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4 years ago

Which of the following statement best define tides?

Physics

2 answers:

Korvikt [17]4 years ago

3 0

The rise and fall of ocean water that occurs about every12.5 hours

labwork [276]4 years ago

3 0

It's c because tides are like normal waves that are caused by combined efforts of gravity and rotation.

You might be interested in

You do 45 j of work in 3 seconds. how much power do you use

Oliga [24]

Answer:

Force= work done/time taken

so, 45j/3s

force= 15 N

Explanation:

8 0

4 years ago

Suppose that the electric field in the Earth's atmosphere is E = 131 N/C, pointing downward. Determine the electric charge (in C

alisha [4.7K]

Answer:

the electric charge in the Earth is -5.91 × 10⁵ C

Explanation:

Given the data in the question;

Electric field E = 131 N/C

we know that; radius of the earth r = 6,371 km = 6371000 m

and Coulomb's constant k = 8.99 × 10⁹ Nm²/c²

Now, using the following formula to calculate the charge;

E = k × Q/r²

we make Q the subject of the formula

Q = Er² / k

so we substitute

Q = [ 131 N/C × ( 6371000 m )² ] / 8.99 × 10⁹ Nm²/c²

Q = [ 5.317242971 × 10¹⁵ ] / [ 8.99 × 10⁹ ]

Q = 5.91 × 10⁵ C

Since the electric field pointing downward

Q = -5.91 × 10⁵ C

Therefore, the electric charge in the Earth is -5.91 × 10⁵ C

6 0

3 years ago

Fifteen identical particles have various speeds: one has a speed of 2.00 m/s, two have speeds of 3.00 m/s, three have speeds 5.0

Tems11 [23]

A. Average speed is weighted mean (1 × 2 + 2 × 3 + 3 × 5 + 4 × 7 + 3 × 9 + 2 × 12.5)/15 = (2 + 6 + 15 + 28 + 27 + 25)/15 = 103/15 = 6.867 b. RMS is square root of 1/15 times sum of squares of speeds Sum of squares is 4 + 9 + 9 + 25 + 25 + 25 + 49 + 49 + 49 + 49 + 81 + 81 + 81 +156.25 + 156.25 = 848.5
c. RMS speed = √(848.5/15) = 7.521
Most likely the speed is the peak in the speed distribution, which is 7.

5 0

3 years ago

A current of 1.75 A flows through a 55.4 Ω resistor for 9.5 min. How much heat was generated by the resistor? Answer in units of

kirill115 [55]

Answer:

$9.67\times 10^4 J$

Explanation:

We are given that

Current=I=1.75 A

Resistance =R=55.4 ohm

Time=t=9.5 min= $9.5\times 60=570 s$

1 min=60 s

We have to find the heat generated by the resistor.

We know that

Heat=E= $I^2Rt$

Using the formula

Heat, $E=(1.75)^2\times 55.4\times 570=9.67\times 10^{4} J$

Hence, the heat generated by the resistor = $9.67\times 10^4 J$

6 0

3 years ago

The electric field in a region is uniform (constant in space) and given by E-( 148.0 1 -110.03)N/C. An additional charge 10.4 nC

Alexandra [31]

Answer:

$-1.144\ \mu C$

Explanation:

<u>Given:</u>

$\vec{E}$ = uniform electric field in the space = $(148.0\ \hat{i}-110.0\ \hat{j})\ N/C$

Q = Charge placed in the region = $10.4 nC\ = 1.04\times 10^{-8}\ nC$

<u>Assume:</u>

$\vec{F}$ = Electric force on the charge due to electric field

We know that the electric field is the electric force applied on a unit positive charge i.e.,

$\vec{E}=\dfrac{\vec{F}}{Q}$

This means the electric force applied on this additional charge placed in the field is given by:

$\vec{F}=Q\vec{E}\\\Rightarrow \vec{F} = 1.04\times 10^{-8}\ n C\times (148.0\ \hat{i}-110.0\ \hat{j})\ N/C\\\Rightarrow \vec{F} = (1.539\ \hat{i}-1.144\ \hat{j})\ \mu N\\$

From the above expression of force, we have the following y-component of force on this additional charge.

$F_y = -1.144\ \mu N$

Hence, the y-component of the electric force on the this charge is $-1.144\ \mu N$ .

7 0

4 years ago