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
vivado [14]
3 years ago
15

If the distance travelled by a train is 495 km in 4 hours 30 minutes, what is its speed

Physics
2 answers:
Rainbow [258]3 years ago
4 0

Answer:

speed = distance / time

Explanation:

speed = 495 km /4.5 hours

=110 km /h

ryzh [129]3 years ago
4 0

We don't know what its actual speed was at any moment during that time.

But its AVERAGE speed over the whole 495 km was (495 km)/(4.5 hr) = 110 km//hr.

You might be interested in
A watermelon is dropped from the top of a 80m tall building. We want to find the velocity of the watermelon after it falls for 1
White raven [17]

Answer:

v_f = v_i + at

v_f = 13.23 m/s

Explanation:

Height Of the watermelon when it is dropped is given as

h = 80 m

time of fall under gravity

t = 1.35 s

now if water melon start from rest then we have

v_i = 0

acceleration due to gravity for watermelon

a = 9.81 m/s^2

now we need to find the final speed of watermelon

v_f = v_i + at

so we will have

v_f = 0 + (9.81)(1.35)

v_f = 13.23 m/s

7 0
4 years ago
Why does magma rise from depth to the surface of the earth?
Viefleur [7K]

Answer

Magma is less dense compared to the surrounding rock.

the overlying rock creates pressure which forces the magma to be directed upward.

Explanation:

at high temperatures the magma is liquid form with the high energy which causes the formation of bonds and the pressure build up creates the increase  channeling of the liquid.as the temperature decreases the magma moves into the surface

6 0
3 years ago
Read 2 more answers
The acceleration due to gravity is lower on the Moon than on Earth. Which of the following is true about the mass and weight of
Naya [18.7K]

Mass is the same, weight is less

<h3>What is the Weight and mass on Moon ?</h3>

As we know that the mass of the object is the measurement of the quantity of the matter that is present in it

So here we can say that if the mass of the object is m then its total quantity of the matter that is present in it is given as

mass = (density) × (volume)

Now for the weight of the object is defined as the force of gravity due to planet

Fg = mg

so the weight of the object is depending on the acceleration due to gravity of the planet

As we know that the gravity of moon is smaller than the gravity of the earth so here weight on the moon will be smaller than the weight on the Earth

Learn more about Weight on Moon here:

brainly.com/question/4080619

#SPJ4

3 0
2 years ago
At the end of the adiabatic expansion, the gas fills a new volume V₁, where V₁ &gt; V₀. Find W, the work done by the gas on the
tino4ka555 [31]

Answer:

W=\frac{p_0V_0-p_1V_1}{\gamma-1}

Explanation:

An adiabatic process refers to one where there is no exchange of heat.

The equation of state of an adiabatic process is given by,

pV^{\gamma}=k

where,

p = pressure

V = volume

\gamma=\frac{C_p}{C_V}

k = constant

Therefore, work done by the gas during expansion is,

W=\int\limits^{V_1}_{V_0} {p} \, dV

=k\int\limits^{V_1}_{V_0} {V^{-\gamma}} \, dV

=\frac{k}{\gamma -1} (V_0^{1-\gamma}-V_1^{1-\gamma})\\

(using pV^{\gamma}=k )

=\frac{p_0V_0-p_1V_1}{\gamma-1}

4 0
3 years ago
A woman falls to the ground while wearing a parachute. The air resistance of the parachute is 500N. If the woman falls at a cons
alina1380 [7]

the answer is less than 500 n

6 0
3 years ago
Other questions:
  • A 35 g steel ball is held by a ceiling-mounted electromagnet 4.0 m above the floor. A compressed-air cannon sits on the floor, 4
    10·1 answer
  • A portion of the atmosphere that becomes warmer than surrounding air will ____.
    6·1 answer
  • A blue ball is thrown upward with an initial speed of 21.8 m/s, from a height of 0.9 meters above the ground. 2.7 seconds after
    9·1 answer
  • Write the equation of the line that has an undefined slope and passes through the point (4, 7). User: What is the slope of a lin
    5·2 answers
  • PLEASE HELP ME
    13·2 answers
  • Two positive charged particles will ?
    5·2 answers
  • An object with more mass has more kinetic energy than an object with less mass, if both objects are moving ____.
    10·2 answers
  • A uniform electric field of magnitude 144 kV/m is directed upward in a region of space. A uniform magnetic field of magnitude 0.
    10·1 answer
  • Help me plzzzzz<br> Will give Brainlyest
    11·1 answer
  • To test the hypothesis that the population mean mu=3. 6, a sample size n=14 yields a sample mean 4. 007 and sample standard devi
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!