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
ELEN [110]
2 years ago
11

An electric immersion heater is put at the bottom of a large tank of water. The water next to the heater becomes warm

Physics
1 answer:
djyliett [7]2 years ago
4 0

Answer:

when the water is heated with immersion heater, the water becomes less dense due to which the warm water rises up and the cooler water fills it's space.

You might be interested in
A 52 kg and a 95 kg skydiver jump from an airplane at an altitude of 4750 m, both falling in the pike position. Assume all value
Scilla [17]

Answer: 52 kg skydiver: 9.09 m/s and 522.55 s

              95 kg skydiver: 12.3 m/s and 386.2 s

Explanation: <u>Drag</u> <u>Force</u> is an opposite force when an object is moving in a fluid.

For skydivers, when falling through the air, the forces acting on it are gravitational and drag forces. At a certain point, drag force equals gravitational force, which is constant on any part of the planet, producing a net force that is zero. Since there is no net force, there is no acceleration and, consequently, velocity is constant. When that happens, the person reached the <u>Terminal</u> <u>Velocity</u>.

Drag Force and Velocity are proportional to the squared speed. So, terminal velocity is given by:

F_{G}=F_{D}

mg=\frac{1}{2}C \rho Av_{T}^{2}

v_{T}=\sqrt{\frac{2mg}{\rho CA} }

where

m is mass in kg

g is acceleration due to gravitational force in m/s²

ρ is density of the fluid in kg/m³

C is drag coefficient

A is area of the object in the fluid in m²

Calculating:

The 52kg skydiver has terminal velocity of:

v_{T}=\sqrt{\frac{2(52)(9.8)}{(1.21)(0.7)(0.14)} }

v_{T}= 9.09

The 95kg skydiver's terminal velocity is

v_{T}=\sqrt{\frac{2(95)(9.8)}{(1.21)(0.7)(0.14)} }

v_{T}= 12.3

The 52 kg and 95kg skydivers' terminal velocity are 9.09m/s and 12.3m/s, respectively.

The time each one will reach the floor will be:

52 kg at 9.09 m/s:

t=\frac{4750}{9.09}

t = 522.5

95 kg at 12.3 m/s:

t=\frac{4750}{12.3}

t = 386.2

The 52 kg and 95kg skydivers' time to reach the floor are 522.5 s and 386.2 s, respectively.

3 0
2 years ago
An electric motor rotating a workshop grinding wheel at a rate of 151 rev/min is switched off. Assume constant angular decelerat
tamaranim1 [39]

Answer:

Explanation:

Initial angular velocity ω₀ = 151 x 2π / 60

= 15.8  rad /s

final velocity = 0

Angular deceleration α = 2.23 rad / s

ω² = ω₀² -  2 α θ

0 = 15.8² - 2 x 2.23 θ

= 55.99  rad

one revolution = 2π radian

55.99 radian = 55.99  / 2 π no of terns

= 9 approx .

8 0
3 years ago
Why was Dalton's atomic theory difficult for other scientists to accept? please help?!!!!!
Debora [2.8K]
It is cellmicktomic atoms
7 0
3 years ago
The scientist who suggested that energy can be created under certain conditions was
tester [92]
Einstein hope this helped
7 0
3 years ago
Read 2 more answers
An environmental scientist gives a demonstration on composting. Roger is in the audience. He wonders how composting discarded fo
Wittaler [7]

Answer:

A

Explanation:

I just did the test

4 0
3 years ago
Other questions:
  • How far does a roller coaster travel if it accelerates at 2.83 m/s2 from an initial
    5·1 answer
  • Materials that are magnetic have_________that are lined up in the same orientation?
    14·1 answer
  • Which one of the following terms is used to describe the bending of waves and subsequent spreading around obstacles or the edges
    8·1 answer
  • Which subatomic particle will you add or remove from an atom to create a new element?
    5·1 answer
  • 4.7 cm. The tube is sealed at one end and loaded with lead shot to give it a total mass of M = 130 g. The tube floats in water (
    5·1 answer
  • Three equal 1.60-μCμC point charges are placed at the corners of an equilateral triangle with sides 0.800 mm long. What is the p
    11·1 answer
  • 4. Which of the following is equivalent to 800 cm?
    8·1 answer
  • Someone please help​
    7·1 answer
  • A uniform metal bar of length 6m and mass 100kg rest with its upper end against a smooth vertical wall and with its lower end on
    13·1 answer
  • <img src="https://tex.z-dn.net/?f=%7B%5Chuge%5Cfcolorbox%7Bblue%7D%7Bblack%7D%7B%5Cpink%7B%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!