To say whether an atom is an isotope of an element, the number of protons and electrons must be checked and compared with respect to the original element.

Q: A centrifuge slows down from 961rpm to 313rpm in 1616 seconds. Assuming constant angular…

A:

Q: A rock is projected from the edge of the top of a building with an initial velocity of 12.2 m/s at…

A:

Q: A bus decreases its speed from 20.01 m/s to 14.22 mls in 4 seconds. Find the acceleration of the bus

A: Introduction :     In this question we are provided it value of initial speed of the  bus , final…

Q: he belayer is lowering a climber so that they move downwards with a constant speed (no…

A:

Q: When the anchor angle equals to 120, the tension in each arm of the anchor is:   Question 10…

A: Equilibrium of forces

Q: To Merge into the highway you need to increase your speed from 50 km/h to 100 km/h. If your car can…

A: Given:-  The initial velocity  v1 = 50 km /h = 13.89 m/s  The final velocity v2 = 100 km/h = 27.78…

Q: A 1300 kg car moving on a horizontal surface has speed v= 77 mile/h when it strikes a horizontal…

A:

Q: What is the value of the expression 1/2 (3x - 5) +5 when x= -3? A. 2 OB. 4.5 O C. -2 D. 7

A:

Q: You can hear the sound from a person talking on your right in both ears because (A) sound diffracts…

A:

Q: The attack angle for javelin throwing is Question 12 options: angle between direction of…

A:

Q: A machine raises a load of 430 N through a height of 10 m in 5 sec. Calculate: 1. Energy spent by…

A: Force, F = 430 N Height, s = 10 m Time, t = 5 sec Energy, E = ?  Power, P = ?

Q: You start out by driving 118 miles south in 3 hours and 21 minutes, and then you stop and park for a…

A: Given First distance moved = 118 miles south Time taken for this = 3 hours and 21 minutes, then you…

Q: An unstretched spring is 10 ft long. A pull of 40 lb stretches the spring by 1/2 ft. Find the work…

A:

Q: -Force of gravity acting on the girl.

A: Given data;  A girl having mass,m= 35 kgShe reaches the roof at a height,h=6 m time,t= 3 secg=10…

Q: 24. A mass-spring system is set up so that the mass oscillates in the horizontal. The mass is…

A:

Q: A bar magnet is placed a distance L = 22.6 cm to the right of a compass that originally points…

A:

Q: Starting in Albany, you travel a distance 367 miles in a direction 10.5 degrees north of west. Then,…

A: Given:- Starting in Albany, you travel a distance of 367 miles in a direction 10.5 degrees north of…

Q: Find the kinetic energy of a ball of 110 kg mass, moving at a velocity of 2 m/s.

A: Introduction :   In this question we are provided it value of mass and velocity . With these data we…

Q: cone is resting on a tabletop as shown in the figure with its face horizontal. A uniform electric…

A:

Q: The displacement (in meters) of a particle moving in a straight line is given by the equation of…

A: Velocity and displacement.

Q: Spiderman uses his spider webs to save a runaway train moving about 60 km/h. His web streches a few…

A: Write the given values with the suitable variables. u=60 km/h=60×10003600 m/sx=500 mm=104 kgv=0 m/s…

Q: tion between the block and the plane is μk = 0.13. In the initial position, where the spring is…

A:

Q: A pump is used to lift 500kg of water from a depth of 80m in 10s. Calculate: (a) The work done by…

A:

Q: Polygon Method: Determine the magnitude and direction of the resultant for the given vectors. Use…

A: Solution: Let the scale of the drawing be 1kph=10units. Apply polygon method: Start from origin O…

Q: When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is…

A: Given data:  Power (P) = 60 W Voltage (V) = 120 V Required: Current (I)

Q: A ray of light in air is incident at an angle of 25.0° on a glass slide with index of refraction…

A: Given: The incident angle of the light inside the air is 25o. The refractive index of the glass is…

