Science

PhysicsQ&A LibraryA child's electronic toy is supplied by three 1.58 V alkaline cells having internal resistances of 0.0210 0 in series with a 1.53 (a) Draw a circuit diagram of the toy and its batteries. (Submit a file with a maximum size of 1 MB.) Choose File No file chosen (b) What current (in A) flows? (c) How much power (in W) is supplied to the load? (d) What is the internal resistance (in 0) of the dry cell if it goes bad, resulting in only 0.500 W being supplied to the load?Start your trial now! First week only $4.99!*arrow_forward*

Question

Need help with these practice questions, I’m trying to figure out how to get an answer

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: (a) A monatomic ideal gas expands at constant pressure. Is heat added to the system or taken from th...

A: Click to see the answer

Q: When viewed through a magnifying glass, a stamp that is 1.9 cm wide appears upright and 5.2 cm wide...

A: Click to see the answer

Q: 10.A radioactive material, such as the isotope thorium-234, disintegrates at a rate proportional to ...

A: Write the given differential equation. In order to calculate the general solution of this question,...

Q: Chapter 04, Concept Question 02 The figure shows the initial position i and the final position Fof a...

A: Given: There are two point i and f,

Q: A ball is dropped at 1.5 meters above the ground in 1.2 seconds. What is its velocity. Other forces ...

A: When the ball reaches ground its displacement is s=-1.5 m Time taken to reach ground t=1.2 s The bal...

Q: How many times does a human heart beat during a person’s lifetime? How many gallons of blood does it...

A: Number of beats per minute, n = 84 blood pump in each beat = 50 cm3

Q: Physics Question

A: Given quantities: Magnitude of electric field (E) = 4.5 MV/m length of the membrane (L) = 8.5 nm L...

Q: A crane pulls a 700 kg box at a constant velocity straight up for a distance of 50 m. Calculate the ...

A: Click to see the answer

Q: Determine the acceleration of an object if it accelerates from 33.4m/s to 18.9m/s over a distance of...

A: Given data The initial velocity of the object is u = 33.4 m/s. The final velocity of the object is v...

Q: A bunch of grapes is placed in a spring scale at a supermarket.The grapes oscillate up and down with...

A: Click to see the answer

Q: I'm confused on how to solve when adding a third element .

A: Given:m1=6.8 kgv1=10.3 m/sθ1=45°m2=7.3 kgv2=15.7 m/sm3=4.2 kgv3=6.5 m/s Free body diagram:

Q: A uniform solid disk of massm = 2.97 kg and radius r = 0.200 m rotates about a fixed axis perpendicu...

A: Given Data: The mass of disk is m = 2.97 kg. The radius of disk is r = 0.2 m. The angular velocity ...

Q: The hydrogen atom consists of one electron and oneproton. In the Bohr model of the hydrogen atom, th...

A: Given: The radius of orbit is 0.592x10-10 m.

Q: Solve #2 b

A: Given quantities: Height of the cliff (H) = 45 m distance of the target (d) = 240 m acceleration due...

Q: A ball starts from rest and rolls down a hill with uniform acceleration, traveling 200 m during the ...

A: Since the ball starts from rest the initial position is zero, and initial velocity is zero, the tota...

Q: A vibrating structural beam in a spacecraft can cause problemsif the frequency of vibration is fairl...

A: Amplitude, A = 0.25 mm Frequency, f = 110 vibrations per second

Q: Parts h and i

A: Click to see the answer

Q: A system of 1525 particles, each of which is either an electronor a proton, has a net charge of -5.4...

A: The total number of particles in this system, N=1525 The net charge, Q=-5.456×10-17 C Since the ...

Q: Two roomates are disagreeing over where to place a 90 kg couch. Katie is pushing the couch to the ri...

A: Newton's second law of motion is, Fnet=ma Here, m is mass and a is acceleration. Assume Rosa is push...

Q: A ceramic coffee cup, with m = 116 g and c = 1090 J>1kg # K2,is initially at room temperature 124...

A: It is given that, m=116 gc=1090 J/(kg.K)cwater=4.18 kJ/(kg.K)

Q: Two point charges lie on the x axis. Acharge of +8.9 mC is at the origin, and a charge of -6.1 mC is...

A: Analyze the diagram of three charges which is shown below. Here, x is the distance from the charge ...

Q: You have a pulley 11.8 cm in diameter and with a mass of 1.4 kg. You get to wondering whether the pu...

A: The radius of the disk is r=d2=11.82=5.9 cm=0.059 m The moment of inertia of the considering as d...

Q: A 9.12kg object speeds up from 16m/s to 46.53m/s over a distance of 117.23m. What is the acceleratio...

A: Click to see the answer

Q: A police car traveling south toward Sioux Falls, Iowa, at 160 km/h pursues a truck traveling east aw...

A: Distance of police car from Sioux Falls y=50 km Distance of truck from Sioux Falls x=40 km Speed of ...

Q: Three cars of equal mass and velocities are traveling south down 41 through Acworth. When they each ...

A: Given Data: Masses of car are equal i.e. m1=m2=m3=m Velocities of the car are equal i.e. u1=u2=u3=u ...

Q: Solve number 1 B

A: Given, initial speed, u = 30 km/h = 8.3 m/s final speed, v =120 km/h = 33.3 m/s time, t = 8.4 s (a) ...

Q: A book slides off a horizontal tabletop. As it leaves the table’s edge, the book has a horizontal ve...

A: a) The time would stay the same because the V initial is in x-direction and does not influence the a...

Q: What is the approximate percent uncertainty in the measurement given 1.57 m2?

A: The given measured quantity is,

Q: An object is pulled 10 feet across a floor using a force of 85 pounds. The direction of the force is...

A: force vector can be expressed as F→=85 lbcos60°i^+sin60°j^

Q: Why it is important to use a pulley of small mass with low friction in static measurements?

A: Introduction: The friction is a resistance offered by the body with friction against the relative mo...

Q: How many times longer than the mean life of an extremely unstable atomic nucleus is the lifetime of ...

A: Solution:-

Q: A charged rod is brought near a suspended object, which is attracted to the rod. Can we conclude tha...

A: If the suspended object is neutral then bringing a positively charged rod near to it cause the distr...

Q: As a rough approximation, consider an electric eel to be a parallel-plate capacitor with plates of a...

A: area, A = 1.8 x 10-2 m2 distance, d = 2 m Dielectric constant, K = 95

Q: A man of weight W is on the top of a symmetric two-legged ladder, which is standing on a horizontal ...

A: Here given that, W weight is applied on both the legs of the ladder, therefore there are 2 normal re...

Q: A 1500 kg car accelerates from 15 m/s to 25 m/s. Calculate the impulse experienced by the car.

A: The impulse experienced by the object equals the change in momentum of the object. Hence the express...

Q: Why is dry air insulator and moist air conductor of electricity

A: Air is a bad conductor of electricity. The dry air contains static charges, which do not conduct unl...

Q: (a) When switched on, the trimmer speeds up from 0 to 2 700 rev/min in 0.200 s. What average power i...

A: Given, A grass string trimmer has 100 g of cord wounded in a spool The diameter of the spool are, In...