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4 years ago

13

A ball is at rest on the floor of a car moving at a constant velocity. What will happen to the ball if the car swerves suddenly

to the left?

1 answer:

Elanso [62]4 years ago

4 0

The ball will go suddenly to the right

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You drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially

3241004551 [841]

Answer: $T=12.69^{\circ}C$

Explanation:

Given

Mass of ice $m=60 gm$

mass of water $M=760 gm$

Initial Temperature of water $T_i=20^{\circ}C$

Let T be the Final Temperature of mixture

Latent heat of Fusion $L=334 J/gm$

heat required to melt ice completely is

$Q_1=60\times 334=20.04 kJ$

Heat released by water is taken by ice thus

$Mc_{water}(20-T)=mL+mc_{water}(T-0)$

$0.76\times 4.184\cdot (20-T)=20.04+0.06\times 4.184\cdot (T)$

$T=12.69^{\circ}C$

7 0

3 years ago

A horizontal force in used to pull a 5 kilogram cart at a constant speed of 5 meters per second across the floor as shown in the

ArbitrLikvidat [17]

B. because 5 times 10 is 50, and 50 divided by 5 is 10

3 0

3 years ago

A coil is made of 150 turns of copper wire wound on a cylindrical core. If the mean radius of the turns is 6.5 mm and the diamet

Nadusha1986 [10]

Answer:

0.84 Ω

Explanation:

r = mean radius of the turn = 6.5 mm

n = number of turns of copper wire = 150

Total length of wire containing all the turns is given as

L = 2πnr

L = 2 (3.14)(150) (6.5)

L = 6123 mm

L = 6.123 m

d = diameter of the wire = 0.4 mm = 0.4 x 10⁻³ m

Area of cross-section of the wire is given as

A = (0.25) πd²

A = (0.25) (3.14) (0.4 x 10⁻³)²

A = 1.256 x 10⁻⁷ m²

ρ = resistivity of copper = 1.72 x 10⁻⁸ Ω-m

Resistance of the coil is given as

$R = \frac{\rho L}{A}$

$R = \frac{(1.72\times 10^{-8}) (6.123))}{(1.256\times 10^{-7}))}$

R = 0.84 Ω

6 0

4 years ago

What came before the big bang? What was..there? If not matter?

Vlada [557]

“We have very good evidence that there<span> was a </span>Big Bang, so the universe as ... found that before<span> our universe </span>there<span> was nothing, nothing at all, </span>not<span> even time itself. ... behind the more familiar forms of </span>matter<span> and energy that fill the universe today. ... </span>If<span> we assume inflation is eternal into the past </span>

7 0

3 years ago

What social science, which deals with the behavior and thinking of organisms, differs from sociology primarily in that it focuse

Svetlanka [38]

Answer : The correct answer is- Psychology.

As per the American Psychological Association, psychology can be described as the scientific study of mind and behavior of a particular individual.

There are primarily four goals of psychology that are to describe, to explain, to predict, and to control the mental processes as well behavior of a person.

On the contrary, sociology focuses on behaviour of group of individuals. It is the study of structure, function as well as development of society.

Thus, psychology is the right answer to the question.

5 0

4 years ago

Read 2 more answers