All categories

4 years ago

4 questions!! please Help!! 40 points!!

Physics

2 answers:

Lena [83]4 years ago

6 0

Explanation:

36. B. digital signal

Electronic signals that pulse current in a series of ones and zeros are known as Digital Signals. A digital signal refers to an electrical signal that is converted into a pattern of bits.

37. C. near both poles

The Magnet field would be strongest on both sides, the North and the south pole. It is equally strong at the north pole when compared with the south pole.

38. C. Voltage

A transformer is designed to convert alternating current from one voltage to another. It can be designed to "step up" or "step down" voltages

39. A. Earth travels around the sun

Earth travels around the sun, the gravity of the Sun keeps Earth and the other planets in their orbits. Just as the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of the pull of the Sun's gravity.

Hope this helps :)

If it did please mark brainliest :D

- A. Hazle <3

Reptile [31]4 years ago

4 0

Answer: digital signals, near both poles, voltage, and the planets travel around Earth.

You might be interested in

maxonik [38]

Answer: The similarity in between the the diet plan of the 16 year old boy and 52 years old women is that they both should focus on their bone health.

Both of them should have a proper intake of calcium in their body so as to have healthy bones.

The differences is that the digestive system of both is different, the 16 old boy can have rich diet and can digest it.

But the 52 year old women cannot have such diet which contains fat, cholesterol and hard to digest diet.

The similarity in exercises is that they should have proper movement in their body so as to maintain the flexibility.

Based on the body's capacity to do exercise there will be different exercises assigned to both a 16 year old boy and 52 year old women.

Explanation:

8 0

3 years ago

Two moles of an ideal gas are compressed in a cylinder at a constant temperature of 80.0 ∘c until the original pressure has trip

elena55 [62]

The work done by a gas during an isothermal process is given by:
$W=nRT ln \frac{V_f}{V_i}$ (1)
where
n is the number of moles of the gas
R is the gas constant
T is the absolute temperature of the gas
$\frac{V_f}{V_i}$ is the ratio between the final volume and the initial volume of the gas

We need to calculate this ratio, and we can do it by using the gas pressure. In fact, for an isothermal process, Boyle's law states that the product between pressure and volume of the gas is constant:
$pV=k$
which can be rewritten as
$p_i V_i= p_f V_f$
which is equivalent to
$\frac{V_f}{V_i}= \frac{p_i}{p_f}$
The problem says that the pressure of the gas is tripled, therefore the ratio between final and initial volume is:
$\frac{V_f}{V_i} = \frac{p_i}{3 p_i} = \frac{1}{3}$

Now we can use eq.(1) to calculate the work done by the gas. The absolute temperature is
$T=80.0^{\circ}C+273 = 353 K$
The number of moles is n=2, therefore the work done is
$W=nRT ln \frac{V_f}{V_i}=(2 mol)(8.31 J/mol K) (353 K) \ln \frac{1}{3}= -6445 J$
And the work is negative, because it is done by the environment on the gas (the gas is compressed)

6 0

3 years ago

Q7 Describe two types of atomic change that produce electromagnetic<br> waves.

Crank

When a neutron or a proton in the nucleus changes a gamma ray is produced (gamma rays are electromagnetic waves)

When an electron drops from a higher energy level to a lower energy level an electromagnetic wave is give off.

7 0

3 years ago

The square loop shown in the figure moves into a 0.80 T magnetic field at a constant speed of 10 m/s. The loop has a resistance

mr Goodwill [35]

Is there more information that goes with the question

8 0

4 years ago

A brass sphere with a diameter of 16. 0 cm at 68°F is heated up to a temperature of 284°F. The change in volume of the sphere is

Elodia [21]

If a brass sphere with a diameter of 16. 0 cm at 68°F is heated up to a temperature of 284°F. The change in volume of the sphere is 14.67 $cm^{3}$ .