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
Ulleksa [173]
3 years ago
9

a car travelling at 50km/h from rest covers a distance of 10km in 40minutes. Calculate the acceleration​

Physics
1 answer:
Margarita [4]3 years ago
7 0

Answer:

9.67\cdot 10^{-3}m/s^2

Explanation:

We can solve the problem by using the following suvat equation:

v^2-u^2=2as

where

v is the final velocity

u is the initial velocity

a is the acceleration

s is the displacement

For the car in this problem:

u = 0 (it starts from rest)

v=50 km/h \cdot \frac{1000}{3600}=13.9 m/s is the final velocity

s = 10 km = 10 000 m is the displacement

Solving for a, we find:

a=\frac{v^2-u^2}{2s}=\frac{13.9^2}{2(10000)}=9.67\cdot 10^{-3}m/s^2

You might be interested in
Course Task
kaheart [24]

Answer:

gravity effects only the mass of an object

Explanation:

an acorn is heavier that a stick and it's round shape gives it less wind resistance so gravity pulls it down faster. A stick vertical has little wind resistance but when rotated to when it is horizontal it has more resistance so it slows down but the the force of gravity is still as strong. A leaf has very little mass and it's shape provideds lots of wind resistance so it falls slower. The moon is not only effected by the earth's gravity it is also effected by the suns. It has its own gravity as well. with all these factors it stays in place and moves with the earth.

4 0
3 years ago
Hay represents two-dimensional motion
GREYUIT [131]

If a body is moving from left to right or right to left it is linear motion in x- direction. It is also called one dimensional motion.

If a body is moving up to down or down to up it is linear motion in y- direction. It is also called one dimensional motion.

But if a body is moving forward as well as downward it travels in X direction and in y direction at the same time. Such a motion is called two dimensional motion.

E.g motion of a ball.

Attachment shows path of two dimensional motion of a ball.

8 0
4 years ago
I need help with question two
zaharov [31]
I can't see numbers here, so here are all the answers:
1) the frequency is c/λ = 3e8/556e-9 = 5.39e14Hz
2) light travels at <span>299,792,458 m/s.  So in nanoseconds it's 0.299792458m.  This is about 1/3 of a meter which is about one foot.
3) length is L = ct = (</span>299,792,458 m/s)(6e-15) = 1.799e-6m or 1.799μm

6 0
3 years ago
El monoxido de carbono reacciona con el hidrogeno gaseoso para producir metanol (ch3oh) calcule el reactivo limite y el reactivo
Orlov [11]

Answer:

Se obtienen 2,27 gramos de metanol.

Explanation:

La reacción entre monóxido de carbono e hidrógeno para producir metanol es la siguiente:

CO + 2H₂ → CH₃OH  

Para encontrar el reactivo limitante y el reactivo en exceso, debemos calcular el número de moles de CO y H₂:

\eta_{CO} = \frac{m}{M}              

En donde:    

m: es la masa

M: es el peso molecular  

\eta_{CO} = \frac{m}{M_{CO}} = \frac{2,0 g}{28,01 g/mol} = 0,071 moles

\eta_{H_{2}} = \frac{2,0 g}{2,02 g/mol} = 0,99 moles

Dado que la relación estequiométrica entre CO y H₂ es 1:2, el número de moles de hidrógeno gaseoso que reaccionan con el monóxido de carbono es:

\eta_{H_{2}} = \frac{2}{1}*0,071 = 0,142 moles      

Entonces, se necesitan 0,142 moles de H₂ para reaccionar con 0,071 moles de CO y debido a que se tienen más moles de H₂ (0,99 moles) entonces el reactivo limitante es CO y el reactivo en exceso es H₂.

Ahora podemos encontar la masa de metanol obtenida usando el reactivo limitante (CO) y sabiendo que la realcion estequiométrica entre CO y CH₃OH es 1:1.    

\eta_{CH_{3}OH} = \eta_{CO} = 0,071 moles

m = 0,071 moles*32,04 g/mol = 2,27 g

Por lo tanto, se obtienen 2,27 gramos de metanol.

Espero que te sea de utilidad!      

6 0
3 years ago
The practical limit to an electric field in air is about 3.00 × 10^6 N/C . Above this strength, sparking takes place because air
AleksAgata [21]

Answer:

(a) x=157 m

(b) No

Explanation:

Given Data

Mass of proton m=1.67×10⁻²⁷kg

Charge of proton e=1.6×10⁻¹⁹C

Electric field E=3.00×10⁶ N/C

Speed of light c=3×10⁸ m/s

For part (a) distance would proton travel

Apply the third equation of motion

(v_{f})^{2} =(v_{i})^{2}+2ax

In this case vi=0 m/s and vf=c

so

c^{2}=(0)^{2}+2ax\\  c^{2}=2ax\\x=\frac{c^{2} }{2a}

x=\frac{c^{2}}{2a}--------Equation (i)

From the electric force on proton

F=qE\\where\\ F=ma\\so\\ma=qE\\a=\frac{qE}{m}\\

put this a(acceleration) in Equation (i)

So

x=\frac{c^{2} }{2(qE/m)}\\ x=\frac{mc^{2}}{2qE} \\x=\frac{(1.67*10^{-27})*(3*10^{8})^{2}  }{2*(1.6*10^{-19})*(3*10^{6})}\\ x=157m

For part (b)

No the proton would collide with air molecule

7 0
3 years ago
Other questions:
  • Express the number in scientific notation: 4/100
    14·1 answer
  • A maglev train can “float” because magnets in the bottom of the train and on the guideway...
    13·1 answer
  • HELP ASAP
    15·1 answer
  • A transmission system at a radio station uses a/an _______ to convert a direct current into a high frequency alternating current
    5·2 answers
  • A railroad car of mass 3.45 ✕ 104 kg moving at 2.60 m/s collides and couples with two coupled railroad cars, each of the same ma
    8·1 answer
  • Action - reaction forces are created at the ________ time and act upon __________ objects
    13·1 answer
  • Gravity will have a greater effect on an object with
    6·2 answers
  • Solve the proportion for p 30/24=p/8
    6·1 answer
  • A rope is vibrating in such a manner that three equal-length segments are found to be vibrating up and down with 321 complete cy
    9·1 answer
  • An object is traveling 15 m/s East and accelerates at a rate of 2.5 m/s. How long was in motion?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!