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
9966 [12]
3 years ago
14

A parked car begins to roll down a hill, what can you conclude from that observation?

Physics
1 answer:
Fynjy0 [20]3 years ago
3 0

Answer:

its The rolling friction is greater than the force of the car’s weight against the hill.

and A force was required to start the car rolling.

Explanation:

You might be interested in
A electric heater that draws 13.5 a of dc current has been left on for 10 min. how many electrons that have passed through the h
kicyunya [14]
By definition, Ampere is a unit of current which is a measure of the amount of charge passing through a point in a circuit per unit  of time, with an equivalent charge of 1.602 x 10^(-19) Coulomb per electron. To determine the number of electrons passing through the heater, we use the definition of the current. We calculate as follows:

13.5 A = 13.5 C per second
Charge = 13.5 C/s (10 min) ( 60 s / 1 min)
Charge = 8100 C 

Number of electrons = 8100 C / 1.602 x 10^(-19) C per electron
Number of electrons = 5.1 x 10^22 electrons

Therefore, there are 5.1 x10^22 electrons that assed through the heater for 10 minutes.
3 0
3 years ago
A wave traveling in a string has a wavelength of 35 cm, an amplitude of 8. 4 cm, and a period of 1. 2 s. What is the speed of th
AlekseyPX

0.29 m/s (wave velocity = wavelength (lamda)/period (T) in metres)

35 / 1.2 = 29.16

29.16 ÷ 100 = 0.29

Wave velocity in string:

The properties of the medium affect the wave's velocity in a string. For instance, if a thin guitar string is vibrated while a thick rope is not, the guitar string's waves will move more quickly. As a result, the linear densities of the two strings affect the string's velocity. Linear density is defined as the mass per unit length.

Instead of the sinusoidal wave, a single symmetrical pulse is taken into consideration in order to comprehend how the linear mass density and tension will affect the wave's speed on the string.

Learn more about density here:

brainly.com/question/15164682

#SPJ4

3 0
2 years ago
Friends Burt and Ernie stand at opposite ends of a uniform log that is floating in a lake. The log is 3.0 m long and has mass 20
Taya2010 [7]

Answer:

The distance the log has moved by the time Ernie reaches Bur is 1.33 m.

Explanation:

give information:

The log is 3.0 m long and has mass 20.0 kg.

Burt has mass 30.0 kg; Ernie has mass 40.0 kg

Ernie has mass 40.0 kg.

to find the distance, first, we have to calculate the center of mass

X = ∑ m x /∑m

   = (20 x (3/2)) + (30 x 0) + (40 x 3)/ (20+30+40)

   = 150/90

   = 5/3

when Ernie walk, the center of the mass is

X = (70 x 0) + (20 x (3/2))/(70 + 20)

  = 30/90

  = 1/3

the distance of log moved = 5/3 - 4/3 = 1.33 m

5 0
3 years ago
There are infinite black and white dots on a plane. Prove that the distance between one black dot and one white dot is one unit.
OlgaM077 [116]

Answer:this is confusing and what subject is this

Explanation:

6 0
3 years ago
Read 2 more answers
During nuclear decay, a new isotope is created. How is the nucleus of the new isotope different from the parent if the parent is
STALIN [3.7K]

Answer:

Alpha decay will produce a daughter nucleus with more protons and beta decay will produce a daughter nucleus with fewer protons than the parent nucleus has.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Is there 1,000 more milky way in the galaxy???If it is true is there life also?
    11·2 answers
  • What property or properties of a wave determine it's speed?
    5·1 answer
  • Electric potential is associated with both electric fields due to static charges and induced electric fields. Electric potential
    9·1 answer
  • If the Sun subtends a solid angle Ω on the sky, and the flux from the Sun just above the Earth’s atmosphere, integrated over all
    8·1 answer
  • What rapid changes to earths surface are caused by shifting plates
    7·1 answer
  • Calculate the gravity field at the surface of the Sun.
    15·1 answer
  • If an EM wave has a wavelength of 400nm,what is its frequency? What kind of wave is it?
    10·2 answers
  • Another one! Your kind of gonna need it.
    11·2 answers
  • An upright spring with a 96g mass on it is compressed 2 cm. When
    10·1 answer
  • 4. A 180 kg sumo wrestler on roller skates, rolling at 5 m/s to the left, collides elastically with
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!