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3 years ago

IF YOU GET GOOD GRADES ON SCIENCE TESTS PLEASE HELP ME!!!!!

Physics

2 answers:

ruslelena [56]3 years ago

7 0

Answer:

Explanation:

The sound wave hits the apartment complex first.

im sure this is physics and not science

Elena-2011 [213]3 years ago

5 0

Answer:

A i think hope this helps

Explanation:

You might be interested in

The human eye is most sensitive to green light of wavelength 505 nm . Experiments have found that when people are kept in a dark

liq [111]

1. $5.94\cdot 10^{14} Hz$

The frequency of a photon is given by:

$f=\frac{c}{\lambda}$

where

c is the speed of light

$\lambda$ is the wavelength

The wavelength of the photon in this problem is

$\lambda=505 nm=5.05\cdot 10^{-7}m$

So, the frequency of the photon is

$f=\frac{3\cdot 10^8 m/s}{5.05\cdot 10^{-7} m}=5.94\cdot 10^{14} Hz$

2. $3.94\cdot 10^{-19}J, 2.46 eV$

The energy of a photon is given by

$E=hf$

where

h is the Planck constant

f is the frequency of the photon

The frequency of the photon in this problem is

$f=5.94\cdot 10^{14} Hz$

so its energy in Joules is

$E=(6.63\cdot 10^{-34}Js)(5.94\cdot 10^{14}Hz)=3.94\cdot 10^{-19}J$

And since

$1 eV = 1.6\cdot 10^{-19}J$

The energy in eV is

$E=\frac{3.94\cdot 10^{-19} J}{1.6\cdot 10^{-19}J/eV}=2.46 eV$

7 0

3 years ago

As the car moves from point A , to point B, and finally to point C, the total energy of the car

Minchanka [31]

Answer: C

Explanation:

Energy stays the same, but there’s more kinetic energy the less it moves and mor kinetic energy the more it moves

3 0

3 years ago

Which imaging technique uses radiation that is emitted from the material being imaged

garri49 [273]

Answer:

Positron emission tomography. Positron emission tomography (PET) is an imaging technique that uses radioactive substances to visualize and measure metabolic processes in the body.

4 0

4 years ago

Read 2 more answers

Will a vector at 45 degrees to the horizontal be larger or smaller than its horizontal and vertical components? By how much?

never [62]

Larger. How big depends on the size of the vector. But think about pythagoras theorem to solve for the vector.

8 0

3 years ago

If one doubles the emfs in a circuit and doubles the resistances in the circuit at the same time, what happens to the currents t

bija089 [108]

Answer:

Same

Explanation:

Let R be the resistance of the cell and E be the emf.

Let i be the current in the circuit.

i = E / R ..... (1)

Now emf and resistance be doubled.

so, i' = 2E/2R = E/R

So, i' = i (From equation (1)

Current remains same.

3 0

3 years ago