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3 years ago

Speed is different from velocity because

Physics

2 answers:

shtirl [24]3 years ago

6 0

Answer:

A. velocity has a direction .. .

with magnitude too but speed has only magnitude

Olin [163]3 years ago

4 0

Answer:

Explanation:

Speed doesnt have a direction, it is a type of measurement while velocity is the rate and direction that something is going

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NASA has asked your team of rocket scientists about the feasibility of a new satellite launcher that will save rocket fuel. NASA

kkurt [141]

Answer:

The answer is " $q=0.0945\,C$ ".

Explanation:

Its minimum velocity energy is provided whenever the satellite(charge 4 q) becomes 15 m far below the square center generated by the electrode (charge q).

$U_i=\frac{1}{4\pi\epsilon_0} \times \frac{4\times4q^2}{\sqrt{(15)^2+(5/\sqrt2)^2}}$

It's ultimate energy capacity whenever the satellite is now in the middle of the electric squares:

$U_f=\frac{1}{4\pi\epsilon_0}\ \times \frac{4\times4q^2}{( \frac{5}{\sqrt{2}})}$

Potential energy shifts:

$= U_f -U_i \\\\ =\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{\sqrt2}{5}-\frac{1}{\sqrt{(15)^2+( \frac{5}{\sqrt{2})^2)}}\right ) \\\\ =\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{\sqrt2}{5}-\frac{1}{ 15 +( \frac{5}{2})}}\right )\\\\ =\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{\sqrt2}{5}-\frac{1}{ (\frac{30+5}{2})}}\right )\\\\$

$=\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{\sqrt2}{5}-\frac{1}{ (\frac{35}{2})}}\right )\\\\=\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{\sqrt2}{5}-\frac{1}{17.5}}\right )\\\\ =\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{ 24.74- 5 }{87.5}}\right )\\\\ =\frac{16q^2}{4\pi\epsilon_0}\left ( \frac{ 19.74- 5 }{87.5}}\right )\\\\ =\frac{4q^2}{\pi\epsilon_0}\left ( 0.2256 }\right )\\\\= \frac{0.28 \times q^2}{ \epsilon_0}\\\\=q^2\times31.35 \times10^9\,J$

Now that's the energy necessary to lift a satellite of 100 kg to 300 km across the surface of the earth.

$=\frac{GMm}{R}-\frac{GMm}{R+h} \\\\=(6.67\times10^{-11}\times6.0\times10^{24}\times100)\left(\frac{1}{6400\times1000}-\frac{1}{6700\times1000} \right ) \\\\ =(6.67\times10^{-11}\times6.0\times10^{26})\left(\frac{1}{64\times10^{5}}-\frac{1}{67\times10^{5}} \right ) \\\\=(6.67\times6.0\times10^{15})\left(\frac{67 \times 10^{5} - 64 \times 10^{5} }{ 4,228 \times10^{5}} \right ) \\\\$

$=( 40.02\times10^{15})\left(\frac{3 \times 10^{5}}{ 4,228 \times10^{5}} \right ) \\\\ =40.02 \times10^{15} \times 0.0007 \\\\$

$\\\\ =0.02799\times10^{10}\,J \\\\= q^2\times31.35\times10^{9} \\\\ =0.02799\times10^{10} \\\\q=0.0945\,C$

This satellite is transmitted by it system at a height of 300 km and not in orbit, any other mechanism is required to bring the satellite into space.

6 0

3 years ago

If you go to a nutrition store and buy a supplement you can count on the fact that it is pure and safe because supplements are r

likoan [24]

Answer:

The answer is False.

Explanation: The FDA (food and drug administration) is a regulatory agency of the United state Government, they regulate the production and distribution of food and drugs within the United States of America, ensuring that standards are met and followed.

Most of the approvals given to food and drugs by FDA are done based on random sampling of products which may not be able to capture all the defective products in a given lot or batch of supplies, which is why it very necessary to take other measures to verify the wholesomeness, authenticity etc of a given product before purchasing or making use of such products.

5 0

3 years ago

Read 2 more answers

What is the Range of the projectile motion?

never [62]

Answer:

Range of projectile, R

For projection above ground surface, the range of the angle of projection with respect to horizontal direction, θ, is 0° ≤ θ ≤ 90° and the corresponding range of 2θ is 0° ≤ 2θ ≤ 180°.S

hope you're looking for this.

4 0

3 years ago

Read 2 more answers

2. Which best represents a physical property of a

Svet_ta [14]

B) Gold has a density of 19.3 g/cm3

4 0

3 years ago

Block A is set on a rough horizontal table and is connected to a horizontal spring that is fixed to a wall, as shown.

VikaD [51]

The mechanical energy of the system is sum of the potential and kinetic

energy of the system.

Response:

E1 increases, E2 decreases

<h3>Methods by which the the above response is obtained</h3>

Mechanical energy, M.E. in the block and spring system can be presented as follows;

M.E. = Energy in the spring + Kinetic energy of the blocks + Energy done on friction

Mechanical energy of the block-spring system, E1

When the blocks are held at rest;

The mechanical energy in the block-spring system when the blocks are held at rest can be found as follows;

Energy in the spring = 0

Kinetic energy of the blocks = 0

Friction energy = 0

Therefore;

E1 for the block at rest = 0

E1 when the blocks come to rest again

Energy in the spring = $\mathbf{\frac{1}{2} \cdot k \cdot x^2}$ > 0

Kinetic energy = 0

Energy of friction = 0

Therefore;

The mechanical energy of the block-spring system, E1, increases

The mechanical energy of the block-spring-Earth system, E2

When the blocks are held

Energy in the spring = 0

Energy done due to friction = 0

Potential energy of Block B = m·g·h

Kinetic energy of the blocks = 0

When the blocks come to rest again, we have;

Energy in the spring = $\frac{1}{2} \cdot k \cdot x^2$

Energy received due to friction = 0

Potential energy of Block B = m·g·(h - y)

Where;

$m \cdot g \cdot h = \mathbf{m \cdot g \cdot (h - y) + \frac{1}{2} \cdot k \cdot x^2 + Energy \ loss \ due \ to \ friction}$

Which gives;

$m\cdot g \cdot h > m \cdot g \cdot (h - y) + \frac{1}{2} \cdot k \cdot x^2$

The energy in the spring-block-Earth system, E2, when initially held is more than the the energy when the blocks com to rest again.

Therefore, E2 decreases

The correct option is therefore;

E1 increases, E2 decreases

The possible question options obtained from a similar question posted online are;

E1 increases, E2 decreases

E1 decreases, E2 increases

E1 is constant, and E2 decrease

E1 and E2 remain constant

Learn more about mechanical energy here;

brainly.com/question/5398294

7 0

2 years ago