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Rom4ik [11]
3 years ago
5

Bromine is a liquid at room temperature. The volume of a sample of bromine is measured in a 50 beaker and a 100 ml beaker. How w

ill the two measurements compare ?
Physics
1 answer:
Stells [14]3 years ago
5 0

Answer:

The comparisons are;

The height of the bromine in the 50 ml beaker will be twice that of the 100 ml beaker

The measurement of the volume with the 50 ml beaker will be more accurate than the measurement taken with the 100 ml beaker, because the differences in the height of the bromine in the 50 ml beaker is more obvious than the differences measured with the 100 ml beaker.

The actual volume of bromine in both beakers will be equivalent

Explanation:

The properties of a liquid are;

1) The volume of a liquid is relatively fixed at conditions that are suitable for it to remain in the liquid state compared to the volume occupied by a gas

2) A liquid will assume the shape of a container in which it is placed

3) The surface of a liquid in a container is flat due in order that the attractive forces between the molecules of the liquid at the surface and inside the body of the liquid should be in equilibrium

Therefore, given that the volume of the Bromine is measured in 50 ml beaker and a 100 ml beaker, there will be differences in the measured height of the same volume of bromine in each beaker.

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In tae-kwon-do, a hand is slammed down onto a target at a speed of 10 m/s and comes to a stop during the 7.0 ms collision. Assum
wlad13 [49]

Answer:

(A) Impulse = 9Ns

(B) F = 1286N

Explanation:

Impulse = change in momentum = m(v-u)

v = 0 (the hand comes to a stop)

u = -10m/s

Mass = 0.9kg

Impulse = 0.9 ×(0- (-10))

= 9Ns

(B) F×t = Impulse

F = Impulse/ t

t = 7ms = 7×10-³

F = 9/ (7×10-³)

F = 1286N.

5 0
3 years ago
Atomic nuclei are made of protons and neutrons. This fact by itself shows thatthere must be some other type of force in addition
Stells [14]

Protons and neutrons are packed together in a very small region called nucleus. Protons are positively charged and we know that like charges repel. Then how is it that protons are not repelling each other and flying away from nucleus?

You may think that gravitational force is holding all the protons together but it is not so. Gravitational force is many times weaker than repulsive force.

It is actually strong force which holds proton together. At this short distance, strong force comes into play and is several times stronger than the repulsive force.

5 0
4 years ago
A capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has radius 10.5 cm,
Step2247 [10]

Answer:

U = 2.91 *10^{-5} J

Explanation:

energy density can be obtained as

U = \frac{1}{2}\epsilon_o E^{2}

Where,

E is electric field = \frac{kQ}{R^{2}}

K COLOUMB CONSTANT =8.99*10^{9} N -m2 /C2

Q is charge = CV

C is capacitance = 4\pi \epsilon_o \frac{r_1 r_2}{r_2 -r_1}

                             =4\pi *8.85*10^{-12} [\frac{10.5*16.5}{16.5 -10.5}]

                           = 3.21*10^{-9} F

Q = 3.21*10^{-9} *150 = 4.81*10^{-7] C

for r  = 10.6 cm

E = \frac{8.99*10^{9}*3.21*10^{-9}}{0.106^{2}}

E = 2568.34 N/C

U = \frac{1}{2}\epsilon_oE^{2}

U = \frac{1}{2}*8.85*10^{-12} *2568.34 ^2

U = 2.91 *10^{-5} J

8 0
3 years ago
An electron with a speed of 1.9 × 107 m/s moves horizontally into a region where a constant vertical force of 4.9 × 10-16 N acts
Nimfa-mama [501]

Explanation:

It is given that,

Speed of the electron in horizontal region, v=1.9\times 10^7\ m/s

Vertical force, F_y=4.9\times 10^{-16}\ N

Vertical acceleration, a_y=\dfrac{F_y}{m}

a_y=\dfrac{4.9\times 10^{-16}\ N}{9.11\times 10^{-31}\ kg}  

a_y=5.37\times 10^{14}\ m/s^2..........(1)

Let t is the time taken by the electron, such that,

t=\dfrac{x}{v_x}

t=\dfrac{0.024\ m}{1.9\times 10^7\ m/s}

t=1.26\times 10^{-9}\ s...........(2)

Let d_y is the vertical distance deflected during this time. It can be calculated using second equation of motion:

d_y=ut+\dfrac{1}{2}a_yt^2

u = 0

d_y=\dfrac{1}{2}\times 5.37\times 10^{14}\ m/s^2\times (1.26\times 10^{-9}\ s)^2

d_y=0.000426\ m

d_y=0.426\ mm

So, the vertical distance the electron is deflected during the time is 0.426 mm. Hence, this is the required solution.

3 0
3 years ago
Read 2 more answers
Liquid water has surface tension, has a high specific heat, and functions effectively as a solvent for polar covalent and ionica
MrRissso [65]

Answer:

The property to form polar covalent bond and hydrogen bonds

Explanation:

Liquid water exhibits the property of surface tension, functions as solvent for ionic and polar covalent bonded molecules and have high specific heat.

All these properties can be credited to the property of water to form hydrogen bonds with liquid water molecules where the hydrogen bonding results when hydrogen atom of a water molecule is attracted to a more electro negative oxygen atom of other water molecule in the neighborhood while polar covalent bond formation results in the the water molecule as it is a polar covalent molecule as it contains hydrogen atom and an electronegative oxygen atom which results in the charge distribution in the molecule.

3 0
3 years ago
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