Q: Which of the following is not a vector quantity? a. angular velocity b. momentum c.radians d.…

A: Introduction: The vector quantity is that type of physical quantity which have both magnitudes as…

Q: First question: To achieve efficient exciton to photon conversion and lower operating voltages, what…

A: Given that- To achive efficient extiation to photon conservation lower opearating voltages   To…

Q: SPH4UIDynamics 2. A car rounds a very icy (i.e. frictionless) curve on the highway that is banked at…

A: Given:-  A car rounds a very icy (i.c. frictionless) curve on the highway that is banked at an angle…

Q: 1 Two objects are are moving towards each other with velocities V₁ and ₂ on a frictionless surface.…

A: In elastic collision

Q: A diverging lens has a focal length of x. An object, represented by the arrow, is placed at point A…

A: To determine the position of image as shown in figure.

Q: Find the spring constant k for a spring if a force of 19 N stretches the spring 0.46_m.

A: Given data:  Force (F) = 19 N Stretch in Spring (x) = 0.46 m Required: The spring constant (k)

Q: A mass-spring system is set up so that the mass oscillates in the horizontal. The mass is0.85ˍkg,and…

A:

Q: A person exerts a horizontal force of 35 N on the end of a door 59 cm wide. What is the magnitude of…

A:

Q: Calculate the wavelength at 32m/s of a frequency of a traveling of 6 Hz.

A:

Q: A 0.024 g plastic bead hangs from a lightweight thread. Another bead is fixed in position beneath…

A:

Q: A vertical solid disk of uniform mass M = 7 kg and radius R = 0.5 m is pivoted from point O as shown…

A:

Q: Consider the so-called "2-second rule" that is used as a recommendation when teaching safe driving…

A: Option (c) is correct choice. The amount of time to safely pass a vehicle that stops suddenly in…

Q: in a playground a 53.8 kg friend site 1.17 m to the left of the pivot of a see saw. calculate the…

A: Write the given values with the suitable variables. m1=53.8 kgd1=1.17 mm2=31.65 kg Here, m1, d1, and…

Q: A wave front passing through a thin plastic film as shown here has its intensity reduced because…

A: As per the given experiment, the wavefront is LINEARLY POLARIZED.

Q: Two blocks on a frictionless horizontal surface are pulled to the right by a tension force of 50 N…

A: The free-body diagram of block A is shown below. Here, T is the tension in string 2 and a is the…

Q: 2. A traffic light weighing 100 N hangs from a vertical cable tied to two other cables that are…

A: Given, Weight of the traffic light, W = 100 N

Q: A parallel-plate air capacitor with a capacitance of 260 pF has a charge of magnitude 0.153 μC on…

A: in this question  we use simple equation  of capacitance.

Q: two boats leave the harbour at the time in directions that are 20 degrees apart. if one is…

A: Two boats leave the harbor at the time in directions that are 20 degrees apart. The first boat is…

Q: 1. A red-hot horseshoe is placed on an anvil at room temperature. Which way does the heat flow?…

A: Heat Flow: When two systems are at a different temperature, then the transfer of heat or heat flow…

Q: . Power spent by the man.

A: Given data; A man spends; Energy=2.4 kJ Dispacing a body by,h= 48 m Time,t= 1.5 secCalculate the…

Q: Spiderman uses his spider webs to save a runaway train moving about 60 km/h. His web stretches a few…

A: Initial velocity, u = 60 km/hr =60×5/18 =  16.667 m/s Final velocity, v = 0 Mass, m = 104 kg = 10000…

Q: 6. A 3160 kg elevator is supported by a steel cable. If the tension in the cable is 58600_N, then…

A:

Q: n reference to the figure, A 0.125 m B Vo = 10 m/s hannnnn 30° Determine the velocity in m/s of…

A:

Q: Look at a circuit made up of a resistor, a battery, a capacitor, and a switch. Take the time…

A: Given : τ = 3.12 seconds I = 420 mA = 0.420 A V = 12 V

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: