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
GREYUIT [131]
3 years ago
13

A train is accelerating at a rate of 2.0 km/hr squared. If it’s initial velocity is 20 km/hr, what is its velocity after 30 seco

nds?
Mathematics
1 answer:
tangare [24]3 years ago
4 0

Answer: 30

Step-by-step explanation:

You might be interested in
4/7 x ? = 16<br><br> Can someone please explain step by step to get marked as brainliest
Len [333]

Answer:

28

Step-by-step explanation:

4 / 7 * x = 16

4 * x = 16 * 7

x = 4 * 7

x = 28

8 0
2 years ago
Read 2 more answers
What percent of 80 is 48?
seraphim [82]
41.6 I believe. If my calculations are correct that should be the answer.
7 0
3 years ago
Read 2 more answers
What is the length of line segment S T if S is at -5,-1 and T is at -1,12? Round to the nearest hundredth.
GuDViN [60]
Distance formula : d = sqrt (x2 - x1)^2 + (y2 - y1)^2
(-5,-1)(-1,12)

d = sqrt (-1-(-5)^2 + (12 - (-1)^2
d = sqrt (-1 + 5)^2 + (12 + 1)^2
d = sqrt (4^2) + (13^2)
d = sqrt (16 + 169)
d = sqrt 185
d = 13.60 <==
4 0
3 years ago
Indicate the number divisible by 3 and 5 simultaneously<br> a) 715<br> b)220<br> c)255<br> d)369
koban [17]

Answer:

c) 255

Step-by-step explanation:

d isn't divisible by 5 and both a and b aren't divisible by 3

3 0
3 years ago
Read 2 more answers
A student wants to determine the coefficients of static friction and kinetic friction between a box and a plank. She places the
Arturiano [62]

Answer:

the coefficients of static friction is 0.577

the coefficients of fkinetic friction is 0.54

Step-by-step explanation:

given information

θ = 30°

S = 2.5 m

t = 4 s

- Static friction

F - F(friction) = 0

W sin θ = μs W cos θ  

μs = sin θ/ cosθ

   = tan θ

   = tan 30°

   = 0.577

- kinetic friction

S = v_{0} t + \frac{1}{2} at^{2}

v_{0} t = 0

S = \frac{1}{2} at^{2}

a = \frac{2S}{T^{2} } = \frac{2 x 2.5}{4^{2} }

  = 0.3 m/s^{2}

F - F(friction) = m a

W sin θ - μ W cos θ  = m a

mg sin θ - μk mg cos θ  = m a

g sin θ - μk g cos θ  = a

μk = g sin θ  - a / g cos θ

    = 9.8 sin 30° - 0.3 / 9.8 cos 30°

    = 0.54

7 0
3 years ago
Other questions:
  • Joe wants to earn at least $67 trimming trees. he charges $8 per hour and pays $5 in equipment fees. what are the possible numbe
    8·2 answers
  • Explain​ how, in​ general, riemann sum approximations to the area of a region under a curve change as the number of subintervals
    10·1 answer
  • Amina posts three large letters the postage is the same for each letter she pays with a £20 note her change is £14.96 what is th
    14·2 answers
  • 100^a x 1000^b can be written in the form 10^w <br><br> Show that w = 2a + 3b
    5·1 answer
  • Match the missing angle measurements to diagram
    5·1 answer
  • Three Friends all have ages that are consecutive integers. The sum of their ages is 48. What is the age of the oldest friend?
    8·2 answers
  • Help this is due tommorow!!<br>I just need to find quadrant 1 and 3 for that set of numbers! ​
    6·1 answer
  • Solving Linear Inequalities<br><br> can someone help me know how to this please
    15·2 answers
  • Find the equation of the line that contains the given point and has the given slope.P(−1, 7), m = −3
    11·1 answer
  • HELP MEE ,25 POINTS !!!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!