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
Rudiy27
3 years ago
9

A certain elevator cab has a total run of 198 m and a maximum speed is 317 m/min, and it accelerates from rest and then back to

rest at 1.11 m/s2. (a) How far does the cab move while accelerating to full speed from rest? (b) How long does it take to make the nonstop 198 m run, starting and ending at rest?
Physics
1 answer:
tester [92]3 years ago
7 0

Answer:

Explanation:

Given

Total run=198 m

maximum speed=317 m/min=5.28 m/s

acceleration=1.11 m/s^2

(a)Distance traveled while  accelerating

v^2-u^2=2as

(5.28)^2-0=2\times 1.11\times s

s=12.57 m

time taken

v=u+at

5.28=0+1.11\times t

t=4.75 s

(b)Time taken to cover 198 m

if car takes 12.57 m & 4.75 s to reach max speed so it also takes 12.57 m and 4.75 s to stop from max speed

Distance traveled with max speed=198-25.14=172.86 m

time taken=\frac{172.86}{5.28}=32.73 s

total time=4.75+32.73+4.75=42.25 s

You might be interested in
A 200.0 g block rests on a frictionless, horizontal surface. It is pressed against a horizontal spring with spring constant 4500
kenny6666 [7]

Answer:

 6 m/s

Explanation:

Given that :

mass of the block   m =  200.0 g  = 200 × 10⁻³ kg

the horizontal spring constant   k  =  4500.0 N/m

position of the block (distance x) = 4.00 cm  = 0.04 m

To determine the speed the block will be traveling when it leaves the spring; we applying the  work done on the spring as it is stretched (or compressed) with the kinetic energy.

i.e \frac{1}{2} kx^2  = \frac{1}{2} mv^2

kx^2 = mv^2

4500* 0.04^2 = 200*10^{-3} *v^2

7.2 =200*10^{-3}*v^{2}

v^{2}   =\frac{7.2}{200*10^{-3}}

v   =\sqrt{\frac{7.2}{200*10^{-3}}}

v = 6 m/s

Hence,the speed the block will be traveling when it leaves the spring is  6 m/s

5 0
4 years ago
What is the difference between gravimetric and volumetric analysis?
Masteriza [31]
<span>Once the presence of certain substances in a sample is known, the study of their absolute or relative abundance can help in determining specific properties. Gravimetric analysis yields more accurate data about the composition of a sample than volumetric analysis but also takes more time to perform in the laboratory.</span>
8 0
3 years ago
The cutoff frequency for a certain element is 1.22 x 10^15 Hz. What is its work function in eV?
Dovator [93]

The work function in eV for the given cutoff frequency is  5.05 eV.

<h3>What is cutoff frequency?</h3>

The work function is related to the frequency as

Wo = h x fo

where, fo = cutoff frequency and h is the Planck's constant

Given is the cutoff frequency for a certain element is 1.22 x 10¹⁵ Hz

Wo = 6.626 x 10⁻³⁴ x  1.22 x 10¹⁵ Hz / 1.6 x 10⁻¹⁹

Wo = 5.05 eV

Thus, the work function is  5.05 eV

Learn more about cutoff frequency.

brainly.com/question/14378802

#SPJ1

4 0
2 years ago
Which of the following statements about the discharging of a capacitor through a lightbulb are correct?
Sophie [7]

Answer:

a) Electrons in the wires flow away from the negative plate, toward the positive plate, reducing the charge on the plates.

Explanation:

a) true. The electrons leave the plate and stop by the bulb where the energy dissipates

b) False the electric field in the entire metal cable is the same because it is an equipotential surface

c) False electrons cannot jump from the metal plate

d) False the load does not create a marginal field

3 0
3 years ago
Read 2 more answers
Brainliest!
USPshnik [31]

Answer:

C) 40,000 Joules

Explanation:

½(1000)10² - 10000 = 40000

3 0
3 years ago
Other questions:
  • An object moves from the position +16m to the position +43m in 12s. What us the total displacement
    5·1 answer
  • If you want to stop the current flow through Device 3 in the circuit shown above, which one of the following single switches sho
    14·2 answers
  • The table below shows the average distances of Venus and Earth from the sun. -Name of Planet -Distance from the sun (in AU) Venu
    6·2 answers
  • Identify the independent and dependent variables.
    10·1 answer
  • The wavelength of some violet light is 420.0 nm. what is the frequency of this violet light?
    10·2 answers
  • 200 mL of an ideal gas is placed in a piston and is held at a pressure of 500 torr. If the temperature is held constant and the
    15·1 answer
  • When a pendulum swings if not continuously pushed it will stop eventually because some of its energy is changef into what energy
    11·2 answers
  • The chemical symbol for the element calcium is Ca. What would be the symbol representing calcium atoms that have lost two electr
    5·2 answers
  • What can increase genitic diversity?
    8·1 answer
  • Concept Development
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!