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
vlabodo [156]
3 years ago
12

A train travels 90 kilometers in 2 hours, and then 66 kilometers in 2 hours. What is its average speed?

Physics
1 answer:
Inessa05 [86]3 years ago
3 0
90+66=156
156/2=78

Reply:78kilometers in 2 hours.
You might be interested in
Can y’all help please
Ugo [173]

Answer:

advantages of using renewable energy resource

it is safer and cleaner

it does not produces green house gas and has 0 carbon emission

for producing electricity we use solar and wind power that does not harm the environment

advantages of using non renewable energy resource

they are abundant

they are affordable

easy to use

they are easily accessible and compatible

easy to store

5 0
3 years ago
5 What is the maximum speed at which a car round a curve of 25m radius on a level road if the coefficient of static friction bet
pshichka [43]

Hi there!

On a level road:

∑F = Ff (Force due to friction)

The net force is the centripetal force, so:

mv²/r = Ff

Rewrite the force due to friction:

mv²/r = μmg

Cancel out the mass:

v²/r = μg

Solve for v:

v = √rμg

v = √(25)(9.81)(0.8) = 14.01 m/s

8 0
2 years ago
A 0.18 m radius pulley is free to rotate about a horizontal axis. A mass and a mass are attached by a massless string, which is
Musya8 [376]

Answer:

T = 1.766(M-m) Nm where M and m are the 2 masses of the objects

Explanation:

Let m and M be the masses of the 2 objects and M > m so the system would produce torque and rotational motion on the pulley. Force of gravity that exert on each of the mass are mg and Mg. Since Mg > mg, the net force on the system is Mg - mg or g(M - m) toward the heavier mass.

Ignore friction and string mass, and let g = 9.81 m/s2, the net torque on the pulley is the product of net force and arm distance to the pivot point, which is pulley radius r = 0.18 m

T = Fr = g(M - m)0.18 = 0.18*9.81(M - m) = 1.766(M-m) Nm

8 0
3 years ago
______ clouds are formed when air masses rise vertically in the atmosphere.
zhannawk [14.2K]

a) Cumulus is 100% the correct answer

6 0
3 years ago
Read 2 more answers
First to answer will be the brainliest i need the answer ASAP
slavikrds [6]
The answer is chemical.
5 0
3 years ago
Other questions:
  • When writing a lab report where do your data tables belong?
    15·2 answers
  • The vertical velocity?
    11·1 answer
  • WILL GIVE BRAINLY!! A hippogriff is a large flying creature that Hagrid watches over at Hogwarts. If the Hippogriff’s mass is 12
    12·2 answers
  • If the speed of a car is increased by 80%, by what factor will its minimum braking distance be increased, assuming all else is t
    12·1 answer
  • Suppose a horizontal wind blows with a speed of 12.6 m/s outside a large pane of plate glass with dimensions 3.00 m x 1.80 m. As
    11·1 answer
  • Does anyone understand circuits?
    7·1 answer
  • A baseball with a mass of 0.125 kg is hit toward the pitcher at a speed of 45 m/s. The pitcher's glove stops the baseball in 0.0
    12·2 answers
  • Sharon is driving on a straight road. She is driving north, and her speed is
    6·1 answer
  • Un cubo de hielo de masa 500g a temperatura de -20°C, se introduce en un recipiente en el cual se mantiene la presión constante
    6·1 answer
  • Is the mass of an alpha particle greater than, less than, or equal to the mass of an electron?.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!