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3 years ago

Match the measurement with the proper Sl unit Acceleration: Velocity Distance:

Physics

2 answers:

Ket [755]3 years ago

6 0

Answer:

Acceleration - ms^-2

Velocity- ms^-1

Distance-m

Xelga [282]3 years ago

3 0

Answer:

Acceleration:

$m/s^{2}$

Velocity:

$m/s$

Distance:

$m$

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A coin is dropped into a wishing well. It takes 1.1 seconds for a splash to be heard. Calculate the depth of the wishing well

Zigmanuir [339]

Answer:

If the wishing well was in a vacuum, then s=ut + 0.5 a t^2 (s=distance, ... wishing well if you drop a coin into it and hear the splash 10 seconds

Explanation:

8 0

3 years ago

A resistor of 5 Ω is placed in a circuit. The voltage drop across the resistor is 12 V. What is the current through the resistor

Kaylis [27]

Data:

R = 5 Ω
U = 12 V
i = ?

Formula:

 $U = R*i$ → $i = \frac{U}{R}$ 

Solving:

 $i = \frac{U}{R}$
$i = \frac{12}{5}$
$\boxed{i = 2.4A}$

Answer:

The current through the resistor is 2.4 Amperes

5 0

3 years ago

A machinist measures the length of a bolt. The length is 72.22 cm. What is the length in millimeters?

pochemuha

Answer:

The length of the bolt in millimeters is 722.2 mm

Explanation:

Given;

length of the bolt in centimeters, = 72.22 cm

The length of the bolt in millimeters is given by;

Multiply the length by 10

= 72.22 cm x 10

= 722.2 mm

Therefore, the length of the bolt in millimeters is 722.2 mm

7 0

3 years ago

The hydrogen atom, changing from its first excited state to its lowest energy state, emits light with a wavelength of 122 nm. Th

tiny-mole [99]

Answer:

c. There would be a series of spectral lines in hydrogen with the longest wavelength one at 122 nm.

d. The hydrogen atom binds its electron more tightly than the sodium atom does, and would require more energy to remove its electron completely.

Explanation:

The hydrogen atom which changes from the excited state to the lower ground state, it emits light having a wavelength of 122 m. And the sodium atom also gets excited and emits light at 589 nm when it moves from the 1st excited state to the lowest excited state.

Therefore, when the electrons jumps from the 1st excited state to the ground state, only one wavelength is observed as there is only one transition.

The hydrogen atom will bind the electron tightly but the sodium atom does not and would require more energy to remove the electron the electron completely as the binding energy is higher when the electron is closer to the nucleus.

5 0

3 years ago

A copper wire loop has a circular shape, with a radius a (see below). The loop is put perpendicularly to the uniform magnetic fi

Luda [366]

Answer:

fem = -A β

Explanation:

Faraday's law gives the induced electromotive source (emf)

fem = $- \ \frac{d \phi_B }{dt}$

the magnetic flux is

$\phi_B$ = B. A = B A cos θ

the bold are vectros. In this case the normal to the ring is parallel to the magnetic field so the angle is zero cos 0 = 1, also the area of the ring is constant

fem = -A $\frac{dB}{dt}$

we carry out the derivative of the function B = α + β t

fem = -A β

so we see that there is an electromotive force in the ring.

5 0

3 years ago