A small electric immersion heater is used to heat 65 g of water for a cup of instant coffee. The heater is labeled “ 190 watts" (it converts electrical energy to thermal energy at this rate). Calculate the time required to bring all this water from 18°C to 100°C, ignoring any heat losses. (The specific heat of water is 4186 J/kg-K.)

Q: could you please specify which numbers are superscripts ie the the πa2 written as πa2? Also section…

A: Given, Magnetic field by wire and ring

Q: (a)A car speedometer has a 5% uncertainty. What is the range of possible speeds (in km/h) when it…

A:

Q: How many 4-digit even numbers can be made from the digits 0; 2; 3; 7; 8; 9 if the number has…

A: The numbers can be formed from the given different digits differently. These digits are formed by…

Q: Calculate a light-year in [a] km and [b] Mile

A: We are given with the following information : Speed of light=3*108 m/s=3*105 km/ s=1.86*105 mile/s…

Q: The number of viruses (V , measured in trillions or 10¹²) that infect a person is a function of the…

A: Fever as a function of immunosuppression F(I) =37+2*I^2 If immunosuppression is complete then fever…

Q: acceleration due

A: We say formulas used in physics are consistent with SI unit. The quantities that are independent of…

Q: We are going to make a simple approximation of the number of atoms in the universe. Assume all the…

A: Given that, Density of sun = 1.4 g/cm3 Radius of sun = 7.0×108 m =7.0×1010 cm Mass of the sun =…

Q: Express the number of seconds per minute sSm, the number of minutes per hour mh, the number of hours…

A: For, 1 minute In 1 minute there is 60 sec 1m=60s1m=1s×601m1s=60 So 1m1s=sm=60 For 1 hour In 1 hour…

Q: Hi there! can you please tell me why you didn't use a value for m in the first question?

A:

Q: Given that the average size of a human skin cell is about 10 microns across, which of the following…

A: Scientists estimate that the human body is made up of around 10 trillion cells in total. Your skin…

Q: 0405 What is to the proper number of significant figures? 0.76

A:

Q: 18. An intelligent alien living on a planet in the solar system orbiting Alpha Centauri, the nearest…

A: The time taken by the Alien to receive signals is, t=dv=4.367 light year6.0×1012 miles1 light…

Q: The kinetic energy varies directly as the square of the momentum (?) and inversely as the mass (?).…

A:

Q: Rank these SI distance units from smallest to largest: μm, am, fm, nm, mm, cm, m, km, Gm, Tm, Mm,…

A: Rank these SI distance units from smallest to largest: μm, am, fm, nm, mm, cm, m, km, Gm, Tm, Mm,…

Q: I have a question for the square root of units. So I have the formula 2pi√m/k And m=50g and…

A: The formula that you are using is the formula of time. T = 2pi√m/k Here, T is time period in second.…

Q: Convert 150 cm1.5 to an equivalent number of m1.5, given that 100 cm = 1 m   Give your answer to 2…

A: It is given that, 1 cm=10-2 m. It is required to convert 150 cm1.5 into m1.5.

Q: A car speedometer has a 8% uncertainty. What is the range of possible speeds (in km/h) when it reads…

A:

Q: Angular momentum (L) of a thin slice rotating around an axis is given by 1. L = mr"wm where w is…

A: The angular momentum can be defined as the linear momentum of rotating system. The angular momentum…

Q: Problem 2. Kinetic energy K has dimensions kg m²/s². It can be written in terms of the momen- um p…

A:

Q: at kt10 Consider the equation s = 6v where S is a length, vis a velocity and tis time. a) If the…

A: s=at610+kt106v S=[L] v=[LT-1] t=[T]

Q: Given that 1 treky is equal to 7.08 x 10 yards. How many Gm are there in 81.0 treky? Report your…

A:

Q: A car speedometer has a 5% uncertainty. What is the range of possible speeds (in km/h) when it reads…

A: Given:-  The uncertainty of the speedometer of the car is 5 %  The speed of car read by the…

Q: A car speedometer has a 8% uncertainty. What is the range of possible speeds (in km/h) when it reads…

A: Given:- ∆vv×100= 8% v= 50 km/h

Q: Estimates and orders of magnitude: Four astronauts are in a spherical space station. (a) If, as is…

A: We need to breathe oxygen to live. We need oxygen because our cells break down molecules in our…

Q: A car takes time t=(2.5±0.1) s to travel a distance Ax=(0.922±0.001) m. What is the relative…

A:

Q: Directions: Choose the leltel 1. A meter ruler is used to measure a length. Which reading is shown…

A: The relationship between millimetre and meter is: 1mm=11000m

Q: how it become 0.829? if i multiply the numbers it will give me 5096?

A:

Q: Between what two integers is : (160 x 10 10 – 5 x 10 ") * * 1.1 x 10 - 11 & Which integer is it…

A:

Q: Assume your hair grows at a rate of 1/44th of an inch per day. How fast is that in nm/s (nanometers…

A: Relation between units of length: 1 inch =2.54×107 nm units of time: 1 day=24×3600 s Grow rate of…

Q: A person measures his or her heart rate by counting the number of beats in 30s. If 40+1 beats are…

A: Given the number of beats is 40. And the uncertainty with beats is 1. The time is defined as 30 s,…

Q: A cheetah was observed traveling a distance (d) of 100.0 + 0.2 m in a time period (At) of 2.98 0.01…

A:

Q: when solving for r WHY we take out Q1 out frok the denominator?? that is not correct!!!…

A:

Q: The dimensions of the quantity kinetic energy, designated by K, are kg m/s, It can be written in…

A:

Q: (Please refer to Fig. 1) W = FAx (Equation 1) F = qE (Equation 2) APEetec = -W (Equation 3)…

A: The derived equation is the change in electrical potential energy which is defined as the product of…

Q: (금)' + (능)' =1 x? + (4 – y)? = 25

A: Simplification of quadratic equation in fraction:

Q: ) A schoolgirl steps on a scale which reads 32.7 kilograms. We know that the scale has measurement…

A:

Q: A right circular cylinder has a diameter of 1.1 in and a height of 8 ft. (a) What is the volume of…

A:

Q: What is the square root of 1023?

A: The given number is x=1023 The square root of this number is written as x=1023 Or in another form,…

Q: In this problem, the symbols M, L, and T represent the dimensions mass, length, and time,…

A: