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
o-na [289]
2 years ago
14

HELP PLEASE USE KINEMATIC EQUATIONS!!!

Physics
1 answer:
DaniilM [7]2 years ago
4 0

Answer:

ans is 16.66sec time is taken by runner

You might be interested in
5. A simple bridge of 36.5 m length has two concrete supports, one on each end. A car drives across the bridge and stops 10.2 m
Minchanka [31]

Answer:

X = 2.882×10⁵ N,

Y =  1.43×10⁴ N

Explanation:

From the diagram attached,

Let the reaction from the two support be X and Y.

According to the condition of equilibrium

Sum of upward force = sum of downward force.

X+Y = 5.25×10⁴+2.5×10⁵

X+Y = 3.025×10⁵.............................. Equation 1

Also,

Sum of clockwise moment = sum of anticlockwise moment.

Take the moment about support A

(10.2×5.25×10⁴)+(18.25×2.56×10⁵) = 36.5×Y

52.075×10⁴ = 36.5Y

Y =52.075×10⁴/36.5

Y = 1.43×10⁴ N.

Substituting the value of Y into equation 1

X+ 1.43×10⁴ = 3.025×10⁵

X = 3.025×10⁵-1.43×10⁴

X = 2.882×10⁵ N.

Hence the force provided by each supports are

X = 2.882×10⁵ N, and Y =  1.43×10⁴ N

3 0
4 years ago
A diffraction grating is illuminated with yellow light. The diffraction pattern seen on a viewing screen consists of three yello
horsena [70]

Answer:

(d) an orange fringe at 0°, yellow fringes at ±50°, and red fringes farther out

Explanation:

The available multiple choice to the question is:

(a) only red fringes at 0° and ±50°

(b) only yellow fringes at 0°and ±50°

(c) only orange fringes at 0∘ and ±50°

(d) an orange fringe at 0°, yellow fringes at ±50° , and red fringes farther out,

(e) an orange fringe at 0°, yellow fringes at ±50°, and red fringes closer in.

Further Explanation:

In diffraction there is a spot at 0° for all wavelengths, so the red fringe and yellow fringe will combine there to make orange fringe. However, the angle of diffraction increase with an increase in wavelength. The red fringer has a longer wavelength than the yellow fringe, so the yellow fringe will be at ±50°, and the red fringe farthers out.

3 0
3 years ago
___________ is a force that opposes motion between two surfaces that are in contact
kobusy [5.1K]

Answer:

Friction

Explanation:

Friction can be simply defined as the force that creates resistance to any motion of a particular object that moves relative to another object. It occurs because of the electromagnetic force of attraction that is generated by the charged particles located between the two distinct contacting surfaces. It is a non-fundamental force.

This type of force is mainly responsible for the resisting of sliding and/or rolling of an object over the other one.

5 0
3 years ago
Read 2 more answers
Suppose you take a 50gram ice cube from the freezer at an initial temperature of -20°C. How much energy would it take to complet
notsponge [240]

Answer:

The amount of energy required is 152.68\times 10^{3}Joules

Explanation:

The energy required to convert the ice to steam is the sum of:

1) Energy required to raise the temperature of the ice from -20 to 0 degree Celsius.

2) Latent heat required to convert the ice into water.

3) Energy required to raise the temperature of water from 0 degrees to 100 degrees

4) Latent heat required to convert the water at 100 degrees to steam.

The amount of energy required in each process is as under

1) Q_1=mass\times S.heat_{ice}\times \Delta T\\\\Q_1=50\times 2.05\times 20=2050Joules

where

'S.heat_{ice}' is specific heat of ice =2.05J/^{o}C\cdot gm

2) Amount of heat required in phase 2 equals

Q_2=L.heat\times mass\\\\\therefore Q_{2}=334\times 50=16700Joules

3) The amount of heat required to raise the temperature of water from 0 to 100 degrees centigrade equals

Q_3=mass\times S.heat\times \Delta T\\\\Q_1=50\times 4.186\times 100=20930Joules

where

'S.heat_{water}' is specific heat of water=4.186J/^{o}C\cdot gm

4) Amount of heat required in phase 4 equals

Q_4=L.heat\times mass\\\\\therefore Q_{4}=2260\times 50=113000Joules\\\\\\\\\\\\Thus the total heat required equals Q=Q_{1}+Q_{2}+Q_{3}+Q_{4}\\\\Q=152.68\times 10^{3}Joules

5 0
3 years ago
How long will bus take to travel 150 km at an average speed of 40km/hr
romanna [79]

Answer:

3.75 hours

Explanation:

By v = \frac{d}{t}

where v is the velocity (or speed in this case)

d is the distance travelled

t is the time taken

t = \frac{150}{40}=3.75
Therefore it takes 3.75 hours for the bus to travel 150 km and 40 km/hr.

7 0
3 years ago
Other questions:
  • a bus is moving with a constant velocity 10m/s along horizontal rode. a man standing inside bus throws ball virtically upward wi
    14·1 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
  • Why is it important to consider experimental error in all the empirical results presented?
    7·2 answers
  • What is the smallest particle representing hydrogen peroxide?
    6·1 answer
  • An object in circular motion has velocity that is constantly changing. The direction of the acceleration is
    15·1 answer
  • Select the statement that correctly describes how light travels. (1 point) Light travels at different speeds when the light sour
    6·1 answer
  • Mrs. Smith walks from her house 11.2 m to the grocer. Then she walks from the grocer 5.7 m to the pet store. Then she walks 32.7
    14·1 answer
  • Explain Why must a cooling system do work to transfer thermal energy?
    12·1 answer
  • Infrared and ultraviolet waves have different frequencies.
    8·1 answer
  • A 15 kg object and a 18 kg object are connected by a massless compressed spring and
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!