7)A vector B is given by its component ?? = 2.5 and ?? = 7.5 . what the angle does vector B makes with the positive x-axis  a) 25 b) 18 c) 55 d) 72   8) For any two vectors A and B, if A.B =0 then the angle between them is a) Zero b) 30 degree c) 90 degree d) 180 degree     9)A point in the xy plane has cartesian coordinates (-3.00, 5.00) m. What are the polar coordinates of this point?   10)Which of the following is vector quantity? a)Displacement b) Speed c) Density

Q: A boat floating in fresh water displaces water weighing 50 kN. i) What is the weight of the water…

A: Given               weight of fresh water displace =50 KN             Density of fresh water = 1095…

Q: Which of the following events in the early universe likely came first?   a. Formation of the…

A: Answer: (b) Big Bang Nucleosynthesis

Q: PRACTICE IT Use the worked example above to help you solve this problem. A train at a speed of 36.4…

A: Given  T=21.7oC=21.7+273=294.7 k (air temperature) Now velocity of sound can be determined using the…

Q: An 8-kg block slides 150mm from rest down the 25-degree plane. The spring has a value of k =…

A:

Q: An 8-kg block slides 150mm from rest down the 25-degree plane. The spring has a value of k =…

A:

Q: A block with a mass of 49.6kg is dropped from a certain height. An undeformed spring with a spring…

A:

Q: What do you do when you are driving and see that a police officer has another car pulled to the side…

A: When I am driving and see that a police officer has another car pulled to the side of the road, I…

Q: The product of the two provided equations (with Z = 1) is the ground state wave function for…

A: In the given question, The radial and angular wave function for hydrogen is given. The product of…

Q: (a) A Carnot engine takes 4000J of heat from a reservoir at 750K, does some work, and discards some…

A: Given value--- A Carnot engine takes 4000J of heat from a reservoir at 750K, does some work, and…

Q: 46. A cord of fixed length and uniform density, when held between two fixed points under tension 7,…

A:

Q: James Joule tested the conversion of mechanical energy into internal energy by measuring…

A:

Q: The diagram shows a rectangular conducting coil with 8 turns that is in a magnetic field with a…

A:

Q: Determine the y component of the unit vector (magnitude of P=1) shown below. Write the numerical…

A: The unit vector P makes an angle of (90°-30°)=60° with y axis.

Q: The filament assembly in an X ray machine is also called the

A: The filament assembly in an X ray machine is also called theCathodeit is the source of electrons in…

Q: The figure below shows a top view of a bar that can slide on two frictionless rails. The resistor is…

A:

Q: Which of the following gives the nearest value for the deceleration (negative acceleration) in m/s2…

A:

Q: One mole of hydrogen has a mass of 2 g. Calculate the mean speed of the hydrogen molecules at T =…

A: Given, mass m = 2 g = 0.002 kg Temperature  T = 300 K

Q: Seismic waves are described by s-waves and p-waves. Which of these about seismic waves is not true?…

A: 1st questionP waves or primary waves arrives first and S waves or secondary waves arrive second, so…

Q: QUESTION 4 Which of the following gives the nearest value for the time it takes for the block to…

A:

Q: 1. What are the magnitude and direction of the angular momentum relative to the origin of the 200 g…

A:

Q: Two opposite and equal charges 4 × 10-8 C when placed 2 x 10 cm away, form a dipole. If this dipole…

A:

Q: The history of the universe described by the Big Bang theory is separated into different eras.…

A: When the universe was about 1 millisecond old, nuclei were very hot enough and dense to fuse…

Q: The value of the induced current is:

A:

Q: Consider the PV diagram of system of a 1.4-mole H₂ gas (Cv = 5R/2, Cp = 7R/2). Pressure [Pa] 115000…

A:

Q: Which of the following is NOT a reason for the very earliest ancient development of Astronomy…

A: The study of astronomy includes everything in the universe besides our planet's atmosphere. That…

Q: A bicycle moves with a constant deceleration of -2 ?/?^2. If the initial velocity of the bike is 4.0…

