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QveST [7]
3 years ago
9

A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the person's hand at

-5.0 m/sec, what was its velocity on impact?
Physics
1 answer:
GrogVix [38]3 years ago
5 0
The acceleration of gravity on Earth is 9.8 meters per second every second.  So
in 1.1 second of falling, an object gains (9.8 x 1.1) = 10.78 meters per second of
downward speed.

The balloon was already falling at 5 m/sec when the time began, and it gained
another 10.78 m/sec on the way.  So at the end of 1.1 second, its downward
speed was (5.0 + 10.78) = 15.78 m/sec.

Its velocity was 15.78 m/sec downward. 
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A weather balloon is partially inflated with helium gas to a volume of 2.0 m³. The pressure was measured at 101 kPa and the temp
Yanka [14]

Answer:

4.7 m³

Explanation:

We'll use the gas law P1 • V1 / T1 = P2 • V2 / T2

* Givens :

P1 = 101 kPa , V1 = 2 m³ , T1 = 300.15 K , P2 = 40 kPa , T2 = 283.15 K

( We must always convert the temperature unit to Kelvin "K")

* What we want to find :

V2 = ?

* Solution :

101 × 2 / 300.15 = 40 × V2 / 283.15

V2 × 40 / 283.15 ≈ 0.67

V2 = 0.67 × 283.15 / 40

V2 ≈ 4.7 m³

7 0
2 years ago
When a star collapses to form a black hole, its mass _____.
romanna [79]
When a star collapses to form a black hole, its mass increases, that is letter C. One example of this is the Big Bang Theory.  
<span>
It is by no doubt that our universe had had its own starting point but how it really started became a debate for the scientists over the past centuries. From theories such as Ekpyrotic theory, White Holes, Matrix theory, and Quantum theory, the Big Bang theory is the theory mostly accepted by scientists. According to the theory, the universe started as a singularity, that is, from a black hole under extreme gravitational pressure and expanded (instead of exploded) and cooled. Its cooling, according to the theory, is still happening now as of the moment.</span>
7 0
3 years ago
The picture below shows a person exploring an underwater cave in Florida.
lubasha [3.4K]
Underwater caves in Florida are primarily formed due to the abundance of limestone layers just situated below the ground, forming the "Floridan Aquifer." Layers of these limestones are believed to be thousands of meters thick. When rainwater is being seeped into the ground, it softens the calcite present in limestones due to its acidic nature until it is dissolved. This leads to the formation of cavities and tunnels which eventually becomes an interconnected network of passages over time. As water continues flowing through these passages, which builds up from the bottom of these cavernous empty spaces, underwater caves are then formed. Therefore, the first choice is the answer.
6 0
3 years ago
Suppose a 50 turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil origin
Ilia_Sergeevich [38]

Answer:

EMF = 108.3 Volts

Explanation:

As per Faraday's law of electromagnetic induction we know that rate of change in magnetic flux will induce EMF in closed loop

So it is given as

EMF = N\frac{d\phi}{dt}

EMF = N\frac{BA - 0}{\Delta t}

now we know that

N = 50 turns

B = 1.5 T

A = 0.325 m^2

\Delta t = 0.225 s

now we have

EMF = (50)(\frac{1.5\times 0.325}{0.225})

EMF = 108.3 Volts

7 0
4 years ago
In a thundercloud there may be an electric charge of 24 C near the top of the cloud and −24 C near the bottom of the cloud. If t
lidiya [134]

Answer:

Electric force, F=1.29\times 10^6\ N

Explanation:

Given that,

Charge 1, q_1=24\ C

Charge 2, q_2=-24\ C

Distance between charges, d = 2 km

The electric force is given by :

F=k\dfrac{q_1q_2}{d^2}

k is the electrostatic constant

F=8.98755\times 10^9\times \dfrac{(24)^2}{(2\times 10^3)^2}

F = 1294207.2 N

or

F=1.29\times 10^6\ N

Hence, this is the required solution.

5 0
4 years ago
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