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
Advocard [28]
2 years ago
11

. Calculate the time take and the distance covered by a train moving with a velocity of 15 m/s to accelerate uniformly at the ra

te of 2 m/s^2 to reach a velocity of 20 m/s.
Physics
1 answer:
Oksi-84 [34.3K]2 years ago
6 0

Answer:

a = (V2 - V1) / t     for uniform acceleration

t = (20 - 15/ m/s / 2 m/s^2 = 2.5 s

S = V1 t + 1/2 a t^2     distance covered

S = 15 * 2.5 + 2 / 2 * 2.5^2 = 37.5 +  2.5*2

S = 37.5 + 6.25 = 43.75 m

You might be interested in
Light travels approximately 982,080,000 ft/s, and one year has approximately 32,000,000 seconds. A light year is the distance li
diamong [38]

So to solve this problem, we must convert units and then cancel units simultaneously:

(\frac{982,080,000ft}{s})*(\frac{32,000,000s}{1})*(\frac{12inches}{1ft})=3.77x10^{17} inches

Therefore we know that the distance that light travels in one year is 3.77x10^{17} inches.

7 0
4 years ago
A sample of gas is enclosed in a container of fixed volume. Identify which of the following statements are true. Check all that
motikmotik

Answer:

B. If the container is cooled, the gas particles will lose kinetic energy and temperature will decrease.

C. If the gas particles move more quickly, they will collide more frequently with the walls of the container and pressure will increase.

E. If the gas particles move more quickly, they will collide with the walls of the container more often and with more force, and pressure will increase.

#FreeMelvin

7 0
4 years ago
Tectonic plates often shift position by the force of liquid rock emerging from below the Earth’s surface and then cooling to for
PSYCHO15rus [73]
D.On the ocean floor. When tectonic plates move, They move along the ocean floor, which is the crust, and It causes earthquakes and volcanoes and also caused Pangea to break apart and become what it is now The seven continents.

5 0
4 years ago
Read 2 more answers
How you do this resistor in circuit question?
lawyer [7]
If Resistors are in series= The equivalent is the sum.

E.g R1 and R2 in series,  R = R1 + R2.

If in Parallel, equivalent is Product/sum.

E.g If R1 and R2 in parallel,  R = (R1*R2)/(R1+R2)

1.)    60 is parallel with 40 and both are then in series with 20.

60//40   = (60*40)/(60+40) = 2400/100 = 24 

Now the 24 is in series with the 20 

R = 24 + 20 = 44 ohms.

2.)    80 is in series with 40 and both are then in parallel with 40.

Solving the series,  R = 80 + 40 =120.

Parallel:   120//40  =     (120*40)/(120+40) =  4800/160 = 30 
Equivalent Resistance = 30 ohms.

3.) 100 is in parallel with 100 and both are then in series with the parallel of 50 and 50.

The 1st parallel  =  (100*100)/(100+100) = 10000/200 = 50

The 2nd parallel  =  (50*50)/(50+50)  = 2500/100   = 25.

Solving the series  = 50 + 25 =75 ohms.

Cheers.
3 0
4 years ago
What distinguishes a tornado watch from a tornado warning?
tankabanditka [31]
"Watch" . . . atmospheric conditions exist that could
produce tornados, but none have been seen yet.

"Warning" . . . tornados have formed and have been seen.
6 0
3 years ago
Read 2 more answers
Other questions:
  • I need help with these Physics problems​
    5·1 answer
  • As a woman carries her suitcase up a flight of stairs, she does work against gravity. If the mass of her suitcase is 25 kg and t
    10·1 answer
  • Rank in order the following according to their speeds, from fastest to slowest: (i) 425-nm-wavelength light through a pane of gl
    8·1 answer
  • What do you need to calculate the mechanical advantage of a block and tackle? A.resistance force
    12·2 answers
  • Noah drops a rock with a density of 1.73 g/cm cubes into a pond. Will the rock float or sink? Explain your answer.
    10·1 answer
  • A 4.5 kg box slides down a 4.3-m-high frictionless hill, starting from rest, across a 2.0-m-wide horizontal surface, then hits a
    7·1 answer
  • A single-slit diffraction pattern is formed on a distant screen. If the width of the single slit through which light passes is r
    12·1 answer
  • If your mass is 60 kg on earth, what would your mass be on the moon?
    14·1 answer
  • A student solving a physics problem to find the unknown has applied physics principles and obtained the expression: μkmgcosθ=mgs
    11·1 answer
  • If a waves frequency is 4Hz, and its wavelength is 5 m, then what is its speed?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!