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
Sladkaya [172]
3 years ago
15

Water is falling from height of 84 m. If half of the energy of water is converted into heat, the increase in the temperature of

the water at the bottom is:
​
Physics
2 answers:
nydimaria [60]3 years ago
5 0

Answer:

so its 0.098*C

Explanation:

Let m gram be the mass of water.

Then potential energy of water is:

P.E.=mgh

=m×980×8400

Since potential energy is converted to kinetic energy

P.E.=K.E.

K.E.=m×980×8400

Half of kinetic energy is converted into heat.

Then  heat energy:

Heat energy=

2

1

​

×m×980×8400

Convert joule into calories

heat=

4.2×10

7

m×980×4200

​

=m×0.098

But heat is:

Heat=msΔT

∴msΔT=m×0.098

m×1×ΔT=m×0.098

ΔT=0.098C

Rise in temperature of water is =0.098

∘

C .

saul85 [17]3 years ago
4 0

Answer:

what are the options??? to choose the answer from?

Explanation:

You might be interested in
A 60 year old person has a threshold of hearing of 95.0 dB for a sound with frequency f=10,000 Hz. By what factor must the inten
Nadusha1986 [10]

Answer:

The intensity increased by a factor of 158489

Explanation:

Given that,

Sound level = 95.0 dB

Sound level = 43.0 dB

Frequency = 10000 Hz

We need to calculate the ratio of sound intensity

Using formula of sound level

sound\ level =10 log\dfrac{I}{I_{0}}

Put the value into the formula

95.0=10\ log\dfrac{I_{1}}{I_{0}}...(I)

43.0=10\ log\dfrac{I_{2}}{I_{0}}.....(II)

Subtracting these equations

52.0=10\ log\dfrac{I_{1}}{I_{2}}

\log\dfrac{I_{1}}{I_{2}}=5.2

Taking inverse log

\dfrac{I_{1}}{I_{2}}=10^{5.2}

\dfrac{I_{1}}{I_{2}}=158489

Hence, The intensity increased by a factor of 158489

4 0
2 years ago
15 POINTS! What is the function of the nervous system? What is the basic unit of the nervous system?
vlada-n [284]

The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body.

The somatic system consists of nerves that connect the brain and spinal cord with muscles and sensory receptors in the skin.

The basic unit of the nervous system is the "nerve cell," called "neuron

4 0
3 years ago
Read 2 more answers
What is the answer?
Andrews [41]

Answer:

6.26 m/s

Explanation:

Pretty slow.... the PE (Potential Energy) at 2m will be converted to KE (Kinetic Energy) at the bottom of the track (neglecting friction)

PE    =   KE

mgh = 1/2 mv^2     divide both sides of the equation by 'm'

gh    = 1/2 v^2             multiply both sides by 2

2 gh = v^2               take sqrt of both sides

v = sqrt ( 2gh) = sqrt ( 2*9.81*2) = 6.26 m/s

3 0
2 years ago
As a new electrical technician, you are designing a large solenoid to produce a uniform 0.170 T magnetic field near the center o
MrRa [10]

Answer:

18.6012339739 A

Explanation:

\mu_0 = Vacuum permeability = 4\pi \times 10^{-7}\ H/m

L = Length of wire = 55 cm

N = Number of turns = 4000

I = Current

Magnetic field is given by

B=\dfrac{\mu_0NI}{L}\\\Rightarrow I=\dfrac{BL}{\mu_0N}\\\Rightarrow I=\dfrac{0.17\times 0.55}{4\pi \times 10^{-7}\times 4000}\\\Rightarrow I=18.6012339739\ A

The current necessary to produce this field is 18.6012339739 A

7 0
3 years ago
10) If the mass 2m, the left mass
Romashka-Z-Leto [24]

Answer:

F = \frac{-Gm_{1}m_{2} }{r^{2} }.

Explanation:

Gravitational force between two objects of masses m_{1},  m_{2} kept at a distance r is given by the formula

F = \frac{-Gm_{1}m_{2} }{r^{2} }

Here ,m_{1} = 2m

         m_{2} = \frac{m}{2}

         

Thus , F = \frac{-G.2m.\frac{m}{2} }{r^{2} }

          F = \frac{-Gm_{1}m_{2} }{r^{2} }.

7 0
3 years ago
Other questions:
  • If the speed of light in a vaccum is c, the speed of light in a medium like glass with an index of refraction of 1.5 is : (a) 3c
    14·1 answer
  • Atoms in a molecule are held together through shared
    5·1 answer
  • If the density of a diamond is 3.5 g/cm", what would be the mass of a diamond whose
    11·1 answer
  • I NEED HELP, PLEASE.
    6·1 answer
  • 3. Two Metra trains approach each other on separate but parallel tracks. Train A has a speed of 90 km/ hr, train B has a speed o
    10·1 answer
  • Which equation is used to calculate the magnetic force on a charge moving in a magnetic field? F = |q|vBcos F = |q|vBsin F = |q|
    15·2 answers
  • A block of unknown mass is attached to a spring of spring constant 7.3 N/m and undergoes simple harmonic motion with an amplitud
    8·1 answer
  • A ringing bell sends sound waves in all<br> directions<br> places<br> sides
    5·1 answer
  • Please help help help mee
    14·1 answer
  • A speedboat with a mass of 531 kg (including the driver) is tethered to a fixed buoy by a strong 30.3 m cable. The boat's owner
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!