A uniform ladder 8.30m long and weighing 235.8N rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 72° angle with the ground. How far up the ladder can a 914.6N person climb before the ladder begins to slip?

Q: Does a car burn more gasoline when its lights are turned on? Does the overall consumption of…

A: Yes, a car burns more gasoline when its light turned on.

Q: How much work must be done on the particle by the external agent? (in J)

A:

Q: A form of energy that permits human eye to see.

A: The only one form of energy exists which permits human eye to see is light energy.

Q: The unit kilowatt-hour is a measure of(a) the rate at which energy is transformed.(b) power.(c) an…

A: kilowatt hour

Q: What must be the power output of the pump?

A: The mass of the water is The depth of the well is The ejection speed of the water is Power Where,…

Q: Example of energy density in daily lives

A: Density is used in our everyday lives all the time for example we used  density for balloons since…

Q: Give examples of the role of motors in our daily life.

A: Electric motors are extremely important in modern-day life. They are used in vacuum cleaners,…

Q: Estimate the rate at which energy flows from a gasoline pump to a motor vehicle during  a “ fill-up.…

A: Given: The HHV of 1 gallon of gasoline is 145,000 Btu It takes 5 minutes to fill up a 16-gallon…

Q: Assume a laptop uses 50 watts per hour if the laptop is used for 8 hours a day how many kilowats or…

A: A regular laptop uses about 50 watts of power per hour. When used for 8 hours a day, the total power…

Q: What does it mean for something to have energy?

A: In the given question, we have to discuss about the term energy.

Q: A wire 5 m long and 0.4 mm in diameter is stretched by a load 2 kg. If the extension in wire is 3…

A: Energy per unit volume =?Given:Length of wire (L)=5 mDiameter of wire (d)=0.4 mmd=0.4×10-3 mRadius…

Q: work and energy. What is conservation of mechnical

A:

Q: Jenny is out trimming her hedges with a hedgetrimmer that has a 1500W power rating. If it takes her…

A: Let the power rating is denoted by P and the working time is given by t. Evaluate the energy (E)…

Q: (a) Calculate the power per square meter reaching Earth’s upper atmosphere from the Sun. (Take the…

A:

Q: Calculate the electric force on a charge, q near two charges, +Q and -Q, as shown in (a) and (b).…

A:

Q: If speed of wind is increased by 3 times, Power of wind

A: Given: Speed of wind increases by 3 times.   The power of the wind.

Q: What sort of energy does flying bird posses?

A: Kinetic energy and potential energy

Q: Cadrudate the that datves af 24 m/s end. hoe 50000J et energy.

A:

Q: How INuch does it cost to operate a 25-W soldering iron for 8.0 hours, if energy costs Bz 200/kWh?…

A: Given data:  Power (P) = 25 W = 0.025 kW Time (t) = 8.0 hours Energy cost = Bz 200/kWh Required: The…

Q: 13. Which is not a unit of energy? O Newton O Joules O Ergs O kilowatt - hr

A: Newton is unit of force Joules  is unit of energy  SI unit Erg is unit of energy in cgs unit…

Q: what is physical form of energy.

A: Energy is a quantity that is transferred from system to system. There are different form of energy,…

Q: why is the initiale phase -pi/3

A:

Q: Show that 1kW-hr is the same as 3.6MJ

A: Concept: kW-hr is unit of energy. It is defined as amount of energy consumed from a power source ,…

Q: maximum power consumption at load resi stor R,

A:

Q: Pablo wants to set up a solar heater for an indoor pool. If each panel produces 100 W of power, th

A: Given: Power produces by the pool is P=100W. Temperature T1=85F=302.6K Temperature T2=60F=288.7K…

Q: Chichay uses the washing machine which consumes energy at 300 Watts at normal washing speed. How…

A: Given(s): Power of the machine, P=300 W=0.30 kW It runs for, t=80 min=8060h=43 h Cost of…

Q: A student claims when they use their space heater and hairdryer at the same time, the power for the…

A: When too many devices are running, there is a possibility that the power supply might get tripped by…

Q: An average-sized home refrigeration unit has a 1/19-hp fan motor for blowing air over the inside…

A: Given:Fan motor power of refrigeration unit=119 hpFan motor power of blowing air unit=125 hp

Q: True or False  Like mechanical energy, current electricity transfers to PE to KE and into work?

A: In mechanical energy in various cases, the Kinetic energy transfers to potential energy and vice…

Q: The energy a body has by virtue of its location is known as

A: Asked: What the energy of a body due to virtue of its location known.

Q: State law of conservation of energy.

A: Statement of Law of conservation of Energy:The law of conservation of energy states that energy can…

Q: demonstrates a direct energy transfer? demonstrates a direct energy transfer? When the traffic…

A:

Q: What is the available energy content, in joules, of a battery that operates a 2.00-W electric clock…

A: Given data: Power, P=2.00 W Time taken, t=540 days

Q: Calculate the magnitude of the force of kinetic friction between the hockey puck and the ice.…

A: Given:

Q: Rub your hands together vigorously. What happens? Discuss the energy transfers and transformations…

A: Hands are felt warm when rubbed. When we rub the hands,hands are having kinetic energy .It is the…

Q: In the circuit shown, R,=R2=R, and ɛ2 =. The power %3D 2 dissipated in R, is 20 W. Does battery &…

A: From the given circuit diagram,

Q: From the word energy, give at least 5 words/ideas/concepts that you can think of?

A: The energy can be termed as the capacity to do work . It can be of several forms like Electrical…

Q: Calculate the time taken 34 w bulb 10 consume 21.00 J of energy?

A:

Q: esistanc

A: To overcome resistance when working through a difficult problem are as follows: a) First start with…

Q: 10-V 1₁ R1 R3 13 R2 12 5-V

A: The given circuit can be resolved using Kirchhoff's Laws: 1) Kirchhoff's Current Law: The algebraic…