A closed conducting loop through which an electrical current can flow is which of the following?a. resistance
b. circuit
c. voltage
d. electrical pressure
Answers
Think of it like this: A loop is a CIRCle, and thus is a CIRCuit.
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"Consider the following atoms: A. Gold, B. Copper, C. Carbon, D.Silver. Consult the periodic table and rank these atoms, from most to least, by their a mass. b. number of electrons. c. number of proto"
If you hit another object with your vehicle, your _______ will be slowed or stopped by the force of impact caused by that object upon impact.
What is a major goal of the federal government when managing land resources?
Dua buah vektor, yaitu P= 6i-5j+2k dan Q = 2i+2j+8k. Tentukan vektor R agar P-Q+R=0. Hitung pula besar vektor R?
Answers
The angular velocity of the earth is
The satellite tangential velocity is the distance from the earth times the angular velocity, which is
For meters per second, we divide by the number of seconds in an hour, which is 3600:
Final answer:
The tangential velocity of a satellite, with the same angular velocity as the Earth and 5x10^7 m distance from Earth's center, is calculated to be approximately 3650 m/s.
Explanation:
The tangential velocity of a satellite is given by the formula v = rω, where 'v' is the tangential velocity, 'r' is the radius (distance from the center of the Earth to the satellite), and 'ω' is the angular velocity. The referenced satellite's angular velocity is the same as that of the Earth, which is approximately 7.292 x 10^-5 rad/s. Given r = 5x10^7 m (the satellite's distance from Earth), we input these values into the formula:
v = (5x10^7 m)(7.292 x 10^-5 rad/s)
Upon calculation, we find that the satellite's tangential velocity is approximately 3650 m/s.
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Answers
Answer:
1750mile
Explanation:
500/h
3.5h=3.5×500=1750
give the answer in watts to three significant figures
Answers
Work done = mgh
Mass, m = 33kg ( Am presuming it is 33 kg).
h = 85 m.
Work done = 33 * 9.81* 85 = 27517.05 J.
Time taken.
Since object was dropped from height, it fell under gravity.
Using H = ut + (1/2) * gt^2. u = 0.
H = 1/2 gt^2.
t = (2H/g) ^ (1/2)
t = (2*85/9.81) ^ 0.5 = 4.1628 s.
Power = 27517.05 / 4.1628 = 6610.23 Watts.
= 6610 W to 3 S. f.
Answers
b. Is the speed of Block A (greater/less than/equal to) the speed of Block B? Explain your reasoning.
c. Is the momentum of Block A (greater/less than/equal to) the momentum of Block B? Explain your reasoning.
Answers
Answer:
a. the work done by the gravitational force on Block A is less than the work done by the gravitational force on Block B.
b. the speed of Block A is equal to the speed of Block B.
c. the momentum of Block A is less than the momentum of Block B.
Explanation:
a. The work done by the gravitational force is equal to:
w = m*g*h
where m is mass, g is the standard gravitational acceleration and h is height. Given that both blocks are released from rest at the same height, then, the bigger the mass, the bigger the work done.
b. With ramps frictionless, the final speed of the blocs is:
v = √(2*g*h)
which is independent of the mass of the blocks.
c. The momentum is calculated as follows:
momentum = m*v
Given that both bocks has the same speed, then, the bigger the mass, the bigger the momentum.
Final answer:
The work done by gravitational force on blocks A and B is equal as the work is independent of the path. Both blocks have the same speed when they reach the final height due to the conversion of potential energy into kinetic energy. However, the momentum of Block B is greater due to its larger mass.
Explanation:
This question is about the principles of work, energy and momentum in physics. Let's address each part of it:
- Work done by gravitational force: The work done by the gravitational force on both blocks A and B is equal. This is because work done by gravity depends only on the change in height, which is the same for both blocks, and the weight of the block. So, even though Block B is heavier as it weighs more than Block A, the work done is the same because the force of gravity has to move the blocks the same vertical distance.
- Speed of the blocks: The speed of both blocks A and B will be equal when they reach the final height. This is because, in the absence of friction and air resistance, the blocks will convert all of their gravitational potential energy at the start into kinetic energy at the end, irrespective of their weights or the steepness of the ramps.
- Momentum of the blocks: The momentum of Block B is greater than Block A. This is because momentum depends on both the mass and the velocity of an object. Even though both blocks have the same speed at the bottom, Block B is heavier, therefore, it will have more momentum.
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Answers
When a wave transfers from one medium to another with different properties, the speed of the wave can change. In this case, we know that the wavelength changes when the wave transfers from the first type of rope to the second type of rope. If the wavelength becomes one-fourth of what it was before the transfer, this means that the second type of rope has a higher wave speed than the first type of rope.
The wave speed is defined as the product of the wavelength and the frequency of the wave. Since the frequency of the wave remains constant as it transfers from one medium to another, a decrease in wavelength means an increase in wave speed. This can be seen from the wave equation, c = λf, where c is the wave speed, λ is the wavelength, and f is the frequency.
Therefore, if the wavelength becomes one-fourth of what it was before the transfer, this means that the wave speed in the second type of rope is four times the wave speed in the first type of rope. In other words, the speed of the wave becomes quadruple its original speed after the transfer.
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