Answers created by Junaid Mirza

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• The molar specific heat capacity of chromium at room temperature is 24 j/k mol and its atomic mass is 52g what is specific heat capacity of chromium?
  
• When a vector is multiplied by number less then -1 then its magnitude and direction to original vector respectively are?
  
• Triangle A has sides of lengths #18 ,3 3 #, and #21 #. Triangle B is similar to triangle A and has a side of length #14 #. What are the possible lengths of the other two sides of triangle B?
  
• Which two ions are not in balance in this equation: #Na_2SO_4 + SrCl_2 -> NaCl + SrSO_4#?
  
• If an object is dropped, how fast will it be moving after falling #21 m#?
  
• Minor point, but any thoughts on why the following inconsistency?
  
• Please solve q 9?
  
• The dimension in centimeter of rectangular box R is 6 by 8 by 10. Which of the following cannot be total surface area, in square centimeters of two faces of R? A. 96 B. 120 C. 118 D. 160
  
• How do you solve #\frac { 1} { 2} x - \frac { 2} { 5} = \frac { 4} { 5}#?
  
• Which has more momentum, a #500kg# object moving at #1/4m/s# or a #50kg# object moving at #20m/s#?
  
• What is the wavelength, in meters, of an alpha particle with a kinetic energy of 8.0*10^-13 J. [mass of an alpha particle = 4.00150 amu; 1 amu = 1.67*10^–27 kg]?
  
• A cyclist can pedal at a speed of 3m/s for 6 min. How many meters will the cyclist pedal in that time?
  
• What is the maximum? What are the principles?
  
• Mercury vapor contains Hg atoms. What is the volume of 200. g of mercury vapor at 822 K and 0.500 atm?
  
• The length of a rectangle is 1 m more than twice its width. What is the length of the rectangle if its perimeter is 110 m?
  
• X takes 3 hrs more than Y to walk 30 km. But, if X doubles his pace, he is ahead of Y by 1.5 hrs. What is their speed of walking?
  
• The ratio of speed of sound in nitrogen gas to that of helium gas at 300k is. 1)✓2/7. 2)✓1/7. 3) ✓7 4) ✓6/5?
  
• What will be the impulse if force at 10 s is 10 N ?(SSETR 2018 EXAM)
  
• What are the quantum numbers for 5th and 6th and 7th electrons of potassium?
  
• How do I match these Trophic Levels Terms correctly?
  
• How do I match these Solar Energy and Photosynthesis terms correctly?
  
• A wire has a resistance R If its length is doubled and radius is reduced to half then its resistance will become? (A) 2R (B) 4R(Cy8R D) 16R
  
• Calculate the answer. Express it in scientific notation. All answers should have the correct number of significant figures. #4.9 xx 10^(-2) cdot 9.80 xx 10^2 = ?#
  
• #1 xx 10^21# molecules are removed from #280" mg"# of carbon monoxide. Calculate the number of moles of carbon monoxide left? [Answer:#8.4 xx 10^- 3" moles"#]
  
• What is the volume of 0.900 moles of an ideal gas at 298 K and a pressure of 1.25 atm?
  
• At 35°C, argon has a velocity of 300 m/s. What is the velocity of helium at the same temperature?
  
• If Denise can run 5 km in 30 minutes and Clark can run 6 km in 39 minutes, who's faster?
  
• Spin quantum number for the last electron in potassium is?
  
• A circuit has two #"6 Ω"# resistors in parallel, given input current is 6A, What is the current at one resistor?
  
• How is the atomic mass number changed by gamma decay?
  
• What is the electron configuration of #Ni^(2+)#?
  
• How much work does it take to raise a #7 kg # weight #16 m #?
  
• What is the number of electrons on the outer shell of nickel?
  
• If the radius of first orbit of hydrogen atom is R the de Broglie wavelength of an electron in the third orbit is ?
  
• A grinding wheel has a diameter of 200mm. If it rotates at 2100 rev/min. What is the circumferential speed?
  
• A plane could fly at an average speed of 694 m/s. Calculate how long it would take the plane to fly around the world (which is #4.00 xx 10^7\ "m"#)?
  
• A .6 kg brick is dropped from a height of 8 m. It hits the ground and comes to rest. What is the magnitude of the impulse exerted by the ground on the brick?
  
• How much power is produced if a voltage of #3 V# is applied to a circuit with a resistance of #54 Omega#?
  
• A projectile is projected with speed of 19.6 m/s with angle 30 degrees.what is the verticle component of it's velocity after 1sec of flight?
  
• Simplify: 5√(32)raised to power -3?
  
• Calculate the values of the molar heat capacities Cv and Cp of a gas,if the ratio of the heat capacities is 1.33.What is the atomicity of the gas?Given R=8.31J/mol-k.
  
• Find the no.of moles of 360gm of sucrose?
  
• Which compound has the empirical formula with the greatest mass? A. #C_2 H_6# B. #C_4 H_10# C. #C_5 H_10# D. #C_6 H_6#
  
• How to calculate pi bond and sigma bond for #"CH"_2"=C=CHCH"_3#?
  
• If a projectile is shot at an angle of #pi/2# and at a velocity of #31 m/s#, when will it reach its maximum height??
  
• It takes Luke 1 hr and 45 mins to run 14 miles. What is his average speed?
  
• A small square window has an area of 36 square inches. What is the length of each side?
  
• Three kids in a parking lot launch a rocket that rises into the air along a 442-m long arc in 40 s. What is the average speed?
  
• How many grams of water would require 2,153 joules of heat to raise its temperature from 44 °C to 81 °C? The specific heat of water is 4.184 J/g °C.
  
