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Dmitriy789 [7]
3 years ago
6

A skydiver jumps out of a hovering helicopter, so there is no forward velocity. Ignore wind resistance for this exercise. 1. Wha

t is the skydiver's acceleration
Physics
2 answers:
nevsk [136]3 years ago
3 0
1. What is the skydiver's acceleration?

Initially, like any falling object, a skydiver's downward acceleration is 9.8 meters/seconds^2, or about 28-35 feet per second squared. This acceleration reduces over a few seconds and approaches zero as the skydiver reaches terminal velocity.
Furkat [3]3 years ago
3 0

Answer:

a = g = 9.81 m/s^2

Explanation:

As we know that there is no wind resistance on the skydiver

so when he jumps out of the helicopter then in that case the net force on the diver will be due to gravity only

so his equation for force is given by

F = mg

now from the Newton's law of motion we will have

F_{net} = ma

from the given options we will have

mg = ma

so the acceleration is

a = g = 9.81 m/s^2

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Usually the force of gravity on electrons is neglected. To see why, we can compare the force of the Earth’s gravity on an electr
miv72 [106K]

Answer:

6.4\cdot 10^{-15} N

Explanation:

The electric force exerted on the electron is given by:

F=qE

where

q=1.6\cdot 10^{-19}C is the magnitude of the electron charge

E = 40000 V/m is the electric field

Substituting,

F=(1.6\cdot 10^{-19} C)(40000 V/m)=6.4\cdot 10^{-15} N

By comparison, the gravitational force exerted on the electron is:

F=mg

where

m=9.10939\cdot 10^{-31} kg is the mass of the electron

g = 9.8 m/s^2 is the acceleration due to gravity

Substituting,

F=(9.10939\cdot 10^{-31} kg)(9.8 m/s^2)=8.93\cdot 10^{-30}N

6 0
4 years ago
Give reason the si syetem of units is better than the mks system​
Elena-2011 [213]

is there a tutor available

4 0
4 years ago
A toy car attached to a rope is traveling around in a circle. It makes 4 laps in 12s.What is the angular velocity of the toy car
umka21 [38]

Answer:

2.09 rad/s

Explanation:

Given that,

A toy car makes 4 laps in 12 s.

We need to find the angular velocity of the toy car. We need to find the angular velocity of the toy car.

4 laps = 25.13 rad

So,

v=\dfrac{25.13\ rad}{12\ s}\\\\v=2.09\ rad/s

So, the angular velocity of the toy car is 2.09 rad/s.

3 0
3 years ago
Higher amplitudes sound will have a _____________________ sound while lower amplitude will have a __________________________ sou
lukranit [14]

Answer:

9)  HIGHER  AND LOWER INTESITY, 10) speed of sound must decrease.

11) guitar the strings, flute,  12) In the mountains,  13) sound of a low frequency horn (sub-wofeer)

     

Explanation:

In this exercise we are asked to complete the sentences.

9) the intensity of the sound is the square of the amplitude, the missing words are

      HIGHER INTESITY

      LOWER INTENSITY

10) the speed of sound is

          v = \sqrt{\frac{B}{\rho} }

and it is also related to temperature

         v = v_o \sqrt{1+ \frac{T}{273} }

We must be careful since the compressibility modulus (B) changes significantly between the solid, liquid and gaseous states, if we are in the same medium, the speed of sound decreases with increasing density. For a higher density the speed of sound decreases

Also the speed of sound increases with temperature, but its effect is less,

Therefore, by having these two effects in the opposite direction, the change in density is more important, so the speed of sound must decrease.

.

11) when you listen to a guitar the strings resonate with the instrument body

   on the flute has a resonance between the blown air and the flute tube

12) When you are in front of a tall object, the sound is reflected and the echo is heard.

      In the mountains, in the squares where there is a large object that reflects in sound

13) when we hear the sound of a low frequency horn (sub-wofeer) we feel the vibration of the air, this is an effect of the pressure energy of the sound on our chest

4 0
3 years ago
As water heats in a pot on a stove, it might produce some mist above its surface right before the water begins to roll. What is
mr_godi [17]
When a liquid is heated, the molecules gain kinetic energy. As the liquid begins to boil they have enough energy to break the intermolecular attractions between their neighbors. This happens first at the surface before the volume below has enough energy to boil. Thus you see high energy water molecules escaping from the surface as mist.
4 0
4 years ago
Read 2 more answers
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