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Zolol [24]
3 years ago
6

The standard metric unit of density for a solid is

Physics
1 answer:
prisoha [69]3 years ago
5 0
There is no SI "base unit" of density.
(Any unit of mass) divided by (any unit of volume) is
a valid unit of density.

The units of density that are seen most often are

(gram per cm³) and (kgm per meter³) .
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Fuel cells have been developed that can generate a large amount of energy. For example, a hydrogen fuel cell works by combining
maksim [4K]
Electric power is given by:
Power = voltage x current
10000 = 15.8V
V = 633 Volts
7 0
4 years ago
A stationary 500 kg tank fires a 20 kg miegile at 100 m/s. What is the velocity of the tank after the missile is fired? Assume t
dedylja [7]

Answer:

v₁ = 4 [m/s].

Explanation:

This problem can be solved by using the principle of conservation of linear momentum. Where momentum is preserved before and after the missile is fired.

P=m*v

where:

P = linear momentum [kg*m/s]

m = mass [kg]

v = velocity [m/s]

(m_{1}*v_{1})=(m_{2}*v_{2})

where:

m₁ = mass of the tank = 500 [kg]

v₁ = velocity of the tank after firing the missile [m/s]

m₂ = mass of the missile = 20 [kg]

v₂ = velocity of the missile after firing = 100 [m/s]

(500*v_{1})=(20*100)\\v_{1}=2000/500\\v_{1}=4[m/s]

8 0
3 years ago
Which order shows increasing energy of photons?
Alchen [17]

The correct answer is C. microwaves, infrared, visible, gamma rays

Electromagnetic waves arranged in order of  frequencies and wavelengths form the electromagnetic spectrum. In the order of decreasing frequency we obtain the following sequence.

Gamma ray>x-ray>ultraviolet >visible light>infrared light>microwaves>radio waves.

According to the Einsteins equation, E=hf, Energy is  directly proportional to frequency. the higher the frequency the higher the energy of the photon and vice-versa.

4 0
4 years ago
Read 2 more answers
How many significant digits are in 0.3500
const2013 [10]
4 significant figures (the 0’s are considered significant because they follow a non-zero number)
7 0
4 years ago
On Monday while Johnny was getting ready for school, he was in the bathroom holding his comb when he got an itch on his head. Jo
zavuch27 [327]

Answer:

it is to do with the static electricity produced by using the comb

3 0
3 years ago
Read 2 more answers
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