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3 years ago

What statement best defines work?

2 answers:

8 0

The correct answer is C.
W=force into distance.

Option B states that "balanced forces act on on object and cause movement in direction of these force" which is against the laws of physics.
Option A is wrong because work is the product of force into distance,its not time.
Option D says that work is distance over time,which is wrong as:
speed=distance/time
So your left with option C

GenaCL600 [577]3 years ago

6 0

I think the answer is C

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Someone help please 1 You are cycling along a flat road. a Are you moving up or down? b What is the force that is pulling you

9966 [12]

Answer:

$\gamma \: 1a. \: i \: am \: moving \: downwards \: . \\ b. \: gravity \: is \: pulling \: me \: downwards \: \\ c. \: the \: force \: is \: acting \: downwards \: \\ the \: answer \: to \: the \: question \: c \: is \: downwars \: because \: its \: easy \: to \: pull \: the \: bike \: downwards \: but \: its \: hard \: to \: pull \: the \: bike \: upwards \: it \: would \: take \: more \: energy \: \gamma \\ \\$

Explanation:

<h3> $\infty \infty \: hope \: it \: helps \: you \: \\ have \: a \: good \: a \: day \: .$ </h3>

Slide my answer to see the full answer .

7 0

3 years ago

When photons with a wavelength of 310. nm strike a magnesium plate, the maximum velocity of the ejected electrons is 3.45 105 m/

Kisachek [45]

This problem can be solved based on the rule of energy conservation, as the energy of the photon covers both the energy needed to overcome the binding energy as well as the energy of ejection.

The rule can be written as follows:
energy of photon = binding energy + kinetic energy of ejectection
(hc) / lambda = E + 0.5 x m x v^2 where:
h is plank's constant = 6.63 x 10^-34 m^2 kg / s
c is the speed of light = 3 x 10^8 m/sec
lambda is the wavelength = 310 nm
E is the required binding energy
m is the mass of photon = 9.11 x 10^-31 kg
v is the velocity = 3.45 x 10^5 m/s

So, as you can see, all the parameters in the equation are given except for E. Substitute to get the required E as follows:
(6.63x10^-34x3x10^8)/(310x10^-9) = E + 0.5(9.11 x 10^-31)(3.45x10^5)^2
E = 6.41 x 10^-16 joule

To get the E in ev, just divide the value in joules by 1.6 x 10^-19
E = 4.009 ev

3 0

3 years ago

Please use mesosphere in a sentence

RideAnS [48]

The coldest part of the atmosphere is the mesosphere

8 0

3 years ago

Read 2 more answers

An electron is accelerated through 2.40×10³V from rest and then enters a uniform 1.70-T magnetic field. What are(b) the minimum

Korolek [52]

The maximum value of Force is 7.88x $10^{-12}$

The minimum value of magnetic force is 0

Potential V=2.40x $10^{3}$ .

Magnetic field = B = 1.70 T.

we need to find

a) The maximum value of Force

Since the particle is moving from rest, the potential energy change is 2.40x $10^{3}$ ?

Potential Energy= vq= 2,40x $10^{3}$ x (-1.6 x 10x $10^{-19}$ %).

= -8.84x $10^{-16}$

Now this will be equal to 1/2 mv²

= 1/2 mv²= 8.84x $10^{-16}$ .

v=2.903x $10^{7}$ m/s :

Wow Fmax = qvb

=1.6x $10^{-19}$ x2.903x $10^{7}$ x1.70 .

=7.88x $10^{-12}$

b) The minimum value of magnetic force

The minimum Value of magnetic force will be

when sinθ=0

The minimum value is 0

To know more about magnetic field refer to brainly.com/question/13091447

#SPJ4

5 0

2 years ago

Use the concept of potential energy to describe how a covalent bond

Nitella [24]

Use the concept of potential energy to describe how a covalent bond forms between two atoms. When two atoms get close and begin to form a covalent bond, the electrons and the protons have a stronger attraction than the like force's (electrons and electrons, protons and protons) repulsion.

8 0

3 years ago