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
Svetradugi [14.3K]
2 years ago
15

Janet jumps off a high diving platform with a horizontal velocity of 2.8 meters per second in lands in the_________.

Physics
1 answer:
Inessa05 [86]2 years ago
6 0

Answer:

Janet jumps off a high diving platform with a horizontal velocity of 2.89 m per s and lands in the water 1.5 s later. How high is the platform?

Platform is 11.025 meters high .

Explanation:

we have Vx = 2.89 m/s

time taken = 1.5 seconds

height of the platform = ?

so,

As Janet is jumping from a high diving platform from a certain unknown height their must be involvement of gravity in action.

we can use,

h = Vi*t+(1/2)*g*t^2

where ,

h = height

Vi = initial horizontal velocity that will be zero

t = time in seconds

g = gravity due to acceleration

now put the values

h = 0+(1/2)*(9.8)*(1.5)^2

h = 11.025-m

You might be interested in
A recipe for a casserole calls for 1 cup of milk. If a chef currently has 0.5 gallons of milk, how many casseroles can the chef
Yakvenalex [24]

Answer:

<em>The chef can make 8 casseroles</em>

Explanation:

<u>Units Conversion</u>

We need to recall 1 gallon = 16 US cups.

A casserole needs 1 cup of milk, and the chef has 0.5 gallons of milk. Those 0.5 gallons are equivalent to 0.5*16 = 8 cups, thus the chef can make 8 casseroles.

4 0
3 years ago
A ray of light is moving from a material having a high indexof refraction into a material with a lower index of refraction.
luda_lava [24]

(a) Away from the normal

We can find the direction of bending of the ray of light by using Snell's equation:

n_1 sin \theta_1 = n_2 sin \theta_2

where we have:

n1, n2: index of refraction of the first and second medium

\theta_1, \theta_2; angle that the incident and the refracted ray form with the normal to the surface

Here, the light ray moves from a material with high index of refraction to a material with lower index, so we have

n_1 > n_2

Re-arranging Snell's law we find

sin \theta_2 = \frac{n_1}{n_2} sin \theta_1

since we have

\frac{n_1}{n_2}>1

this implies

sin \theta_2 > sin \theta_1\\\theta_2 > \theta_1

so the ray of light bends away from the normal.

(b) The wavelength is greater in the second material (the one with lower index of refraction)

The wavelength of the light in a medium is given by

\lambda=\frac{\lambda_0}{n}

where

\lambda_0 is the wavelength of the light in a vacuum

n is the refractive index

The equation can be rewritten as

\lambda_0 = \lambda_1 n_1 = \lambda_2 n_2

and again it can be rewritten as

\lambda_2 = \frac{n_1}{n_2} \lambda_1

where

\lambda_1 = 600 nm\\\frac{n_1}{n_2}>1

Therefore, we have that the wavelength in the second medium (the one with lower index of refraction) is longer than the wavelength in the first medium.

(c) The frequency remains the same

Wavelength and speed of a light ray depend on the medium in which the wave is travelling through, however the frequency does not depend on that, so it remains the same in the two mediums.

8 0
2 years ago
A particle is acted upon by a net force F=F0e-kx, where F0 and k are constants. If the particle has velocity equal to zero at x=
yuradex [85]

Answer:

F₀ /k .

Explanation:

Force is variable

F=F₀ e^{-kx}

kinetic energy = work done by force

= ∫ F dx

= ∫F₀ e^{-kx} dx

= F₀ e^{-kx} / -k

E =  F₀ e^{-kx} / -k

=  -F₀ /(k e^{kx} )

For maximum E , e^{kx} should be minimum ,

e^{kx} is minimum for x = 0

maximum value of E = F₀ /k .

5 0
3 years ago
A 5 kg mass is moving at 3 ms-1. Calculate its kinetic energy.
cupoosta [38]

Answer:

1/2 MV squared

1/2*5*3 squared

=22.5

8 0
2 years ago
Which option is an example of a physical property?
solong [7]

The correct answer would be A. boiling point. And the reason to that is because pH, toxicity, and rusting ability are all examples of chemical properties.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Apply the concept of density to explain why oil floats on water.
    5·1 answer
  • On the 1-to-10-billion scale, about how far is it to the nearest stars besides the sun? on the 1-to-10-billion scale, about how
    7·1 answer
  • A 10kg sphere hits a stationary 8kg sphere. After the collision the 8kg sphere moves off in the positive direction at 4m/s. If t
    5·1 answer
  • A sinusoidal electromagnetic wave is propagating in a vacuum in the +z-direction.
    6·1 answer
  • Which of the following is an example of Newton's Third Law?* O A stack of pennies will not move unless you flick them over. O Fa
    13·1 answer
  • Guys pa help...Sana po yong totoo...wag napo sumagot Kung do nman alam​
    15·1 answer
  • What quantity does a Percent measure?
    7·2 answers
  • What does a search engine do?
    9·2 answers
  • What do you mean by kinetic energy and potential energy ?
    10·1 answer
  • Which type of electromagnetic wave allows you to control your television witha remote control?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!