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
DedPeter [7]
3 years ago
11

A train Traveled from hong kong to beijing. It traveled at an average speed of 160 km/h in the first four hours. After that, it

traveled at another average speed of 180 km/h. If the distance between hong kong to beijing is 1180 km, what was the total time for the whole journey
Physics
1 answer:
4vir4ik [10]3 years ago
3 0
The answer is 7 hours
You might be interested in
Meteorology is BEST defined as
alexgriva [62]
It is the branch of science, in which we study different phenomena of atmosphere including climate and weather.
5 0
3 years ago
Read 2 more answers
HELPPPPP!!!!!
leva [86]

Answer:

Option C

Maximum potential energy is at point R.

Explanation:

Potential energy is a product of mass, acceleration due to gravity and height ie

PE=mgh where PE is the potential energy, m is mass of an object, g is acceleration due to gravity whose value is normally taken as 9.81 and h is height. Since at point R we have the maximum height, the potential energy will be highest at this point.

3 0
4 years ago
In which situation is a person doing work on an object?
Marianna [84]

Answer : When a person applies force and covers distance then the person is doing work on an object.

6 0
3 years ago
Read 2 more answers
The unit used to measure electric current is the ampere (A). Now, assume that the current delivered at a wall socket reaches the
pav-90 [236]

Answer:

T = 0.017s

Explanation:

period is the time it takes a particle to make one oscillation

An electric current is periodic in nature

The current reaches 3.8A  ten times.  

So there must have been 10 cycles (10 periods) in 0.17s.   let 'T'  be the period:

T=\frac{t}{n}

t is the total time interval

n is the number of oscillations

T=\frac{0.17}{10}

10T = 0.17

T = 0.17/10 = 0.017s

8 0
3 years ago
A pendulum consists of a large balanced mass hanging on the end of a long wire. At the point where a 28-kg pendulum has the grea
Ray Of Light [21]

Answer:

The length of the wire is approximately 67.1 m

Explanation:

The parameters of the pendulum are;

The mass of the pendulum, m = 28 kg

The angle between the pendulum weight and the wire, θ = 89°

The magnitude of the torque exerted by the pendulum's weight, τ = 1.84 × 10⁴ N·m

We have;

Torque, τ = F·L·sinθ = m·g·l·sinθ

Where;

F = The applies force = The weight of the pendulum = m·g

g = The acceleration due to gravity ≈ 9.8 m/s²

l = The length of the wire

Plugging in the values of the variables gives;

1.84 × 10⁴ N·m = 28 kg × 9.8 m/s² × l × sin(89°)

Therefore;

l = 1.84 × 10⁴ N·m/(28 kg × 9.8 m/s² ×  sin(89°)) = 67.0656080029 m ≈ 67.1 m

The length of the wire, l ≈ 67.1 m

6 0
3 years ago
Other questions:
  • As the distance between two objects increases, the gravitational force of attraction between them will
    12·1 answer
  • If 1495 j of heat is needed to raise the temperature of a 351 g sample of a metal from 55.0°c to 66.0°c, what is the specific he
    11·2 answers
  • Older railroad tracks in the U.S. are made of 12-m-long pieces of steel. When the tracks are laid, gaps are left between section
    7·2 answers
  • Why does pressure change with elevation and depth?
    6·2 answers
  • . Two buses depart from Chicago, one going to New York and one to San Francisco. Each bus travels at a speed of 30 m/s. Do they
    12·1 answer
  • What statement about the greenhouse effect is not true?
    15·1 answer
  • The_____is the time it takes for a wave to complete one cycle​
    13·1 answer
  • A 52.0-kg sandbag falls off a rooftop that is 22.0 m above the ground. The collision between the sandbag and the ground lasts fo
    7·1 answer
  • 35) Kinetic energy in flowing water drives
    11·1 answer
  • which part of the microscope will be used first to adjust the focus when starting with the lowest power lens?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!