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3 years ago

Which property of waves is the distance between one point on a wave and that same point on the wave next to it?

1 answer:

6 0

The correct answer is "wavelength". In fact, the wavelength of a wave is defined as the distance between two consecutive corresponding points of the wave: for instance, the distance between two consecutive crests, or the distance between two consecutive throughs.

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Why is granite often used in monuments

zimovet [89]

Its often used for monuments because of its beauty and its variety of colors

8 0

3 years ago

Read 2 more answers

A 35 kg child goes down a playground that is inclined at an angle of 27.5 degrees above the horizontal. Find the acceleration if

tigry1 [53]

Answer:

4.16m/s²

Explanation:

According to Newtons second law;

$\sum Fx = ma_x\\Fm - Ff = ma_x\\W sin\theta - \mu R cos \theta = ma_x\\mg sin\theta - \mu mg cos\theta = ma_x\\$

Fm is the moving force

$\mu$ is the coefficient of kinetic friction between the child and the slide

m is the mass

g is the acceleration due to gravity

a is the acceleration of the child

Substitute the given values and get the acceleration as shown;

35(9.8)sin27.5 - 0.415(35)(cos27.5) = 35a

158.38-12.88 = 35a

145.49 = 35a

a = 145.49/35

a = 4.16m/s²

Hence the acceleration of the body is 4.16m/s²

4 0

3 years ago

Consider a heat engine that inputs 10 kJ of heat and outputs 5 kJ of work. What are the signs on the total heat transfer and tot

Oksi-84 [34.3K]

Answer:

Total heat transfer is positive

Total work transfer is positive

Explanation:

The first law of thermodynamics states that when a system interacts with its surrounding, the amount of energy gained by the system must be equal to the amount of energy lost by the surrounding. In a closed system, exchange of energy with the surrounding can be done through heat and work transfer.

Heat transfer to a system is positive and that transferred from the system is negative.

Also, work done by a system is positive while the work done on the system is negative.

Therefore, from the question, since the heat engine inputs 10kJ of heat, then heat is being transferred to the system. Hence, the sign of the total heat transfer is positive (+ve)

Also, since the heat engine outputs 5kJ of work, it implies that work is being done by the system. Hence the sign of the total work transfer is also positive (+ve).

5 0

3 years ago

A 22 µF capacitor charged to 0.7 kV and a second 115 µF capacitor charged to 5.5 kV are connected to each other, with the positi

vesna_86 [32]

Answer:

0.099C

Explanation:

First, we need to get the common potential voltage using the formula

$V=\frac {C_2V_2-C_1V_1}{C_1+C_2}$

Where V is the common voltage, C and V represent capacitance and charge respectively. Subscripts 1 and 2 to represent the the first and second respectively. Substituting the above with the following given values then

$C_1=22\times 10^{-6} F\\ C_2=115\times 10^{-6} F\\ V_1= 0.7\times 10^{3}\\V_2=5.5\times 10^{3}$

Therefore

$V=\frac {115\times 10^{-6}\times 5.5\times 10^{3}-22\times 10^{6}\times 0.7\times 10^{3}}{22\times 10^{-6}+115\times 10^{-6}}=4504.3795620437$

Charge, Q is given by CV hence for the first capacitor charge will be $Q_1=C_1V$

Here, $Q_1=22\times 10^{-6}\times 4504.3795620437=0.0990963503649C\approx 0.099C$

8 0

3 years ago

A particle moves along a path described by y=Ax^3 and x = Bt, where tt is time. What are the units of A and B?

Sergeu [11.5K]

Answer:

In a nutshell, units of A and B are $\frac{1}{[l]^{2}}$ and $\frac{[l]}{[t]}$ , respectively.

Explanation:

From Dimensional Analysis we understand that $x$ and $y$ have length units ( $[l]$ ) and $t$ have time units ( $[t]$ ). Then, we get that:

$[l] = A\cdot [l]^{3}$ (Eq. 1)

$[l] = B\cdot [t]$ (Eq. 2)

Now we finally clear each constant:

$A = \frac{[l]}{[l]^{3}}$

$A = \frac{1}{[l]^{2}}$

$B = \frac{[l]}{[t]}$

In a nutshell, units of A and B are $\frac{1}{[l]^{2}}$ and $\frac{[l]}{[t]}$ , respectively.

4 0

4 years ago