Can the distance coverd by a body ever be negative? What about its distance and displacement

Jack pushed and pushed, but no matter how hard he tried, the refrigerator would not budge! What is the BEST explanation of what

Brrunno [24]

The answer would be C.

Hope this helps.☺

6 0

3 years ago

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The human eye is most sensitive to green light of wavelength 505 nm . Experiments have found that when people are kept in a dark

liq [111]

1. $5.94\cdot 10^{14} Hz$

The frequency of a photon is given by:

$f=\frac{c}{\lambda}$

where

c is the speed of light

$\lambda$ is the wavelength

The wavelength of the photon in this problem is

$\lambda=505 nm=5.05\cdot 10^{-7}m$

So, the frequency of the photon is

$f=\frac{3\cdot 10^8 m/s}{5.05\cdot 10^{-7} m}=5.94\cdot 10^{14} Hz$

2. $3.94\cdot 10^{-19}J, 2.46 eV$

The energy of a photon is given by

$E=hf$

where

h is the Planck constant

f is the frequency of the photon

The frequency of the photon in this problem is

$f=5.94\cdot 10^{14} Hz$

so its energy in Joules is

$E=(6.63\cdot 10^{-34}Js)(5.94\cdot 10^{14}Hz)=3.94\cdot 10^{-19}J$

And since

$1 eV = 1.6\cdot 10^{-19}J$

The energy in eV is

$E=\frac{3.94\cdot 10^{-19} J}{1.6\cdot 10^{-19}J/eV}=2.46 eV$

7 0

3 years ago

A positive rod is placed to the left of sphere A ,and the spheres are separated

Romashka [77]

When a positive rod is placed to the right of sphere B, and the spheres are separated, the reason behind this is the same charge on the sphere as the rod i.e. the right of the sphere also had a positive charge. Thus, the same positive charges could not reside on the right side surface of the sphere due to which it separation happens.

Read more on Brainly.com - brainly.com/question/4135790#readmore

5 0

3 years ago

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The particles in a balloon push out on the sides of the balloon. What is the reaction force?

saul85 [17]

The balloon wall pushes the enosed air particles inwards.

7 0

2 years ago

A boy whirls a ball on a string in a horizontal circle of radius 0.65 m. If the ball is traveling at 9 m/s, what is the centripe

djverab [1.8K]

Answer:

ac = 124.6 m/s²

Explanation:

When an object executes a uniform circular motion, acceleration is produced in it due to a change in its direction during the motion. This acceleration is called the centripetal acceleration. The formula used to find this acceleration is given as follows:

$a_{c} = \frac{v^{2}}{r}\\$

where,

ac = centripetal acceleration = ?

v = speed = 9 m/s

r = radius = 0.65 m

Therefore,

$a_{c} = \frac{(9\ m/s)^{2}}{0.65\ m}\\$

5 0

3 years ago

Can the distance coverd by a body ever be negative? What about its distance and displacement​

Can the distance coverd by a body ever be negative? What about its distance and displacement