Answers edited by Junaid Mirza

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How does surface water move through the water cycle?
Question #55516
Some very hot rocks have a temperature of $210^{o} C$ $210 ^o C$ and a specific heat of $150 \frac{J}{K g \cdot K}$ $150 J/(Kg*K)$ . The rocks are bathed in $121 L$ $121 L$ of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?
An object with a mass of $3 k g$ $3 kg$ is traveling in a circular path of a radius of $3 m$ $3 m$ . If the object's angular velocity changes from $4 H z$ $4 Hz$ to $7 H z$ $7 Hz$ in $8 s$ $8 s$ , what torque was applied to the object?
How do you simplify $\frac{7}{8} \cdot 3 \frac{1}{5}$ $7/8*3 1/5$ ?
A projectile is shot from the ground at a velocity of $2 \frac{m}{s}$ $2 m/s$ and at an angle of $\frac{2 π}{3}$ $(2pi)/3$ . How long will it take for the projectile to land?
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?
Question #fe59a
Question #0ee53
What is the idea of Thermal Expansion?
Question #27a97
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Question #6aae5
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?
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 #b1ad6
Question #1be4d
What are the exact solutions of $x^{2} - 3 x - 7 = 0$ $x^2 − 3x − 7 = 0$ ?
Question #dc88f
Question #1471d
An object with a mass of $2 k g$ $2 kg$ is traveling in a circular path of a radius of $7 m$ $7 m$ . If the object's angular velocity changes from $7 H z$ $7 Hz$ to $9 H z$ $9 Hz$ in $3 s$ $3 s$ , what torque was applied to the object?
Question #2229a
I have confusion: 1 debye = $10^{- 18}$ $10^ -18$ esu cm = $3.335 \times 10^{30}$ $3.335 xx 10^30$ C-m ( coulomb meter), How it is? please prove. Thanks.
A ball with a mass of $140 g$ $140 g$ is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of $21 \frac{k g}{s^{2}}$ $21 (kg)/s^2$ and was compressed by $\frac{3}{8} m$ $3/8 m$ when the ball was released. How high will the ball go?
How do you solve $6 \sqrt{7} \times 6 \sqrt{3}$ $6\sqrt{7}\times 6\sqrt{3}$ ?
Question #1f709
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Question #85f83
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 #130ab
Question #22517
Where does embryonic development occur in mammals?
What is the equation of the line that has a slope of $\frac{4}{7}$ $4/7$ and passes through (1, 3)?
A $100 \cdot m L$ $100*mL$ volume of $2.0 \cdot m o l \cdot L^{- 1}$ $2.0*mol*L^-1$ hydrochloric acid titrated a sample of metal carbonate. What is the equivalent weight of the metal?
What type of intermolecular force of attraction is present in the given pair of molecules, $N a C l - H_{2} O$ $NaCl - H_2O$ ?
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?
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 ?
A spring with a constant of $\frac{6}{7} \frac{k g}{s^{2}}$ $6/7 (kg)/s^2$ is lying on the ground with one end attached to a wall. An object with a mass of $\frac{3}{5} k g$ $3/5 kg$ and speed of $\frac{3}{4} \frac{m}{s}$ $3/4 m/s$ collides with and compresses the spring until it stops moving. How much will the spring compress?
How do you simplify $(x - 2) (x + 4) (x + 6)$ $(x-2)(x+4)(x+6)$ ?
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?
Question #9524e
Question #2772d
Question #18be7
How many valence electrons does Ni have?
An object with a mass of $3 k g$ $3 kg$ is traveling in a circular path of a radius of $6 m$ $6 m$ . If the object's angular velocity changes from $6 H z$ $6 Hz$ to $17 H z$ $17 Hz$ in $5 s$ $5 s$ , what torque was applied to the object?
How long must a simple pendulum be if it is to make exactly one swing per second?
How do you simplify $\frac{9}{\frac{9}{8} + 7}$ $9/ (9/8 +7)$ ?
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?
True or false? the gravitational force between two particles depends upon the medium between the two particles. Thanks
Question #964ac
pH of $0.1 (M)$ $0.1(M)$ $N a H_{2} P O_{4}$ $NaH_2PO_4$ is what?
Question #d7a4c
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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
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………[?]
How does DNA base pairing work?
Question #5f601
Question #74309
0.5 g of a base was completely neutralised by 100 ml of 0.2 N acid. equivalent weight of the base is??
An object travels North at $7 \frac{m}{s}$ $7 m/s$ for $4 s$ $4 s$ and then travels South at $3 \frac{m}{s}$ $3 m/s$ for $7 s$ $7 s$ . What are the object's average speed and velocity?
Question #ccd24
How do you solve $x^{2} - 7 x - 5 = 0$ $x^2-7x-5=0$ using quadratic formula?
Question #7fb40
What is the value for $Delta G$ at 5000 K if $DeltaH$ = -220 kJ/mol and $DeltaS$ = -0,05 kJ/(mol*K)?
Question #a15e3
Question #a9c10
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