3 years ago

At the maximum height of a projectile’s trajectory—

2 answers:

7 0

Well, a, c, and d are all true, but the simple reason is that the velocity is zero at the top of the flight. The best, simplest answer is 'a'.

uranmaximum [27]3 years ago

5 0

D. Cross product of velocity & amp; acceleration is 0

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Name two elements that have similar properties. How can you tell using the periodic table?

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Helium and nitrogen because they are both from the noble gas group.

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4 years ago

Two large metal plates of area 0.7 m2 face each other. They are 5.1 cm apart and have equal but opposite charges on their inner

german

Explanation:

The given data is as follows.

Area (A) = 0.7 $m^{2}$ .

Electric field between the plates, (E) = 55 N/C

Since, electric field is related to surface charge density as follows.

$\sigma = \frac{Q}{A}$

Also, E = $\frac{\sigma}{\epsilon_{o}}$

or, $\sigma = \epsilon_{o} E$

Therefore, charge will be calculated as follows.

Q = $\sigma \times A = \epsilon_{o} E \times A$

= $8.854 \times 10^{-12} \times 55 \times 0.7$

= $3.41 \times 10^{-10} C$

= 341 pC

Thus, we can conclude that magnitude of the charge on each plate is 341 pC.

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4 years ago

State and explain the law of reflection

Nastasia [14]

The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection.

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3 years ago

A cruise ship has a mass of 100,000,000 kg and a kinetic energy of 5,000,000 kJ. Calculate the speed of the cruise ship.

KiRa [710]

Explanation:

K.E = 5,000,000 KJ

MASS = 100,000,000 Kg

K.E = 1/2 MV^2

$5000000 = \frac{1}{2} \times 100000000 \times v {}^{2}$

$5000000 = 50000000 \times v {}^{2}$

$v {}^{2} = \frac{5000000}{50000000}$

$v {}^{2} = \frac{5}{50}$

therefore

$v {}^{2} = \frac{1}{10}$

$v = \sqrt{0.1}$

v = 0.316 m/s^2

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3 years ago

Determine what forces are present in this situation: An elevator is rising at a constant speed; the elevator is the object in th

Alecsey [184]

Tension pointing up at the top Weight pointing down at the bottom If there is someone standing inside the elevator, there will be a normal reaction force pointing down at the bottom.

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3 years ago

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