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3 years ago

The trajectory of a projectile always ________________.

Physics

1 answer:

sattari [20]3 years ago

8 0

Answer:

c) curves downward, below the initial velocity vector

Explanation:

A projectile is usually launched from a height, where it is launched with an initial velocity. From that point the gravitational force begins to act on the projectile causing it to decay. As time passes, the projectile advances but its height decreases. So its trajectory is curved downward, below the initial velocity vector.

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If the voltage impressed across a circuit is held constant while the resistance doubles, what change occurs in the current?

bazaltina [42]

Answer:

The current halves

Explanation:

The relationship between voltage, current and resistance in a circuit is given by Ohm's law:

$V=RI$

where

V is the voltage

R is the resistance

I is the current

We can rewrite the formula as

$I=\frac{V}{R}$

we see that I is directly proportional to V and inversely proportional to R. In this problem, V is held constant while R is doubled:

$R'=2R$

so, the new current in the circuit will be

$I'=\frac{V}{R'}=\frac{V}{2R}=\frac{1}{2}I$

So, the current halves.

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4 years ago

Assume you have an ice cube and also a small rock that is the same size and shape as the ice cube. Predict what would happen if

Step2247 [10]

Answer: The ice cube would float on top of the water and the rock would sink to the bottom.

Explanation: The ice cube has a smaller density than the rock which allows the ice cube to float but makes the rock sink to the bottom of the glass of water.

7 0

3 years ago

The meaning of LIFE!

shtirl [24]

Meaning of life ....
condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.

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3 years ago

It uses a series of filters to decompose the multiplexed signals into its constituent component signals. a. Demodulator b. Demul

harkovskaia [24]

Answer:

b) Demultiplexer.

Explanation:

The multiplexed signal occupies the total bandwidth of the communications channel, while that the constituent component signals, occupy only a small part of the bandwidth.

Prior to be demodulated, they must be separated each other, which is done (in a FDM multiplexing scheme) using a series of band-pass filters.

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4 years ago

A researcher measures the thickness of a layer of benzene (nn = 1.50) floating on water by shining monochromatic light onto the

baherus [9]

Answer:

The minimum thickness is $t= 8.75*10^{-8} m$