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Law Incorporation [45]
3 years ago
12

Ned is learning about cells in science class. He drew a picture to model a cell. What can he show with his cell drawing?

Physics
2 answers:
Tems11 [23]3 years ago
5 0

Answer:

The answer is D, what the cell parts are.

Explanation:

ICE Princess25 [194]3 years ago
3 0

Answer:I need the answer pls

Explanation:

I don't have one

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a force of 35N is exerted over a cylinder with an area of 5m^2. What pressure,in pascals, will be transmitted in the hydraulic s
gayaneshka [121]

Answer:

<h3>The answer is 7 Pa</h3>

Explanation:

The pressure transmitted in the hydraulic system can be found by using the formula

p =  \frac{f}{a}  \\

f is the force

a is the area

From the question we have

p =  \frac{35}{5}  \\

We have the final answer as

<h3>7 Pa</h3>

Hope this helps you

8 0
2 years ago
A radio transmitting station operating at a frequency of 120 MHz has two identical antennas that radiate in phase. Antenna B is
Maksim231197 [3]

Correct question:

A radio transmitting station operating at a frequency of 120 MHz has two identical antennas that radiate in phase. Antenna B is 9.05 m to the right of antenna A. Consider point P between the antennas and along the line connecting them, a horizontal distance x to the right of antenna A.

For what values of x will constructive interference occur at point P?

Answer:

values of x in which constructive interference will occur at point P are; 0.775 m, 2.025 m, 3.275 m, 4.525 m, 5.775 m, 7.025 m, 8.275 m

Explanation:

Given;

frequency, F = 120 MH = 120 x 10⁶ Hz

distance between A and B = 9.05 m

make a sketch of this antenna

A-------------------P------------------B

         x                      9.05 - x

Now, we calculate the wavefront between the two antenna

λ = v/f

where;

v is speed of light = 3 x 10⁸ m/s

λ = (3 x 10⁸) / (120 x 10⁶)

λ = 2.5 m

Thus, the constructive interference = n(2.5)

For constructive interference to occur at point P, then

the path difference = constructive interference

Path difference = 9.05 - x - x

                          = 9.05 -2x

∴ 9.05 - 2x = n(2.5)

2x =  9.05 - n(2.5)

x = 4.525 - n(1.25)

Finally, determine the value of x for which n = -1, -2, -3 and 0, 1, 2, 3

when n = -1

x = 4.525 + 1(1.25)

x = 5.775m

when n = -2

x = 4.525 + 2(1.25)

x = 7.025m

when n = -3

x = 4.525 + 3(1.25)

x = 8.275m

when n = 0

x = 4.525 - 0(1.25)

x = 4.525m

when n = 1

x = 4.525 - 1(1.25)

x = 3.275m

when n = 2

x = 4.525 - 2(1.25)

x = 2.025m

when n = 3

x = 4.525 - 3(1.25)

x = 0.775m

Thus, values of x in which constructive interference will occur at point P are; 0.775 m, 2.025 m, 3.275 m, 4.525 m, 5.775 m, 7.025 m, 8.275 m

4 0
3 years ago
The 49-g arrow is launched so that it hits and embeds in a 1.45 kg block. The block hangs from strings. After the arrow joins th
Dimas [21]

Answer:

the initial speed of the arrow before joining the block is 89.85 m/s

Explanation:

Given;

mass of the arrow, m₁ = 49 g = 0.049 kg

mass of block, m₂ = 1.45 kg

height reached by the arrow and the block, h = 0.44 m

The gravitational potential energy of the block and arrow system;

P.E = mgh

P.E = (1.45 + 0.049) x 9.8 x 0.44

P.E = 6.464 J

The final velocity of the system after collision is calculated as;

K.E = ¹/₂mv²

6.464 = ¹/₂(1.45 + 0.049)v²

6.464 = 0.7495v²

v² = 6.464 / 0.7495

v² = 8.6244

v = √8.6244

v = 2.937 m/s

Apply principle of conservation of linear momentum to determine the initial speed of the arrow;

P_{initial} = P_{final}\\\\mv_{arrow} + mv_{block} = (m_1 + m_2)V\\\\0.049(v) + 1.45(0) = (0.049 + 1.45)2.937\\\\0.049v = 4.4026\\\\v = \frac{4.4026}{0.049} \\\\v = 89.85 \ m/s

Therefore, the initial speed of the arrow before joining the block is 89.85 m/s

4 0
2 years ago
Pls answer 9 Through 12
belka [17]

Answer:

physics,chemistry,biology,astronomy and earht sciences

principles of science are integrity of knowledge honesty,collegiality(cooperation between colleagues) objectivity and openness

examples of science are actually branches of science so those are biology,mathematics,chemistry and physics etc

science is importent to provide our basic needs and to improve our living standard.It makes our life much easier by providing different technologies.It helps in the diagnosing and treatment of a disease

4 0
3 years ago
A downhill skier reaches the steepest part of a trail. Her speed increases from 9 m/s to 18 m/s in 3 seconds. What is her averag
Cerrena [4.2K]

Answer:

3m/s²

Explanation:

final velocity - initial velocity

______________________ = Acceleration

           elapsed time

8 0
2 years ago
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