1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ArbitrLikvidat [17]
3 years ago
13

4) An object is dropped from rest. After 6 seconds, what is the velocity of the object?

Physics
1 answer:
vekshin13 years ago
8 0

Answer:

for question no.4,

time =6 secs

acceleration due to gravity (g)= 9.8 m/s^2

velocity=gt

=6×9.8

=58.8m ans...

for question no .5,

time taken = 4seconds

aacceleration due to gravity (g)=9.8 m/s^2

distance=12gt

=12×9.8×4

=470.4meter answer...

You might be interested in
What 2 things do you need to make sound? help ASAP
inessss [21]

Answer:

- A vibrating object

- a medium to travel

HOPE IT HELPS :)

PLEASE MARK IT THE BRAINLIEST!

8 0
4 years ago
What is the maximum wavelength of incident light that can produce photoelectrons from silver? The work function for silver is Φ=
Oksi-84 [34.3K]

Answer:

The maximum wavelength of incident light that can produce photoelectrons from silver is 423.5 nm.

Explanation:

Given;

work function of silver, Φ = 2.93 eV = 2.93 x 1.602 x 10⁻¹⁹ J = 4.6939 x 10⁻¹⁹ J

Apply Einstein Photo electric effect;

E = K.E + Ф

Where;

E is the energy of the incident light

K.E is the kinetic of electron

Ф is the work function of silver surface

For the incident light to have maximum wavelength, the kinetic energy of the electron will be zero.

E = Ф

hf = Ф

h\frac{c}{\lambda} = \phi

where;

c is speed of light = 3 x 10⁸ m/s

h is Planck's constant, = 6.626 x 10⁻³⁴ J/s

λ is the wavelength of the incident light

\lambda = \frac{hc}{\phi}\\\\\lambda =\frac{6.626*10^{-34} *3*10^8}{4.6939*10^{-19}} \\\\\lambda = 4.235 *10^{-7} \ m\\\\\lambda = 423.5 *10^{-9} \ m\\\\\lambda = 423.5 \ nm

Therefore, the maximum wavelength of incident light that can produce photoelectrons from silver is 423.5 nm.

8 0
3 years ago
What is unit of pressure?why is it called a derived unit ? give reasons​
olga55 [171]

pascal is the unit of pressure

The units of pressure is called derived units because it is simply derived from base unit which is distance and a derived unit which is force, which is derived from acceleration, a derived unit as well, and mass, a base unit. As we all know, work is defined as the force x distance. Thus making work a derived unit.Jun 23, 2020

7 0
3 years ago
What is the overall moment?
Setler79 [48]
A moment causes a rotation about or axis. If the moment is to be taken about a point due to a force F, then in order for a moment to develop, the line of action cannot pass through that point...... the total moment was zero because the moment arm was zero as well
3 0
3 years ago
(a) A hole of 1 cm in diameter is drilled in a plate of steel at 20°C. What happens to the diameter of the hole as the steel is
Anestetic [448]

When heat is applied to a substance/material or steel in our case, a series of changes will occur, one of which is Expansion.

Hence the hole will expand from 1cm to a diameter that is greater.

Thermal expansion refers to the expansion or contraction of the dimensions of the solid, liquid or gas when their temperature is changed.

<h3>Types of Expansion</h3>
  • Linear expansion
  • Areal expansion and
  • Volumetric volume.

Learn more about expansion here:

brainly.com/question/1166774

8 0
3 years ago
Other questions:
  • A proton with kinetic energy of 1.16×105 eV is fired perpendicular to the face of a large plate that has a uniform charge densit
    13·1 answer
  • A stone is thrown from the top of a building with an initial velocity of 20 m/s downward. The top of the building is 60 m above
    5·1 answer
  • An object is moving north at a constant speed. A force of 5 N begins to push the object easy at the same moment that a force of
    9·1 answer
  • Since illness can be caused by bacteria that live in water, pollution in water can lead to serious illness. true or false
    8·1 answer
  • Ls are used to analyze large unstructured data sets, such as e-mail, memos, survey responses, etc., to discover patterns and rel
    11·1 answer
  • What does standard deviation of a set of data tell you?
    8·2 answers
  • CHOSE TWO <br> PLZ HELP I WILL GIVE BRAINLEST
    13·2 answers
  • Determine the identity of a cube of metal that measures 1.2
    7·1 answer
  • An electromagnet is a coil of wire with a current running through it. this creates an electromagnetic field. an additional magne
    11·1 answer
  • d. e. Study the given diagram and calculate the following: i. work done by load ii. work done by effort iii. M.A iv. V.R v. effi
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!