4 years ago

Identify the two pieces of information you need to know the velocity of an object.

1 answer:

8 0

To determine the velocity of an object, you would need to know it's magnitude and direction, because velocity is the speed is a certain direction.

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he work function of a certain metal is 1.90 eV. What is the longest wavelength of light that can cause photoelectron emission fr

bixtya [17]

Answer:

6538.8 Angstrom

Explanation:

work function, w = 1.9 eV = 1.9 x 1.6 x 10^-19 J = 3.04 x 10^-19 J

Let the longest wavelength is λ.

W = h c / λ

λ = h c / W

λ = (6.626 x 10^-34 x 3 x 10^8) / (3.04 x 10^-19)

λ = 6.5388 x 10^-7 m = 6538.8 Angstrom

Thus, the longest wavelength is 6538.8 Angstrom.

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3 years ago

a circuit shown below is Wheastone Bridge used to determine the valve of unknown resistor X by comparison with three resistors M

stiv31 [10]

Answer:

X = 0.6

Explanation:

The resistance of the unknown resistor can be found by using the formula of the Wheatstone bridge:

$\frac{M}{N}=\frac{P}{X}\\\\\frac{850}{15} = \frac{33.48}{X}\\\\X = \frac{(33.48)(15)}{850}$

X = 0.6

Hence, the unknown value of resistance is found to be 0.6 units.

3 0

3 years ago

The volume of the ideal gas in the container is 9 m3. what would the volume be if four more blocks were placed on top of the lid

muminat

4.5 m3

when the temperature of an ideal gas remains constant, the product of the pressure and volume of the gas is constant. Therefore, the volume the gas is inversely related to its pressure.

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4 years ago

Joel uses a crew hammer to remove a nail from a wall . He applied a force 40 newtons on the hammer. The hammer applied a force o

zaharov [31]

By mechanical advantage 160/40=4

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4 years ago

What is congruence in science

aalyn [17]

Answer:

look it up on google

Explanation:

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4 years ago