A: Given value--- deceleration = - 2 m/s2.  initial velocity = 4 m/s. time = 3 sec. We have to…

Q: A silver block has a mass of 1 kg and specific heat capacity of silver is 0.240 J/g°C. What is the…

A: Given data:  Mass (m) = 1 kg = 1000 g Specific heat capacity (c) = 0.240 J/g.°C Heat energy released…

Q: What will be the generated equation by applying Kirchhoff's Rule on loop abcda? а R₂ b E ₁ R₁ ww RA…

A: Given data-  The circuit is given, we find out the generated by applying kirchhoff's rule on loop…

Q: For item 19: CHOICES FOR NUMBER 19 C 0.00074 0.00075 0.00073 C 0.00072 0.00076

A:

Q: Why did so many people believe the world is flat when it is obviously a sphere?

A:

Q: A sphere, centred on the origin, has radius 31.7 cm, and is spinning at 3 revolutions per second…

A:

Q: The n = 3 to the n = 2 transition for an electron in a Hydrogen atom is in the visible band. (a)…

A: Given value--- transition from n= 3 to n = 2 . We have to find---  (a) What is the energy of this…

Q: For the parts of the below question, fill in the empty boxes with your answer (YOUR ANSWER MUST BE…

A:

Q: 60.0 μ ε 50.0 cm * 40.0 cm +5.00 με a) Determine the electric field at point C due to charges A and…

A:

Q: A rectangular block of material has a refractive index 1.28. A light ray incident from air at the…

A: We are given a ray entering a rectangular block. We are given refractive index of rectangular block.…

Q: Determine the force in Newtons required to produce an acceleration of 0.30 m/s2 on a 0.05 kg mass.

A: Given,The acceleration of the object, a = 0.30 m/s2The mass of the object, m = 0.05 kgAs per…

Q: 5. A solid sphere of radius R rolls without slipping in a cylindrical pipe of radius 5R as shown in…

A:

Q: A 500 kg dragster reaches a speed of 90 m/s on level ground, starting from rest. Its efficiency is…

A: mass = 500 kg initial velocity = 0 m/s final speed = 90 m/s efficiency = 8.20 % energy produced by…

Q: The acceleration due to gravity on planet Uranus is 8.82m/s². A ball is dropped from Uranus from a…

A: Giveng=8.82 m/s2h=6.2 mas ball is dropped so initail velocity of ball, u=0

Q: One of Kepler's Laws states that:   a. A force is equal to an object's mass times its…

A: Kepler's laws of planetary motion are rules that describe how the planets move within the solar…

Q: velocity of sound in The a certain medium is 1000 m/s.  If sound wave has a frequency of 500 hz, the…

A: Given value--- velocity = 1000 m/s. frequency = 500 Hz. We have to find--- wavelength?

Q: Given the following: Length of rod = 10 inches Angle alpha = 30 degrees Determine the magnitude of…

A: Solution:-

Q: 47. Two point sources in a ripple tank radiate waves in phase with a constant wavelength of 0.02…

A: given value wavelength = 0.02 m. angle = 6 degree. order m = 1  We have to find--- separation ?

Q: A pool ball leaves a 0.60-meter high table with an initial horizontal velocity of 2.4 m/s. Predict…

A:

Q: 1. If a 13.00kg dog starts from rest and slides down the water slide, which has a height of…

A: 1) Given m=13 Kg (mass of dog) h1=8 m  From conservation of energy Now potential energy of dog at…

Q: Which of the following best represents Newton's Third Law of Motion?         b. F = ma.   c.…

A: Introduction:- Newton's Third Law of Motion:-  We know that the third law of motion is defined as…

Q: Two stationary blocks of mass m and M are connected by a massless, frictionless pulley as shown. The…

A:

Q: 3) An airplane is flying at a constant altitude of 22000 meters. When first seen to the east of an…

A:

Q: PLease help me to answer this po/ TYSM

A:

Q: Which of the following lists of people contains three people who each supported a heliocentric model…

A: Answer: (a) Copernicus, Kepler, Galileo