Use Newton’s Law of Cooling, T = C + (T0 - C)ekt, to solve, A bottle of juice initially has a temperature of 70°F. It is left to cool in a refrigerator that has a temperature of 45°F. After 10 minutes, the temperature of the juice is 55°F. Solve, a. Use Newton’s Law of Cooling to find a model for the temperature of the juice, T, after t minutes. b. What is the temperature of the juice after 15 minutes? c. When will the temperature of the juice be 50°F?

Q: Identify the law used to find the direction of eddy currents. a) Lenz’s law b) Maxwell’s law c) Ampe...

A: A

Q: A small ball is fastened to a string 24 cm long and suspended from a fixed point P to make a conical...

A: length of string L=24cm radius r=24sin15=6.21 cm=0.0621m centripetal acceleration ac=v2r

Q: Often, when people have to work around radioactive materials spills, we see them wearing white cover...

A: The radiations interact with the charged particles that are present in the material. As the density ...

Q: What is the instrument used in Faraday’s experiment? a) Galvanometer b) Ammeter c) Voltmeter d) Mete...

A: A

Q: What is the space around a current-carrying conductor, in which its magnetic effect can be experienc...

A: C

Q: line of force in a magnetic field represents the direction at each point that a magnetic needle plac...

A: A

Q: Under which of these conditions, the torque acting on the current carrying loop is minimum? a) θ = 0...

A: B

Q: Give the SI unit of magnetic dipole moment. a) A-2m b) Am-2 c) A2m d) Am2

A: Introduction: When a current-carrying coil is suspended in a magnetic field, it experiences a torque...

Q: bar of length 0.15 m slides along metal rails at a speed of 5 m/s. The bar and rails are in a magnet...

A: B

Q: metal rod is forced to move with constant velocity along two parallel metal rails, connected with a ...

A: D

Q: The electric motor exerts a 500 N m-torque on the aluminum shaft ABCD when it is rotating at a const...

A:

Q: I got the answer Just show me how to solve this problem

A: Let y’(t) and y”(t) denote the first and second-order derivative of the given function y(t).

Q: freely moving et u lucsc). Show that the proup speed of th -) A quantm partice of mass m TS a Speed ...

A:

Q: When is the angle of dip at a place equal to 45o? a) When the vertical and horizontal components of ...

A: A

Q: Resolve the horizontal 600-1b force in Fig. 2-12a into components acting along the u and e axes and ...

A: Given: The diagrams are as follows: Introduction: A force is a push or a pull upon an object result...

Q: cyclotron has an oscillatory frequency of 12 MHz and a dee radius of 50 cm. Calculate the magnetic f...

A: C

Q: The relative permeability of a medium is 0.050. What is its magnetic susceptibility? a) 500 b) 501 c...

A: D

Q: 2. Three point charges are located at the corners of an equilateral triangle of length 0.500 m. Find...

A:

Q: 4. Very cold neutrons can be generated that fall in the gravitational field and bounce back from a s...

A:

Q: Q3: An-type semiconductor crystal with 12 mm long ,5mm wide and Imm thick has magnetic density of 0....

A: Given, Length l=12 mm Width w=5 mm Thickness t=1 mm Magnetic density B=0.5 wb/m2 Hall coefficient RH...

Q: How can we map out CMBR?

A: Given: A mapping of CMBR is given as,

Q: The angle at which a charged particle moves through a magnetic field with a velocity, having zero ma...

A: B

Q: An object is placed a distance yo = -2f in front of a convex lens of focal length f that is located ...

A: Given, Object distance , u=yo=-2f Focal length =f   Considering the lens formula, 1u+1v=1f⇒-12f+1yi=...

Q: q2

A: According to Newton's Second law of motion F = ma Where m = mass of an object, a = acceleration of t...

Q: Find the false statement. a) Magnetic intensity is a vector quantity b) Induced magnetization is a p...

A: C

Q: Which of the following will experience a maximum force, when projected with the same velocity perpen...

A: D

Q: A uniform ladder 10m long and weighing 350N rests against a smooth wall at an angle of 30° with the ...

