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ira [324]
3 years ago
9

TEST HELP PLEASE!! WILL GIVE MEDAL TO BEST ANSWER!!

Physics
2 answers:
Veronika [31]3 years ago
7 0
C. Hot air balloons use convection to rise.
Law Incorporation [45]3 years ago
7 0
<span>hot air balloons rise due to convection. Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. the transfer of heat from flame to air is the convection process.</span>
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A proton moving eastward with a velocity of 5. 0 × 103 m/s enters a magnetic field of 0. 20 t pointing northward. what is the ma
Serggg [28]

The magnitude of the force is 1.6*10^-16 N. The direction of force is upward.

The definition of force is the push or pull that causes a massed object to change its velocity. Force is an external agent that has the power to alter a body's resting or moving position. It has a direction and a magnitude. The total amount of forces exerted on an object is referred to as the magnitude of force.

The strength of the force increases when all the force is pulling in the same direction. When force is exerted on an item from different angles, the force's strength reduces. The amount that encapsulates the force's strength is known as its magnitude.

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6 0
2 years ago
Um ladrão tenta fugir sozinho carregando em suas mãos uma mala cheia de barras de ouro. A densidade do ouro é igual a 20 g/cm³,
Roman55 [17]
I believe the answer to your question is A
4 0
4 years ago
In a series circuit, when batteries are added to the circuit the voltage will _____ and the current will _____.
Eva8 [605]

Answer: voltage, explode is the answers

Explanation:

Bc of the device for each  server

5 0
3 years ago
A piece of wood 400N in weight and 50cm X 30cm X 20cm in size lies on 50cm X 20cm face. Calculate the pressure exerted by it.
Serga [27]

Answer:

P = 4000 [Pa]

Explanation:

Pressure is defined as the relationship between Force and the area where the body rests.

The support area is equal to:

A=50*20=1000[cm^{2} ]

But we must convert from square centimeters to square meters.

1000[cm^{2}]*\frac{1^{2}m^{2}  }{100^{2}m^{2}  }=0.1[m^{2} ]

And the pressure is:

P=\frac{F}{A} \\P=400/0.1\\P=4000[N/m^{2} ]or 4000[Pa]

6 0
3 years ago
Help asap pls. Which of the following best describes how high and low pitch are different?
Gwar [14]
Answer D. The pitch is in the frequency.
3 0
2 years ago
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