Which body is in equilibrium?(1) a satellite orbiting Earth in a circular orbit
(2) a ball falling freely toward the surface of
Earth
(3) a car moving with a constant speed along a
straight, level road
(4) a projectile at the highest point in its trajectory
Answers
3) a car moving with a constant speed along a
straight, level road.
Hopefully this helps and good luck
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Whose touch turned all to gold, Aurum or Midas? a) Aurum b) Midas c) Both d) Neither
Answers
Wave speed = (frequency) x (wavelength)
= (0.3 Hz) x (5 m)
= 1.5 m-Hz = 1.5 m/s .
wire has a resistance of 1.3 ohms. The crosssectional
area of this wire is
(1) 7.9 × 10^−8 m2 (3) 4.6 × 10^0 m2
(2) 1.1 × 10^−7 m2 (4) 1.3 × 10^7 m2
Answers
The cross-sectional area of the copper wire is which has 1.3 ohm at 20 degree Celsius during laboratory experiment by student is 7.9×10⁻⁸ ohm.
What is the resistance?
Resistance is obstacle for the current flow in the circuit. It is the measure of reverse act to current flow in through a material. It can be given as,
Here, (ρ) is the specific resistance (l) is the length of the wire and (A) is the cross-sectional area of the wire.
During a laboratory experiment, the student finds that at 20° Celsius, a 6.0-meter length of copper wire has a resistance of 1.3 ohms.
The value of resistivity of copper wire is 1.72×10⁻⁸ ohm-m. Put these values in the above formula as,
Thus, the cross-sectional area of the copper wire is which has 1.3 ohm at 20 degree Celsius during laboratory experiment by student is 7.9×10⁻⁸ ohm.
Learn more about the resistance here;
ρ = resistivity of copper at 20 °C = 1.72 x 10⁻⁸ ohm-m
R = resistance of the copper wire = 1.3 ohm
L = length of the copper wire = 6 meter
A = area of cross-section of the copper wire = ?
Resistivity of copper wire is given as
R = ρL/A
inserting the values in the above equation
1.3 = (1.72 x 10⁻⁸) (6)/A
A = 7.9 x 10⁻⁸ m²
Hence the correct choice is
(1) 7.9 x 10⁻⁸ m²
Answers
the resultant force is equal to the sum of the individual forces.
That's a big part of the reason why, when you're pushing a car, you
ask somebody else to come push it with you, in the same direction.
and increases his speed to 10 m/s within 3 seconds. What was
Eric's acceleration?
0 3.2 m/s
O 3.2 m/s^2
0 -3.2 m/s^2
O 10 m/s^2
O Other:
Answers
Answer:
3.2 m/s^2
Explanation:
current velocity minus intitial velocity, divided by time: a=(v2-v1)/t
Answers
Answer:
Bullfrog
Explanation:
There is a species of frogs generally found in America known as Bullfrog. Bullfrog has horns. These types of frogs are very big and they can jump very high.
Thus, answer is Bullfrog.
Answers
Answer:
8138.16
Explanation:
hope this helps