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
Dafna11 [192]
3 years ago
8

a bicycle uniformly from rest at time t the velocity of the bicycle is v at what time will the bicycle have a velocity of 4v​

Physics
1 answer:
sesenic [268]3 years ago
7 0

Here

  • Acceleration and initial velocities are constant.

According to first equation of kinematics.

\\ \sf\longmapsto v=u+at

\\ \sf\longmapsto v=0+at

\\ \sf\longmapsto v=at

\\ \sf\longmapsto v\propto t

  • Time was t at velocity v
  • Time will be 4t at velocity 4v
You might be interested in
A block of aluminum with a volume of 10 cm3 is placed in a beaker of water filled to the brim. Water overflows. The same is done
mihalych1998 [28]

Answer:

a) Both blocks displace the same amount of water.

Explanation:

Specific gravity (S.G.) is a quantity that tells how much and object is submerged on water and is given by:

S.G=\frac{\rho_{block}}{\rho_{fluid}}

with ρ the densities

Density of water is 997 \frac{kg}{m^{3}} and density of aluminum is 2712 \frac{kg}{m^{3}}

So:

S.G=\frac{2712}{997}=2.72

A S.G. value bigger than one means the object is totally submerged so the water displaced is equal to the volume of the cube.

For the lead (density = 11340\frac{kg}{m^{3}}) block we're going to calculate specific gravity in this case:

S.G=\frac{11340}{997}=11.37

Again S.G gravity is bigger than 1, so the lead block is totally submerged too, that implies the volume of water displaced is the volume of the block, that is the same volume as the aluminum block, so a is the correct one.

7 0
3 years ago
These steps are followed when using the half-life of carbon-14 to determine
aniked [119]

Answer:

C. B, A,C

Explanation:

8 0
3 years ago
Read 2 more answers
How are the functions of the cytoskeleton and the cell wall similar
dmitriy555 [2]
The functions of the cytoskeleton and the cell wall are similar because they both act like a barrier for the cell.
4 0
3 years ago
Using a refracting telescope, you observe the planet Mars when it is 2.11 × 10 11 m 2.11×1011 m from Earth. The diameter of the
Norma-Jean [14]

Answer:

y = 150 Km

Explanation:

given,                                                      

Distance of the planet Mars from earth D = 2.11 × 10¹¹ m          

The diameter of the telescope's objective lens d = 0.949 m      

The wavelength of light λ = 553 nm            

                                        = 553 x 10⁻⁹ m            

resolution of the telescope = ?                          

     y = \dfrac{1.22\lambda\ D}{d}          

     y = \dfrac{1.22\times 553\times 10^{-9}\times 2.11 \times 10^{11}}{0.949}                                          

           y = 150003 m                          

          y = 150 Km                          

the minimum feature size is equal to y = 150 Km

8 0
3 years ago
Point PP is a distance d1d1 = 4.0 mm above a large sheet of metal that carries a current of 35 AA in the positive xx direction a
zhenek [66]

Answer:

The width of the sheet is   w =0.8046m

Explanation:

  From the question we are told that

             The distance of point P above a  large sheet of metal is D = 4.0mm =\frac{4}{1000}  = 0.004m

             The current on the large metal sheet  is  I =34A

              The  distance of the the point P below a long wire d = 3.0mm = \frac{3}{1000} = 0.003m

               The current on the long wire is  I_w = 0.41A

                The magnetic field at  P is  B = 0T

Generally magnetic field  of P long wire is mathematically represented as

                B_w = \frac{\mu_o I_w}{2\pi r}

Generally magnetic field  of P large sheet of meta is mathematically represented as

              B_m = \frac{\mu_o K}{2}

Where K is the current per unit width

 The total magnetic field at P is

                  \frac{\mu_o I_w}{2 \pi r}  = \frac{\mu_o K}{2}

Making K the subject of formula

                 K = \frac{2 I_w }{2 \pi r }

 Substituting values

                   K = \frac{2 *  0.41 }{2 * 3.142 * (0.0030) }

                        K = 43.4967 A/m

Generally K is mathematically represented as

                K = \frac{I}{w}

Where w is the width of the large sheet

Therefore the width  of the metal sheet   w = \frac{I}{K}

                                                                         = \frac{35}{43.4967}

                                                                         w =0.8046m

             

                                                               

                                                                 

                   

7 0
3 years ago
Other questions:
  • The wavelength of a wave on a string is 1.2 meters. If the speed of the wave is 60 meters/second, what is its frequency? A. 0.20
    15·1 answer
  • What's the time it takes a car to attain the speed of 30 m/s when accelerating from rest at 2 m/s (squared)
    13·1 answer
  • What is the main purpose of trying to quickly cool heated food?
    6·2 answers
  • An object falling under the influence of gravity and no other force is said to be
    13·1 answer
  • A block of weight mg sits on an inclined plane as shown in (Figure 1) . A force of magnitude F1 is applied to pull the block up
    13·1 answer
  • HELP Giving all the points I can. Physics virtual lab report: circuit design<br><br> Please help me.
    15·2 answers
  • W imieniu państwa napisz zaproszenie dla rodzeństwa na uroczystą kolacje
    14·1 answer
  • What is an example of situational irony in the excerpt?​
    10·2 answers
  • Steel beams are used for load bearing supports in a building. Each beam is 4.0 m long with a cross-sectional area of 7.5 10-3 m2
    10·1 answer
  • A spinning turbine at an electrical plant produces energy that flows through wires to your house. The energy in the wires can be
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!