A: Given : WL=350N              Wm=700N               θ=30°               l=10m               r=6m Refe...

Q: b Find the center of mass and moment of inertia for a quarter of a regular circular plate of radius ...

A: The center of mass of a body is a point where the entire mass can be considered to be concentrated. ...

Q: Identify the expression for magnetic induction from the following. a) B = μo(H+I) b) B = μo(H×I) c )...

A: A

Q: Isolated magnetic poles exist. State true or false. a) True b) False

A: B

Q: The sensitivity of the meter bridge is at the peak when all resistors have the same order. a) True b...

A: A

Q: Both magnetization and magnetic intensity have the same unit. a) True b) False

A: A

Q: Under which of these conditions, the torque acting on the current carrying loop is minimum? a) θ = 0...

A: torque on a current-carrying loop kept in a magnetic field is given by torque= M⇀XB⇀ Where M⇀ is mag...

Q: Find the correct combination regarding relative permeability and magnetic susceptibility of a parama...

A: D

Q: Four point charges are equally separated by 1.00 m in air as shown. If q1 = 3.0 nC, q2 = -4.0 nC, q3...

A:

Q: Find the true statement. a) Motional emf is inversely proportional to speed of electric conductor b)...

A: motional emf =-Blv motional emf is directly proportional to the magnetic field, length of the conduc...

Q: Which among the following is true about magnetic susceptibility? a) It is the ratio of magnetic inte...

A: B

Q: Ocean waves are traveling to the east at 3.6 m/s with a distance of 16 m between crests. (a) With wh...

A: Solution:   Given Values, Speed of waves(v)=3.6 m/s Distance between crests=Wavelength=λ=16 m Freque...

Q: Q3: In a solid consider the energy level lying (0.1leV ) below the Fermi level. Find the probability...

A: The difference between the Fermi energy level EF and the given energy level E is  EF-E=0.11 eV The p...

Q: The moon's radius is 1.74 x 106 m, and the acceleration due to gravity on the moon is 1.63 m/s2. For...

A: we know that, g = GM/ R2 So,  GM/ R = g * R Velocity of satelite, V = √ (GM/R)  = √(1.63*1.74*106)  ...

Q: Identify the expression for ampere’s circuital law from the following? a) ∮ B .dl = μ0I b) ∮ B .dl =...

A: A

Q: What is the max mass block m can be without moving? I would suggest an x & y table in which we c...

A: The total force on x direction is zero, ∑Fy=0n1=m1gcosθ=4 kg9.8 m/s2cos 30°=33.98 N μsn1=0.333.98 N=...

Q: 36 cells, each of emf 4V are connected in series and kept in a box. The combination shows an emf of ...

A: D

Q: (a) How high will water rise in a glass capillary tube with a 0.500-mm radius? (b) How much gravitat...

A: (A). The height gained by water is given by h=2γcosθρgr Substitute the necessary values in above exp...

Q: How do I solve this question

A: (a) The height of the table can be calculated by using the kinematic equation, In the vertical direc...

Q: Glass is made from the mixture of: A) Sand and silicates B) Salt and Sand C) Salt and silicates D) N...

A: The glass is generally made up of sand and silicates. The primary constituent is sand and the second...

Q: While a helicopter hovers 1000 ft above the water, its pilot spies a man in a lifeboat through an an...

A: For a right-angled triangle as shown in the figure below,  tanθ = PB

Q: A capacitor of 800 mF has a voltage of 14 sin(400t). The energy stored in it at t = 40 ms is:

A: Given, Capacitor,C=800mF=800×10-3F=0.8FVoltage,V=14sin(400t)Time,t=40ms=40×10-3s=4×10-2sEnergy,U=? U...

Q: A 1024-kg blue ball is dropped from an initial z-position of 3.7 x 106 m through the center of a pla...

A: Mass of Ball=m=1024 kgMass of planet=M=33.4×1015 kgDistance between them, r= radius + heightradius =...

Q: Consider a small object of mass m attached to one end of a string and whirled in a vertical circle o...

A: Given that a mass m attached to a string is whirled in a vertical circle of radius R which moves wit...