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3 years ago

Please help

Physics

2 answers:

irga5000 [103]3 years ago

6 0

Answer:

the answer is B

Explanation:

Dababy told me it was right. If you get it wrong "Blame it on Baby" let's go

kvasek [131]3 years ago

4 0

Answer:

the answer is a ,The amount of work that is done is increased.

Explanation:

Please mark me brainliest

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A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0 g steel wire. When the wind blows hard, the wire hums at it

kupik [55]

Answer: The mass of the sculpture is 11.8kg

Explanation:

Using the equation of fundamental frequency of a taut string.

f = (1/2L)*√(T/μ) .... (Eqn1)

Where

f= frequency in Hertz =80Hz

T = Tension in the string = Mg

M represent the mass of the substance (sculpture) =?

g= 9.8m/s^2

L= Length of the string=90cm=0.9m

μ= mass density = mass of string /Length of string

mass of string =5g=0.005kg

L=0.9m

μ=0.005/0.9 = 0.0056kg/m

Using (Eqn1)

80= 1/(2*0.9) √(T/0.0056)

144= √(T/0.0056)

Square both sides

20736= T/0.0056

T= 116.12N

Recall that T =Mg

116.12= M * 9.8

M=116.12/9.8

M= 11.8kg

Therefore the mass of the sculpture is 11.8kg

4 0

3 years ago

Find the frequency if the period is 15 us.

Sav [38]

Answer:

The frequency is $0.667$ × $10^{6}$ $Hz$ .

Explanation:

Period is defined as the time taken by any element to attempt one complete oscillatory motion in one second.
Frequency is the number of complete oscillations made in one second.

Frequency and period are inversely proportional to each other.

In mathematical term: $frequency$ = $\frac{1}{period}$ .
As we are given, $period$ = $15$ × $10^{-6}$ $s$ .
We can easily calculate frequency as: $f\\$ = $\frac{1}{15. 10^{-6} }$
So frequency is $f$ = $0.667$ × $10^{6}$ $Hz$ .

6 0

3 years ago

S To minimize neutron leakage from a reactor, the ratio of the surface area to the volume should be a minimum. For a given volum

goblinko [34]

To minimize neutron leakage from a reactor, the ratio of the surface area to the volume should be a minimum. For a given volume V , ratio for (c) a parallelepiped of dimensions × 2 a will be $\frac{6.29961}{c^\frac{1}{3} }$

What will be the ratio of surface area and the volume of the parallelepiped

We will proceed by stating the equations of the surface area and the volume of each shape, and then identifying each of the surface area and the volume, we will take their ratios, and as it is asking for the shape which has the minimum surface area to volume ratio, therefore at some given volume, $V=const$ .

The parallelepiped whose dimension is given as

$2a,a,a$

the surface area and the volume is given respectively by:

$A=2(2a \times a)+2(a \times 2a)+2(a \times a)=10a^{2}$

$V=2a^{3}$

Let the volume be equal to the constant c, we get:

$V=c=2a^{3}\\a=(\frac{c}{2} )^\frac{1}{3}$

Hence the ratio is given by:

$\frac{A}{V} =\frac{10a^{2}}{2a^{3}}=\frac{5}{a}$

Calculating the constants, by substituting the value of $a$ in (3), we get:

$\frac{A}{V}=\frac{6.29961}{c^\frac{1}{3} }$

To learn more about parallelepiped, refer to:

brainly.com/question/27975136

#SPJ4

5 0

1 year ago

You are given two temperatures for substance: one is the melting point and one is the boiling point. How do you determine which

Sergio039 [100]

melting point is where the substance is melting and turning from a solid to a liquid.

boiling point is where molecules vibrate and produce energy which makes the water hot and becomes a boil.

8 0

4 years ago

What is the definition of

marysya [2.9K]

Upper fixed point is a temperature of stem from water boiling and standards atmospheric pressure

Lower fixed point is the temperature of pure melting ice.

8 0

3 years ago