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
daser333 [38]
3 years ago
7

A ball is dropped from the ceiling and free falls to the floor. Which one of the

Physics
1 answer:
Alex73 [517]3 years ago
5 0

Answer:

A

Explanation:

Gravity

You might be interested in
What is the maximum number of unpaired d electrons that an atom or ion can possess?
Sonbull [250]

Answer:

5

Explanation:

The d subshell has 5 orbitals, each capable of holding a maximum of two electrons. Hund's rule tells us that every orbital in a sub-level must first be singly occupied by electrons before any orbital is doubly occupied. Therefore five electrons will fill the five orbitals within the d subshell.

3 0
3 years ago
Near the top of the Citigroup Center building in New York City, there is an object with mass of 4.00 ✕ 105 kg on springs that ha
jasenka [17]

Explanation:

It is given that,

Mass of an object, m=4\times 10^5\ kg

(a) Time period of oscillation, T = 2.4 s

The formula for the time period of spring is given by :

T=2\pi \sqrt{\dfrac{m}{k}}

Where

k is the force constant

k=\dfrac{4\pi ^2 m}{T^2}

k=\dfrac{4\pi ^2 \times 4\times 10^5}{(2.4)^2}

k=2.74\times 10^6\ N/m

(b) Displacement in the spring, x = 2.2 m

Energy stored in the spring is given by :

U=\dfrac{1}{2}kx^2

U=\dfrac{1}{2}\times 2.74\times 10^6\ N/m\times (2.2\ m)^2

U=6.63\times 10^6\ J

Hence, this is the required solution.

7 0
3 years ago
Travel north to south how would polaris be situated?
valentina_108 [34]

Answer:

idi

Explanation:

3 0
3 years ago
A spherical balloon is inflating with helium at a rate of 72 ft2/min . How fast is the​ balloon's radius increasing at the insta
Yanka [14]

The volume of the balloon is given by:

V = 4πr³/3

V = volume, r = radius

Differentiate both sides with respect to time t:

dV/dt = 4πr²(dr/dt)

Isolate dr/dt:

dr/dt = (dV/dt)/(4πr²)

Given values:

dV/dt = 72ft³/min

r = 3ft

Plug in and solve for dr/dt:

dr/dt = 72/(4π(3)²)

dr/dt = 0.64ft/min

The radius is increasing at a rate of 0.64ft/min

The surface area of the balloon is given by:

A = 4πr²

A = surface area, r = radius

Differentiate both sides with respect to time t:

dA/dt = 8πr(dr/dt)

Given values:

r = 3ft

dr/dt = 0.64ft/min

Plug in and solve for dA/dt:

dA/dt = 8π(3)(0.64)

dA/dt = 48.25ft²/min

The surface area is changing at a rate of 48.25ft²/min

7 0
3 years ago
The gas in a balloon has T=280K and V=0.0279m^3. If the temperature increases to 320K at constant pressure, what is the new volu
photoshop1234 [79]

Answer:

\boxed{ V_{2}= 0.03189 m^3}

Explanation:

According to Charles Law

=> \frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}

Where V_{1} = 0.0279 m³, T_{1} = 280 K and T_{2} = 320 K

=> \frac{0.0279}{280} = \frac{V_{2}}{320}

=> V_{2} = 0.03189 m³

7 0
3 years ago
Other questions:
  • A wheel rotates with a constant angular acceleration of 3.45 rad/s^2. Assume the angular speed of the wheel is 1.85 rad/s at ti
    13·1 answer
  • Why is disagreement among scientists important to the progress of science? Facing disagreement forces scientists to prove their
    6·2 answers
  • An 68 kg man on ice skates is pushing his 34 kg son, also on skates, with a force of 115 N. Together, they move across the ice s
    5·1 answer
  • A heavier car is always safer in a crash than a lighter car.
    6·1 answer
  • What is the length of AR?​
    8·1 answer
  • I have a question to whoever can tell me (10 points)
    8·1 answer
  • What is the only component of scalar quantities?
    10·1 answer
  • An airplane leaves New York to fly to Boston it travels 1000 KM in two hours what is the average speed of the airplane
    13·1 answer
  • A football game starts with a kickoff. If the ball is kicked with a velocity of 72 m/s 35 o to
    10·1 answer
  • What is common between transverse waves and longitudinal waves?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!