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
iren [92.7K]
3 years ago
11

Use the following information to answer questions 4 and 5:

Physics
1 answer:
Bess [88]3 years ago
8 0

Question 4

B. Toby is correct because the rock is experiencing a negative acceleration, causing its positive velocity to decrease until the rock reaches a velocity of O m/s before becoming negative.

Question 5

At the maximum height, velocity is 0, so:

v = v₀ - gt

0 = 14.75 - 9.8t

t = 14.75/9.8

t = 1.5 s    (OPTION A)

You might be interested in
If a wave has a frequency of 50 Hz and a wavelength of 2 meters.<br> Find its speed.
natka813 [3]

Answer:

100 m/s

Explanation:

here we use the wave equation which states that the velocity is equal to the product of the frequency and the wavelength.

so v = 50 × 2

v = 100 m/s

6 0
3 years ago
The old-fashioned record player had two speeds: one for long-playing albums (LP) and one for singles. The turntable speed for LP
eimsori [14]

Answer:

\alpha = 0.305 rad/s^2

Explanation:

initial frequency of revolution is given as

f_1 = 100/3 rpm

now initial angular speed is

\omega_i = 2\pi f

\omega_i = 2\pi(\frac{100}{3\times 60})

\omega_i = 3.49 rad/s

Similarly final angular speed is given as

\omega_f = 2\pi f_2

\omega_f = 2\pi(\frac{45}{60})

\omega_f = 4.71 rad/s

Now angular acceleration is given as

\alpha = \frac{\omega_f - \omega_i}{\Delta t}

\alpha = \frac{4.71 - 3.49}{4}

\alpha = 0.305 rad/s^2

3 0
3 years ago
As the speed of a fluid increases, ____.
Fofino [41]
The correct answer for the question that is being presented above is this one: "a. the pressure decreases." As the speed of a fluid increases, the pressure decreases." The relationship of the speed and the pressure is inversely proportional. As the pressure increases, the speed decreases.
3 0
4 years ago
Read 2 more answers
You are working on a proof. You know that A and B are on the perpendicular bisector of CD. What can you conclude?
Hoochie [10]
A point on the perpendicular bisector of a  line segment
is equidistant from the ends of the segment.

So
           AC = AD
and
           BC = BD .

This can sometimes be very useful.
3 0
4 years ago
Read 2 more answers
Fiber optics are an important part of our modern internet. In these fibers, two different glasses are used to confine the light
motikmotik

Answer:

n_cladding = 1.4764

Explanation:

We are told that θ_max = 5 °

Thus;

θ_max + θ_c = 90°

θ_c = 90° - θ_max

θ_c = 90° - 5°

θ_c = 85°

Now, critical angle is given by;

θ_c = sin^(-1) (n_cladding/n_core)

sin θ_c = (n_cladding/n_core)

n_cladding = (n_core) × sin θ_c

Plugging in the relevant values, we have;

n_cladding = 1.482 × sin 85

n_cladding = 1.4764

7 0
3 years ago
Other questions:
  • An unmanned spacecraft leaves for Venus. Which statements about the spacecrafts journey are true?
    9·2 answers
  • A constant force N acts on an object as it moves along a straight-line path. If the object’s displacement is m, what is the work
    8·1 answer
  • What happens to the mass of a metal ball if its heated?
    12·2 answers
  • Ground reaction force acting on carter
    12·1 answer
  • What is the Meaning of<br>Electromagnetism?​
    12·1 answer
  • Consider two circular metal wire loops each carrying the same current I as shown below. In what region(s) could the net magnetic
    10·1 answer
  • 1 point
    15·1 answer
  • The electromagnetic wave that CT scans are based on is called a
    13·2 answers
  • How to find acceleration?
    10·1 answer
  • A ball of mass 2kg falls from a height of 200m. Calculate it's kinetic energy after falling a distance of 50m . (g=10m/s²) . Neg
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!