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
Neko [114]
3 years ago
11

PLEASE HELP WILL NAME BRAINLIEST!! An object is dropped from rest. What is its instantaneous speed when it has been in motion fo

r 4 s? The acceleration of gravity is 9.8 m/s^2 Answer in units of m/s.
Physics
1 answer:
frosja888 [35]3 years ago
3 0

Explanation:

Using kinematics,

t = 4s

u = 0m/s

a = 9.8m/s^2

Therefore v = u + at = 0 + (4)(9.8) = 39.2m/s.

You might be interested in
Consider a sample of helium gas in a container fitted with a piston, as pictured below. The piston is frictionless, but has a ma
andrezito [222]

Question:

Consider a sample of helium gas in a container fitted with a piston as pictured below. The piston is frictionless, but has a mass of 10.0 kg. How many of the following processes will cause the piston to move away from the base and decrease the pressure of the gas? Assume ideal behavior.

I. Heating the helium. II.

II. toRemoving some of the helium from the container.

III. Turning the container on its side.

IV. Decreasing the pressure outside the container.

a) 0

b) 1

c) 2

d) 3

e) 4

Answer:

Only one process will cause the piston to move which is

i) Heating the helium

Explanation:

When helium is heated it becomes less dense or lighter. Heating the helium will cause an increase in volume which will make the piston to move away from the base. When the volume finishes increasing, the piston will stop moving which in turn will make the forces on both sides of the piston balanced, so the pressure inside will balance the weight of the piston and that of the atmosphere. From that we can see that there has been a pressure change as a result of heating.

6 0
3 years ago
Read 2 more answers
An electron in a(n) __________ subshell experiences the greatest effective nuclear charge in a many-electron atom.
bixtya [17]
The electrons float around in an outer sub shell
6 0
3 years ago
4. Three methods that people use are:
Mila [183]
The answers to question 4 d
6 0
2 years ago
Wave traveling at 330 m/sec has a wavelength of 4.3 meters. What is the frequency of this wave?
Rasek [7]

Answer:

76.74 Hz

Explanation:

Given:

Wave velocity ( v ) = 330 m / sec

wavelength ( λ ) = 4.3 m

We have to calculate Frequency ( f ):

We know:

v = λ / t [ f = 1 / t ]

v = λ f

= > f = v / λ

Putting values here we get:

= > f = 330 / 4.3 Hz

= > f = 3300 / 43 Hz

= > f = 76.74 Hz

Hence, frequency of sound is 76.74 Hz.

6 0
2 years ago
With the switch closed, how does the voltage across the 20-ω resistor compare to the voltage across the 10-ω resistor?
jasenka [17]
In electricity, the most famous and basic equation is the Ohm's Law which relates the parameters voltage, current and resistance. One form of this law as written in equation is V = IR, where V is the voltage in volts, I is the current in amperes and R is the resistance in ohms. These parameters depends in the arrangements, whether it's series or parallel.

In a series connection, the voltage is greater across a high-resistance resistor. Therefore, the voltage is much greater for the 20-ohm resistor. However,if it is a parallel circuit, the voltage is just the same for both resistors.
5 0
3 years ago
Other questions:
  • Every substance has a specific value of heat required to change the temperature of 1 gram of the substance by 1 degree Celsius.
    6·1 answer
  • The surface tension of water was determuned in a laboratory by using the drop weight method. 100 drops were released from a bure
    10·1 answer
  • A capacitor has plates of area 8.25 * 10 ^ - 5 m ^ 2 . To create a capacitance of 3.35*10^ -10 F , how far apart should the plat
    8·1 answer
  • For your senior project, you are designing a Geiger tube for detecting radiation in the nuclear physics laboratory. This instrum
    13·1 answer
  • A car moves from a position 50 m south of the library to a new position 250
    15·1 answer
  • What is marrow??????????????????????????
    9·2 answers
  • Why do people get sunburned by UV light ?
    6·1 answer
  • Elizabeth was a brilliant lawyer until she began hearing voices and seeing things that are not there. She also has trouble with
    5·2 answers
  • What is the displacement of a car traveling 14 km North on I985 then 20 km South on I985?
    8·1 answer
  • Auto companies frequently test the safety of automobiles by putting themthrough crash tests to observe the integrity of the pass
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!