pushing it horizontally across a surface
Rama09 [41]

The frictional force on the body is  0.25 N the net force on the body is  5.95 N while the acceleration produced is 2.83 m/s^2

<h3>What is the net force?</h3>

The net force is used to describe the resultant force that acts on the object.

The frictional force that acts on the object s obtained from;

Ff = 0.15 * 2.1-kg * 9.8 m/s^2

Ff = 0.25 N

The net force that acts on the body = F - Ff where F is the applied the force

=  6.2 N - 0.25 N

Net force = 5.95 N

Now;

Net force = ma

a= Net force /m

a = 5.95 N/2.1-kg

a = 2.83 m/s^2

Learn more about the net force:brainly.com/question/18031889

#SPJ1

5 0
2 years ago
For each of the following velocity vectors, give the vector component, the scalar component, and the magnitude. (a) v = 48.0j m/
Oduvanchick [21]

Obtaining the component part of the letter 'i' warns that it is the velocity is oriented on the X axis. At the same time the numeric part, in this particular case will represent the scalar part and therefore the magnitude of the vector.

The velocity is

\vec{v} = 48.0\hat{i} \text{ m/s }

The vector component of the velocity is

v_x = 48.0m/s

The scalar component of the velocity is

v = 48.0m/s

The magnitude of the velocity is

v = 48.0m/s

3 0
4 years ago
In order for us to see the red apple, where do the wavelengths of light have to go?
tankabanditka [31]

Answer:

Explanation:650

colour* wavelength (nm) energy (eV)

red 650 1.91

orange 600 2.06

yellow 580 2.14

green 550 2.25

5 0
4 years ago
Read 2 more answers
A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water
ivolga24 [154]
Power<span> is the rate of doing work. It is the amount of energy consumed per unit time. Having no direction, it is a scalar quantity. We express it as follows:

P = W / t
          where W = Fd
                     F = mg

Therefore,

P = mgd / t
P = (30)(9.81)(20) / 1 = 5886 W</span>
3 0
4 years ago
The momentum of light, as it is for particles, is exactly reversed when a photon is reflected straight back from a mirror, assum
LenKa [72]

Answer:

a)   E = 2.00 10³ J , b)   I = 6.66 10⁻⁶ N s , c)   F = 1.66 10⁻⁶ N

Explanation:

a) The intensity is defined as the power per unit area

          I = P / A

          P = I A

Power is energy for time

         P = E / t

We replace

        E / t = I A

        E = I A t

        E = 1.0 10³ 2.0 1.00

        E = 2.00 10³ J

b) The moment is

       p = U / c

In the case of a reflection the speed is reversed, so the moment

      Δp = 2 U / c

       I = Δp

       I = 2 U / c

       I = 2.00 10³/3 10⁸

       I = 6.66 10⁻⁶ N s

c) The defined impulse is

        I = F t

       F = I / t

For a time of 1 s

       F = 6.66 10⁻⁶ / 1

       F = 1.66 10⁻⁶ N

d) Suppose n small mass mirror m = 10 10⁻³ kg, we write Newton's second law

        F = ma

        a = F / m

        a = 1.66 10⁻⁶ / 10 10⁻³

         a = 1.66 10⁻⁴ m / s

We see that the acceleration is very small and attended to increase the mass of the mirror will be less and less, so the assumption of no twisting of the mirror is very reasonable

5 0
3 years ago
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