2.0 m 10m 4.0 kg 1.0 kg

Q: A man weighs 470.7 kg and is 198.8 cm tall. Calculate his Body Mass Index (BMI). BMI = (Mass in kg)…

A: BMI = mass/height^2  BMI = 470.7 / 1.988^2  BMI = 119.10

Q: An anemometer measures which of the following ?   A) Speed of light B) Speed of wind C) Speed…

A: The anemometer is the measuring device used to measure wind speed and wind pressure . The device…

Q: Find the distance covered in 2 hr Speed of car=33 km/hr

A: Given: The time interval is 2 hr. The speed of the car is 33 km/hr.

Q: 146.88 What is The answer in 2 significant figures?

A: The value 146.88 can be written as,

Q: What is the old name of physics

A: To determine  Old name of physics

Q: Find the distance covered Speed=2 km/hr Time=1 hr

A: Given data : Speed=S Time=t   To find : Distance

Q: Find distance covered Speed=20 km/hr Time=1 hr

A: Write the given values with the suitable variables. v=20 km/hrt=1 hr Here, v is the speed and t is…

Q: 30 m 40 m 30 m

A: GivenLength of rod, L=100 mMass of beam, m=210 kgm1=50 kgm3=300 kg

Q: 52.9 m/s 1.606 m/s 0.755 "/s 73.5 "/s

A:

Q: Find the distance covered Speed-23 km/hr Time=3 hr

A: Given data : Speed=S Time=t   Required : Distance

Q: What is the height of a 6 foot 1 inch tall person in Centimeters

A: height of person = 6 foot 1 inch  we know, that 1 foot = 30.48 cm  1 inch = 0.0833 ft

Q: Mr. Alexander wants to know the height of a cliff he hiked up. He drops a rock down and it takes 5.5…

A: Time taken by the rock to hit the bottom is T = 5.5 sec Initial velocity of the rock is 0 as it is a…

Q: speed at x = -4.5 m is v = 22.C

A:

Q: add the vectors

A: For the first figure, the vector equation is

Q: One billionth of a second is called: A) microsecond B) picoseconds C) millisecond D) nanosecond

A:

Q: a steel ball haa a mass equal to 15 kilograms. what is the ball's weight

A: Weight of a body of mass= 'm' kg is-  W= mg Where g= acceleration due to gravity

Q: 30 m Δ 40 m

A: Solution Correct option is (c)

Q: 5 m 4m |0. 6m 1m 100kg 6 m

A:

Q: 3.00 x 108 m/s ---------> mi/s

A: Given data:  Speed (v) = 3.00×108 m/s Required: Speed in mi/s

Q: The SI unit of momentum is _____________. A) kilogram-metre per second B) kilogram-metre per second…

A: Momentum is defined as the amount of motion occurring in something that is moving. It is the product…

Q: The values below in boxes should be written in scientific notation: 8002 x 107 -10 1000 5 J.…

A:

Q: One cubic centimeter (1.0 〖cm〗^3) of water has a mass of 1.0x10^(-3)kg at 25^0 C. Determine the mass…

A: Given:One cubic centimeter 1.0 cm3 of water has a mass of 1.0x10-3 kg at 25 ℃. To determine: Mass of…

Q: =g/cm^3 13.600 13.6 g/m^3 13600 kg/m^3

A: 1 g/cm3=1000 kg/m3 So, 13.6 g/cm3=13.6×1000=13600 kg/m3

Q: What is the mass of the object . When the weight of the object is 1200 N ?

A: Given  Weight of the object is 1200 N  Mass of object is ,M =?

Q: Which of these are SI units? centimeters newtons pounds  seconds  none of the aboves

A:

Q: The cart moved a distance of 165 cm. How many meters did the cart move? (1 meter m 100 centimeters)

A: Given: The distance moved by cart, d=165 cm   To convert the above distance into meters.

Q: A yacht is 20 m long. Express this length in feet.

A: Given data:  Length of a yacht (L) = 20 m Required:  Length in feet

Q: Water drops from a faucet at the rate of 4 drops per second. What is the distance between two…

A:

Q: 4 kg 1 kg

A:

Q: Distance is measured in the following units. Chose all the correct answers.   a. Yard   b. feet…

A: Given: Distance is measured in the following units. Chose all the correct answers

Q: Mass of a gold ring is 350mg. Its mass in Sl units is- Select one: O a. 350 x10° g O b. 3.5 x 104 kg…

A:

Q: Student Height (in feet and inches) Physics Student Mass (in kg) Stair height (in m) Time (in s) #1…

A: yeh, you have done correctly F=mg and work done W= Fd

Q: Find distance covered Speed=75 km/hr Time=1 hr

A: Given data : Time=t Speed=S   Required : Distance

Q: 2,349 m/s =  _________ km/s 0.000 08 g = _______ ug 3,000 m = _______ cm

A: Given data:  2,349 m/s 0.000 08 g 3,000 m

Q: Which ones are examples of vector quantities [select all that apply] 40 km/s South 1 Newton upwards…

A: Scalar quantity has only magnitude while vector quality has magnitude as well as direction.

Q: The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give (a) 2.75 and 2.74 (b)…

A: When rounding numbers consider the significant digits you want to round to. Here the numbers are…

Q: A rope weighs 600 grams per meter of length. What is the weight in kilograms of 12.2 meters of this…

A: We have 1 meter of length of rope whose weight is 600grams. 600grams = (600/1000)kg…

Q: 10 KG 20 KG 24 KG ? KG

A: Let the mass of cat be Mc  Let the mass of mouse be Mm  Let the mass of dog be Md

Q: 3m 3m A 6m

A: The displacement if the minimum length of the path traveled. It is a vector quantity.

Q: 6 m 4 m D 2 m 3 m 2 m

A: For the given situation the free body diagram will be: length AB = 62+32 = 6.70 m and the length AO…

Q: An object is moving with a speed 83 ft/h find its speed in the units of m/s. use 1ft 0.304 m

A: Since, 1 hr=60 min=60 ×60 sec=3600 sec1 ft=0.304 m   Hence,  83 fthr=83×0.304 m3600 sec=0.007 m/sec

Q: Which of the following is an example of veloaity? a Waking 25 am/hour b Flying 5 km/s West c Running…

A:

Q: Type of Ball Height of Bounce (cm Golf Ball 54 cm Tennis Ball 48 cm Ping Pong Ball 21 cm Baseball 9…

A: Introduction: Variable under test is dependent variable and the variable whose variation will affect…

Q: The speed of sound is 1100 ft/sec at sea level.   a. Express the speed of sound in mi/hr.  b.…

A: Given quantities: speed of sound at sea level = 1100 ft/sec   The following conversion factors are…

Q: m 4 m

A: We have given density of fluid (ρ)=875 kg/m3and g=9.8 m/s2Let F= total force in Newton on the side…

Q: 100 kg 1.0 m

A: mass of the block M = 100 kg distance between floor and block s = 1.0 m time taken by block to reach…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.