5. Amotor designed to operate on 120 V draws a current of 25 A at startup. Once the motor attains normal operating speed, it draws 2.2 A. Find the back emf produced by the motor at normal operating speed.

Q: A satellite is in an elliptical orbit with a semi major axis of 8000km and an eccentricity of 0.15.…

A: Given, Semi major axis of elliptical orbit is, a = 8000 km eccentricity of orbit is, e=0.15…

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A:

Q: A baseball is dropped from the top of a 66 m tall building. Ignoring air resistance, how fast will…

A: Velocity of free fall motion V=√2gh  g = gravitational acceleration h =height

Q: Which of the following symptoms is likely to afflict an astronaut in space (a) swollen feet, (b)…

A: (a). In zero gravity the blood flow to the feet isn’t increased so the astronaut does not get…

Q: Question #2.

A:

Q: 10.7. Suppose an object is dropped from a height h (h « Rp, where Rg is the radius of Earth). Show…

A:

Q: A bird sitting in a tree is travelling at 30km/s relative to the faraway sun. When the bird drops to…

A:

Q: Suppose that I flip three coins: a penny, a nickel, and a dime. How many possible outcomes are…

A: a penny, a nickel, and a dime

Q: 39. A bullet is fired horizontally from a rifle at 200 m/s from a cliff above a plain below. The…

A:

Q: Find the mass of the block 0 <x< 4,0 < y< 8,0 < z< 1, whose density 8, is given by 8 = 2 – z for 0)…

A: The density is given by: ρ=2-z The mass of the block is calculated as:…

Q: At what height (in km) above the surface of Earth would the gravitational acceleration be 9.6 m/s2?

A:

Q: The conductor of a train moving at a constant speed sees a cow on the tracks. Why is it likely that…

A:

Q: Calculate the mass of the lower half of the centrally positioned sphere with radius 2, assuming that…

A: Mass = density x volume = d x dV  dM= ρ3 sin2ϕ dρ dϕ dθ θ will vary from 0 to 2π and ϕ will vary…

Q: You drop a ball from a height h, and it takes a time t to reach the ground. Then you drop the same…

A: Time taken to fall from h is t ,  Time taken to fall from 2h is T  To find = Which of the statements…

Q: Oscar, whose mass is 65.9kg, and Oliva, whose mass is 45.1kg, sit 2.6m apart in their physics…

A: Oscar's mass, m1=65.9 kg Oliva's mass, m2=45.1 kg The separation between them, r=2.6 m

Q: Consider a rocket moving in a uniform gravitational field, F = mg. Solve for the velocity of the…

A: To solve for the velocity of the rocket, we need to use Newton's second law, which states that the…

Q: How far could you throw a ball if you were standing in the back of a moving pickup truck?

A:

Q: (b) A particle moves from position A to position B in the following Cartesian coordinate system.…

A: We are given 2 points in space. We first find position vectors of these 2 points. We then find the…

Q: what is The gravitational constant?

A:

Q: How could Newton determine the functional form of the gravitational force without knowing the value…

A: Universal law of gravitation states that force acting between two objects is directly proportional…

Q: Derive Equations 1 and 2

A: Consider a diagram below. Here, VS is the source voltage, VMA and VAB­ are the potential drop…

Q: Convert 7.8 from g/m3 to SI units.

A: Given data as per question            unit=7.8g/m3

Q: "Hey Gary, you know we should fill airliners with Helium to reduce their weight, saving millions of…

A: (b) Then given differential equation is,

Q: This answer is incomplete. I need help with f and g.

A: Page 1

Q: Discuss the importance and applications of absolute and relative motion in plane axes.

A: Answer When we say that linear motion is relative and rotation is absolute is that if two observers…

Q: A major league pitcher claims that he can throw a baseball from the ground, straight up, as high as…

A: Given: The maximum height league pitcher claims is h=740 ft.

Q: Consider an electron entering a CRT area of deflation (2.3cm long) with a speed of 9.6 x 10^8 cm/s…

A: Solution: The length of the cathode ray tube is 2.3cm.  The horizontal initial speed of the electron…

Q: 2. Will each of the following pairs of objects attract or repel each other? Remember the saying.…

A: A)Repel , both charges have same sign. B)Attract, both charges have opposite sign. C)Repel , both…

Q: 'When you run along the circle of radius of R from A to B and then to back to A CCW, the distance…

A: Given  Radius of circle R

Q: Says 5.23 is incorrect for part b

A:

Q: A curious child stands on the top of a 794 m skyscraper and drops a coin from the top of the…

A:

Q: Which of the following primarily moves in a three dimensional reference frame?   Question 8…

A: Which of the following primarily moves in a three dimensional reference frame?

Q: A baseball player throws the ball to his teammate who is 90 ft away from him. If the ball is thrown…

A:

Q: skydiver of mass 70 kg above Earth (g = 10 m/s2) experiences a drag force modeled by -1.2 v (N).…

A:

Q: Calculate: V²[V•(F/r²)] and evaluate for r=1,25

A:

Q: Express the following equations in a) subscript notation using Einstein's convention and b) in…

A: Given equation is ∂(ρu)∂x+∂(ρv)∂y+∂(ρw)∂z= 0               ...(i)   now given to write in Einstein…

Q: A curious child stands on the top of a 764 m skyscraper and drops a coin from the top of the…

A: height from the coin dropped h =764 m initial velocity of coin = u =0 m/s let final velocity of coin…