4,347 Answered Questions for the topic Science

12/06/20

How deep (in m) is the snow?
A sonic depth gauge is placed 4.2 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.023 seconds after it was emitted. The air temperature is −20°C.How... more
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12/06/20

What is the frequency (in Hz) of the tone being emitted?
A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 7.15 m from one of... more
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Science Biology Chemistry

12/06/20

What are the charges, mass and location of each particle?

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Science Biology Chemistry

12/06/20

What are the charges, mass and location of each particle?

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Science Astronomy

12/06/20

Science about asteroids
Answer the following.1.Asteroids orbit the_____ _____ between Mars and Jupiter.2.explain what happens to a meteoroid in order for it to become a meteorite3.describe these parts of a comet: head,... more
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12/05/20

Find the air temperature (in K).
In a student laboratory exercise, the wavelength of a 52,300 Hz ultrasound wave is measured to be 0.660 cm. Find the air temperature (in K).
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Science Chemistry

12/05/20

A 20 mL of CO gas burn in 40 mL of O2, gas in a closed vessel according to the equation : 2CO+O2---->2CO2
A 20 mL of CO gas burn in 40 mL of O2, gas in a closed vessel according tothe equation : 2CO+O2---->2CO2What is the total volume of the gases (at STP) in the vessel after the end ofthe reaction... more
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Science Physics

12/05/20

If a person lifts a three times heavier object and travels twice the distance by factor, does the work by the person change? Why?

If a person lifts a three times heavier object and travels twice the distance by factor, does the work by the person change? Why? please help! Thank you!
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12/04/20

what is they of the cause/problem of Climate change 5 sentence

The cause: what is Climate change? That you care With a 5 sentence explanation of the cause/problem.
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12/04/20

N2 + 3H2 → 2NH3 How many grams of ammonia (NH3) is produced when 12grams of hydrogen react?

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12/04/20

How often must an adult Peregrine kill to support its young?
How often must an adult Peregrine kill to support its young?
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12/03/20

Approximately how many times louder is a 145-dB sound than a 85-dB sound?
Approximately how many times louder is a 145-dB sound than a 85-dB sound?
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12/03/20

How much time elapses between the instant the fan sees a batter hit the ball and the moment the fan hears the sound?
A baseball fan sitting in the "cheap seats" is d = 122 m from home plate (see the figure below). How much time elapses between the instant the fan sees a batter hit the ball and the moment the fan... more
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12/03/20

How far (in m) is the surface of the snow from the device?
A sonic depth gauge is placed 4.2 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.023 seconds after it was emitted. The air temperature is −20°C.(a)... more
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12/03/20

What is the frequency (in Hz) of the tone being emitted? (Assume air temperature to be 20°C.)
A person stands directly in front of two speakers that are emitting the same pure tone. The person then moves to one side until no sound is heard. At that point, the person is 7.15 m from one of... more
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Expert Answers •1

12/03/20

What is the air temperature (in K)?
In a student laboratory exercise, the wavelength of a 52,300 Hz ultrasound wave is measured to be 0.660 cm. Find the air temperature (in K).
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12/03/20

Calculate the wavelength of the resulting wave on the cable.
A steel cable with total length 68 m and mass 150 kg is connected to two poles. The tension in the cable is 2,039 N, and the wind makes the cable vibrate with a frequency of 2 Hz. Calculate the... more
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Science Physics

12/03/20

What is the frequency of the wave (in Hz)?
A wave traveling 91 m/s has a wavelength of 5.6 m. What is the frequency of the wave (in Hz)?
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12/03/20

what is the speed of waves on the Slinky (in m/s)?
A 5.2 Hz continuous wave travels on a Slinky. If the wavelength is 0.61 m, what is the speed of waves on the Slinky (in m/s)?
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12/03/20

Size of the Moon Question
Let’s say you were to do an experiment using a coin that helps to find the distance from earth to moon through measuring the distance between your eye and the moon with the coin. This will later... more
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Science English

12/03/20

what caused Climate Change
 The cause/problem.
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Science Physics

12/03/20

The physical phenomenon responsible for the heating of the resistors at the passing of the electric current is called?
When passed by an electric current, the resistors suffer great temperature raise, being that way utilized in electrical ovens, grills and in hair dryers.a) Meissner effectb) Joule effectc) Doppler... more
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Science Physics

12/03/20

Analyze the following statements about a circuit containing three resistors with different resistances, associated in parallel and submitted to a different potential.
Verify if the statements are true or false.1 - The resistance of the equivalent resistor is smaller than the smallest of resistances of these resistors.2 - A electrical current is smaller in the... more
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Science Physics

12/03/20

Three equal resistors of 30 OHM resistance are together in parallel with a 12 V battery attached. The equivalent resistance of this circuit is?
A) 10 OHM, with the current being 1.2 AB) 20 OHM, with the current being 0.6 AC) 30 OHM, with the current being 0.4 AD) 40 OHM, with the current being 0.3 AE) 60 OHM, with the current being 0.2 A
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Science Physics

12/03/20

Given that the effective resistance is 2 OHM, how much is worth the resistance of each one of these OHMS resistors.
Three equal Resistors are put up in a way in where two are related between themselves and at the same time in parallel with the third resistor. Given that the effective resistance is 2 OHM, how... more
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