• What is the area of a rectangle with a width of 4.6 ft and height of 3.5 ft?
  
• What is the ground-state electron configuration of a neutral atom of oxygen?
  
• Question: A rectangular building lot measures 1.00*10^2 ft. by 1.50*10^2 ft. Determine the area of this lot?
  
• Work out? Two identical charged bodies are 3 cm apart exert a force of #4 × 10^-4\ "N"# on each other. The charge on each body is_______? Thanks
  
• What is the frequency of a sound wave having a velocity of 341 meters/second and a wavelength of 0.8 meters? 426 hertz 400 hertz 800 hertz 210 hertz
  
• A marble dropped from a bridge strikes the water in 5.0 s. what is the height of the bridge? (Answer in meters)A
  
• How would you find the number of grams of CO2 that exert a pressure of 785 torrs at a volume of 32.5 L and a temperature of 32 degrees C?
  
• If the temperature of 1 gram of water changes from 22°C to 27°C, how many calories of heat were involved? How many joules?
  
• An object is thrown vertically at a height of #7 m# at #1 m/s#. How long will it take for the object to hit the ground?
  
• How can i calculate the speed of sound on a day when a 1500 hz frequency has a wavelength of 0.221 m.?
  
• Could anyone help me with parts B, C, and E it would be greatly appreciated?
  
• Find angle between unit vectors I+j+k cap And I+j cap by cross product?
  
• In a sample of H-atom electrons make transition from 5th excited state upto ground state, producing all possible types of photons, then find out the number of lines in Infrared region?
  
• Is density an intensive or extensive property?
  
• Light travels at approximately #3.0*10^8# #m##/##sec#, How far does light travel in one week?
  
• The circumference of a circle is 6.5 cm. What is its diameter?
  
• Nitrogen lazer produces a radiation at a wavelength of 337.1nm. If the number of photons emitted is #5.6×10^25# per second. Calculate the power of this laser?
  
• The radioactive element thorium-234 has a half-life of approximately 24 days. If I started with 82 grams of it, how much thorium would remain after 96 days?
  
• If p = 0.25, then q must equal ?
  
• A gas sample in a rigid container at 455 K is brought to STP (273K and 1 atm). What was the original pressure of the gas in mmHg?
  
• How many atomic orbitals does carbon access?
  
• What charge does calcium, Ca, have when it becomes an ion?
  
• If you want to lower waters freezing point by 23°C by adding #"MgF"_2#, what must the molality of the solution be?
  
• If you have lamp with 300 W power output And the average wavelength of the source is 590nm how many photons are emitted per second?
  
• What's the lateral area and surface area of a right cone with radius 6 cm and slant height 13 cm?
  
• An open-ended pipe is 6 meters long. What is the wavelength of a first harmonic standing wave?
  
• Two projectiles, one fired from earth with 5m/s and other from another planet with 3m/s trace identical trajectory. If g (earth) = 9.8 m/s², then g (planet) = ?
  
• Use the formula #2n^2# How many electrons could energy level five have?
  
• What is the answer for volume used by 9.6g of SO2 gas at a pressure of 830 Pa and at a temperature of 327°C?
  
• How many moles of #Na^+# ions are in 150 mL of a 0.200 M #Na_3PO_4# solution?
  
• If the initial of an ideal gas at 2.250 atm is 62.00°c, what final temperature would cause the pressure to be reduced to 1.750 atm?
  
• What's the volume in litres of 0.5mol of oxygen at STP?
  
• If 425.0 g of mercury at 25.0 degrees Celsius absorbs .750 Kilo joules of heat energy, what will be it's final temperature?
  
• Calculate the pH of a solution with a pOH of 5. Is this solution acidic or basic?
  
• The average temperature at the South Pole in September is #-53.1^o C#. How would you convert this temperature to degrees Fahrenheit?
  
• A nitrogen gas laser pulse with a wavelength of 337 nm contains 3.83 mJ of energy. How many photons does it contain?
  
• Moles n solution: Calculate the molarity of a solution of NaOH made by dissolving 2moles of sodium hydroxide in water and making up to 250cm^3?
  
• An aeroplane flying in the sky dives with a speed of 100 m/s in vertical circle of radius 200m.weight of the pilot sitting in it is 75kg. The force with which the pilot presses his seat when aeroplane is at highest position ?(in kg wt)
  
• A meter scale is held vertically with one of the ends on the floor without slipping.the velocity of the upper end of the scale when it hits the floor is?? 9.8m/s 8.9 45 5.4
  
• In 1990, the population of Delray Beach, Florida was 47,184. In 2000, the population was 60,020. What is the percent of change in population?
  
• What is the frequency of a sound wave with a wavelength of 0.04 meter in air? What type of wave is this, transverse or longitudinal
  
• Complete the nuclear equation?
  
• What does the number 232 represent in Thorium?
  
• What is the mass of a sample of material that has a volume of 55.1 #cm^3# and a density of 6.72 g/#cm^3#?
  
• How fast will an object with a mass of #24 kg# accelerate if a force # 12 N# is constantly applied to it?
  
• How fast will an object with a mass of #16 kg# accelerate if a force of #92 N# is constantly applied to it?
  
• It takes 3,190 J to increase the temperature of a 0.400 kg sample of glass from 273 K to 308 K. What is the specific heat for this type of glass?
  
• How can I prove this equation: #"mvr" = "nh"/(2π)#?
  
• Convert 22m/s^2 to km/m^2?
  
• What is the change in the object’s velocity from t=4 to t=10?
  
• 'If a sound traveling through a medium has a frequency of 520 Hertz and a wavelength of 6.92 M, what is its speed?'
  
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