Answers edited by Junaid Mirza
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Question #1471d

Question #130ab

What is the equation of the line that has a slope of #4/7# and passes through (1, 3)?

Question #85f83

A ball with a mass of #140 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #21 (kg)/s^2# and was compressed by #3/8 m# when the ball was released. How high will the ball go?

Question #1be4d

Question #a12a9

I have confusion: 1 debye = #10^ 18# esu cm = #3.335 xx 10^30# Cm ( coulomb meter), How it is? please prove. Thanks.

How do you simplify #(x2)(x+4)(x+6)#?

Question #27a97

A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and ball goes up to 2 m height further, find the magnitude of the force. Consider g = 10 m/s^2………[?]

A spring with a constant of #6/7 (kg)/s^2# is lying on the ground with one end attached to a wall. An object with a mass of #3/5 kg# and speed of #3/4 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?

Question #b1814

Question #ccd24

What is the velocity of an electron that makes a transition corresponding to the longest wavelength line of the Lyman series?

The heaviest ball made by a bowling ball company weighs 16 pounds. Last week, the company shipped 10,000 of these balls. What was the total weight of the bowling balls?

How does DNA base pairing work?

How does surface water move through the water cycle?

Question #fe59a

Question #55516

Question #b1ad6

Question #6aae5

pH of #0.1(M)# #NaH_2PO_4# is what?

A soccer ball is kicked at an angle of 45° with a speed of 20 m/s. What is the max height? How Iong does it take to reach max height? What is the hang time?

How do you simplify #9/ (9/8 +7)#?

Question #dc88f

Gold has a density of 19.3 g/cm^3. A cube of gold measure's 4.23 cm on each edge. What is the volume of the cube?

A projectile is shot from the ground at a velocity of #2 m/s# and at an angle of #(2pi)/3#. How long will it take for the projectile to land?

Some very hot rocks have a temperature of #210 ^o C# and a specific heat of #150 J/(Kg*K)#. The rocks are bathed in #121 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?

Question #164a1

An object with a mass of # 2 kg# is traveling in a circular path of a radius of #7 m#. If the object's angular velocity changes from # 7 Hz# to # 9 Hz# in # 3 s#, what torque was applied to the object?

Question #7fb40

True or false?
the gravitational force between two particles depends upon the medium between the two particles.
Thanks

Question #18be7

An object travels North at #7 m/s# for #4 s# and then travels South at #3 m/s# for # 7 s#. What are the object's average speed and velocity?

Question #8ed71

Question #a15e3

An object with a mass of # 3 kg# is traveling in a circular path of a radius of #3 m#. If the object's angular velocity changes from # 4 Hz# to # 7 Hz# in # 8 s#, what torque was applied to the object?

How do you simplify #7/8*3 1/5#?

What is the idea of Thermal Expansion?

Question #a9c10

On the moon, the acceleration due to gravity is only 1.6m/s/s downward. If someone on earth can throw a baseball 24.2 m high, how high could she throw it on the moon?

Question #2229a

What are the exact solutions of #x^2 − 3x − 7 = 0#?

A person who weighs 150 pounds on Earth would weigh 67.2 pounds on Mercury. How much would a child who weighs 60 pounds on Earth weigh on Mercury?

Question #64d01

Where does embryonic development occur in mammals?

An object with a mass of # 3 kg# is traveling in a circular path of a radius of #6 m#. If the object's angular velocity changes from # 6 Hz# to # 17 Hz# in #5 s#, what torque was applied to the object?

Question #74309

How long must a simple pendulum be if it is to make exactly one swing per second?

What type of intermolecular force of attraction is present in the given pair of molecules, #NaCl  H_2O# ?

Question #2772d

A car slows down uniformly from a speed of 21.0 m/s to rest in 6.00 sec. How far did it travel in that time?

Question #964ac

Question #5f601

How many valence electrons does Ni have?

Question #d7a4c

If the sperm cells of a fish have 12 chromosomes, how many chromosomes would be found in the cells forming the scales of the fish?

0.5 g of a base was completely neutralised by 100 ml of 0.2 N acid. equivalent weight of the base is??

Question #771b7

Question #22517

How do you solve #x^27x5=0# using quadratic formula?

A #100*mL# volume of #2.0*mol*L^1# hydrochloric acid titrated a sample of metal carbonate. What is the equivalent weight of the metal?

Question #1f709

A particle of mass 100 g is fired with velocity of 20 m/s making angle 30° with horizontal. When it reaches highest point, what is the magnitude of change in momentum?

Question #0ee53

Question #9524e

How do you solve #6\sqrt{7}\times 6\sqrt{3}#?

Question #f28b5

What is the value for #Delta G# at 5000 K if #DeltaH# = 220 kJ/mol and #DeltaS# = 0,05 kJ/(mol*K)?

Calculate the enthalpy of formation of acetic acid if its anthalpy of combustion to CO2 and H2O is  867 kJ/mol and the enthalpies of formation of CO2 and H2O are respectively  393.5 and 285.9 kJ / mol ?

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