1) A freezer has a temperature Tc = -27°C. The air in the kitchen has a temperature Th = 29°C. The freezer is not perfectly insulated, and heat leaks through the walls of the freezer at a rate of 59 W. Find the power of the motor that is needed to maintain the temperature in the freezer.

Q: In a game of freeze, a person freezes into a position shown below. As a percentage of total body…

A: Solution:  Step 1 of 3:)   Given:total mass of the body, m = 75 kgpercentage distribution of mass…

Q: An object slides on the flat ground. It comes to a stop under the influence of friction with a…

A: 1. Force = ma = m * 2.45 m/s2 Frictional force, F = μ * R = μ * mg   Equating, we get 2.45 * m = μ…

Q: Energy Conservation With Conservative Forces: When you drop a pebble from height H, it reaches the…

A: Given data:  A pebble drop from a height  Initial velocity (u) = 0 Height = H Final velocity = V New…

Q: Part A Projectile Motion: A boy throws a rock with an initial velocity of 3.13 m/s at 30.0° above…

A: Given  Angle of projectile,  θ = 30° Initial velocity,  u = 3.13 m/s  Acceleration due to gravity,…

Q: The disk of mass M= 1 kg and radius R=1 m in the figure has a mass m=30 g attached to one end. The…

A: We are given the angular velocity of system. Angular velocity is counterpart of linear velocity in…

Q: Conversion of Units: A plot of land contains 5.8 acres. How many square meters does it contain? (1.0…

A:

Q: A truck is driving down a steep incline when the driver realizes that there is a problem with the…

A: Given Data: Let us consider the given data, Initial velocity u=32ms Acceleration due to gravity…

Q: What is simultaneity? Please Use an example in your explanation

A: Simultaneity refers to events occurring at the same time, sharing a common moment.It is a concept in…

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

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

Q: 1) You are installing a heat pump whose COP is half the COP of a reversible heat pump. You plan to…

A: Given: Coefficient of performance COP of heat pump = half COP of reversible heat pump. Volume of…

Q: Free Fall: A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed vo and…

A: Given  Mass m1=10kg m2=20kg  Initial velocity v0 Maximum height reached by 10 kg mass h

Q: Acceleration: An auto manufacturer advertises that their car can go "from zero to sixty in eight…

A: Given data:  A car can go from zero to sixty in eight seconds Required: The characteristics of the…

Q: monuniform horizontal bar of mass m is supported by two assless wires against gravity. The left wire…

A: Given:- A nonuniform horizontal bar of mass mmm is supported by two massless wires against gravity.…

Q: General Questions: You are in a train traveling on a horizontal track and notice that a piece of…

A: Given statement : " you are in a train travelling on a horizontal track and notice that a piece of…

Q: Dimensional Analysis: When adding several quantities the quantities can have any combination of…

A: Given data:  Several physical quantities Required: The dimensional requirement For addition of the…

Q: A ski starts from rest and slides down a 28° incline 55 m long. • Part A If the coefficient of…

A: Given data: Angle of inclination, θ=280 Distance covered, d=55 m Coefficient of friction, μ=0.090

Q: koibok slides down a 3 m lông 30 degree incline and then transilions to a flat iictiontess fHce Thể…

A:

Q: Metric System: The metric system is preferred over the British system in science for the following…

A: We need to find why the metric system is preferred over the British system.

Q: Part A Free Fall: A ball is thrown straight up, reaches a maximum height, then falls to its initial…

A: These things are known as projectiles, and the path they take is known as a trajectory. As discussed…

Q: In the figure below, after switch S is closed at time t= 0, the emf of the source is automatically…

A:

Q: An object undergoing projectile motion was launched with an initial velocity of 15 m/s and at an…

A: Given, Initial velocity of projectile , v = 15 m/s Angle,θ = 30.0° The distance travelled in…

Q: gravity (CG), which is at the 50 cm mark. TI ck hanging from the 80 cm mark. Decide wl ther blocks…

A: Given:- The meterstick shown is L = 100 cm  it  is free to pivot around its center of gravity ( CG )…

Q: Part A Equilibrium: A push of magnitude Pacts on a box of weight Was shown in the figure. The push…

A: Given, The diagram, The push force acting on the block is P,

Q: 5) Snowballs make perfectly inelastic collisions; when two snowballs slam into each other, they…

A:

Q: 4 Calculate the magnitude and direction of the torque of each force about an axis passing through a…

A: Torque is given by  Torque = Force x perpendicular distance

Q: A ray enters an isosceles triangular prism normally from air (n 1), as shown in the figure. The…

A:

Q: (Figure 1) The car shown in the figure has mass m (this includes the mass of the wheels). The wheels…

A:

Q: When 262-nm photons are incident on the surface of a metal, electrons are ejected from it and the…

A: The required energy of incident photon is, The required kinetic energy of ejected photon is,

Q: A block of mass m is at rest on an inclined plane that can be set at any angle between 0° and 90°.…

A: Given:-  The mass of the block is m at rest on an inclined plane.  The angle of inclination is…

Q: A spring (k = 200 N/m) is fixed at the top of a frictionless plane inclined at angle 0 = 30°. A 1.9…

A:

Q: A give person has a near point of 0.45 m and a far point of 6.35 m. Imagine that this person comes…

A:

Q: Two unequal charges repel each other with a force F. Part A If both charges are tripled in…

A: Write the expression for the electric force between two charges. F=kq1q2d2 Here, k is Coulomb's law…

Q: The magnetic field in (Figure 1) is decreasing at the rate 0.60 T/s. Figure What is the magnitude…

A: Given rate of decreasing magnetic field dBdt = 0.6 T/s radius of circle r = 1 cm = 0.01 m

Q: 2. A stack of bricks with mass m=200 kg is sitting on a frictionless ramp, connected to a rope as…

A: Given that:- Mass of the stack of bricks=m=200kg

Q: An object starts at the origin (0,0). It moves for 3 seconds with a constant velocity of vo1 = 2£ +…

A:

Q: A narrow beam of ultrasonic waves reflects off the liver tumor in the figure below. If the speed of…

A:

Q: An engine removes 391 J from a reservoir at 302 K and exhausts 341 J to a reservoir at 200 K. 1) (a)…

A: Temperature of source reservoir (T1) = 302K  Heat taken by engine from source reservoir (Q1) = 391 J…

Q: 1. Sketch the electric field lines for a positive point charge. 2. If the point charge above has a…

A: The potential due a charge q at distance r is viven as V= Kq/r where q is in columb and r is in…

Q: Estimation: A reasonable estimate for the duration of a typical physics lecture is 3500 s. 600 s.…

A: I minute is equivalent to 60 second So 10 minute of lecture will be 600 second. So lecture duration…

Calorimetry

Measuring the heat transferred during chemical reactions or other physical processes is known as calorimetry. It comes under the branch of thermochemistry.