Answers edited by Junaid Mirza
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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 #a12a9

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 #164a1

How many valence electrons does Ni have?

What is the idea of Thermal Expansion?

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?

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

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

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?

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?

Where does embryonic development occur in mammals?

Question #22517

How does surface water move through the water cycle?

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

Question #9524e

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

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

Question #1be4d

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?

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

Question #b1ad6

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?

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

Question #7fb40

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

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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?

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Question #27a97

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 #ccd24

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?

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?

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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?

Question #0ee53

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 ?

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

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

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 #1f709

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?

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

Question #55516

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

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………[?]

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

How does DNA base pairing work?

Question #964ac

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?

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

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Question #5f601

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

Question #8ed71

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?

Question #771b7

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

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