09/12/23

Please help with this Question!
Consider the following data set. What would this data set look like if the measurements were more precise? Time (mm:ss) Mass (g) 00:00 614 00:05 603 00:10 595 00:15 593 00:20 593
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09/02/23

A certain ore is 27.3% nickel by mass. How many kilograms of this ore would you need to dig up to have 40.0 g of nickel?
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05/06/23

A 25.0 mL solution of HBr is neutralized with 22.3 mL of 0.105 M Sr(OH)₂. What is the concentration of the original HBr solution?
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05/05/23

A 10.0 meter chain weighing 39.2 newtons per meter (4.0 kilograms per meter) is lying coiled on the ground.
A 10.0 meter chain weighing 39.2 newtons per meter (4.0 kilograms per meter) is lying coiled on the ground. How much work is done to raise one end of the chain to a height of 10.0 meters so that... more
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05/05/23

A force of 5 pounds compresses a 15-inch spring a total of 4 inches. Calculate the amount of work done in compressing the spring 7 inches.
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05/05/23

how many photons
A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 596 nm, while the power is 2.1 W. During surgery, the laser beam is turned on for 0.055... more
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05/05/23

radioactive activity
A device used in radiation therapy for cancer contains 0.79 g of cobalt-60 (59.933 819 u). The half-life of this isotope is 5.27 yr. Determine the activity (in Bq) of the radioactive material.
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04/21/23

A Carnot engine s operating between temperature T1 and T2 and has the efficiency of 1/6 .When thetemperature T2 is lowered by 53Kit efficiency becomes 1/4. Find temperatures T1 and T2.
A Carnot engine is operating between temperature T1 and T2 and has the efficiency of 1/6 .When the temperature T2 is lowered by 53K it efficiency becomes 1/4. Find temperatures T1 and T2.
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04/21/23

Chemistry related question

Which is a proper description of chemical equilibrium? (A)The frequencies of reactant and of product collisions are identical. (B)The concentrations of products and reactants are identical. (C)The... more
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04/21/23

At STP, a sample of methane gas (CH4) is combusted to produce 1.2 L carbon dioxide. What volume of oxygen was required for the reaction to occur?
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04/21/23

How many grams of hydrogen, H2, would be required to produce 40.0 grams of ammonia, NH3?
Balance the following reaction, then answer the question below.H2(g) + N2(g) =   NH3(g)How many grams of hydrogen, H2, would be required to produce 40.0 grams of ammonia, NH3?
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04/21/23

Digital music and CD Algebraic task
After analyzing the data, the sales manager of the company modeled the difference in sales using the cubic function s(x)=x^3-13x^2+44x-32 where x represents the number of years since 2005.... more
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04/21/23

What are the spectator ions in this equation?
Sodium thiosulfate + hydrochloric acid -> Sodium chloride + water + sulfur dioxide + sulfurNa2S2O3 (aq) + 2 HCl (aq) -> 2 NaCl (aq) + H20 (l) + S02 (g) + S (s)Break apart2Na + 2S + 3O + 2H +... more
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04/06/23

For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), which of the following concentrations of Mn²⁺ would cause an increase in E for the cell?
For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), which of the following concentrations of Mn²⁺ would cause an increase in E for the cell?
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03/30/23

The axis of rotation of a thin plate is located at the left side, calculate the moment of inertia 𝐼 if the plate has a length 𝐿 of 9.00 cm, a width 𝑤 of 7.00 cm,and a uniform mass density of 2.50 
The axis of rotation of a thin plate is located at the left side, as shown in the figure.Calculate the moment of inertia 𝐼 if the plate has a length 𝐿 of 9.00 cm, a width 𝑤 of 7.00 cm,and a uniform... more
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02/09/23

2 pairs vs 3 pairs

HERE's the FLIP : 7-J-K-2-JMY HAND : 7-Kmy opponent : 8-KI was told i lost the hand . Can someone explain to me why I lost here?what I don't get is why the 7 is irrelevant there
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12/07/22

KINEMATICS AND DYNAMICS OF CIRCULAR MOTION
A 76-kg pilot at an airshow performs a loop de loop with his plane. At the bottom of the 52-m radius loop, the plane is moving at 48 m/s. Determine the net force acting upon the pilot.
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12/02/22

Calculate the wavelength of the resulting wave on the cable. (Answer in meters)
A steel cable with total length 38m and mass 130kg is connected to two poles. The tension in the cable is 2,242 N, and the wind makes the cable vibrate with a frequency of 2 Hz. 
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03/16/22

I really can't understand this one.... A stone is thrown by a man on top of a tower 300ft high

A stone is thrown by a man on top of a tower 300ft high directly towards a target located 200ft from the foot of the tower on the ground. If the stone leaves his hand with a velocity of 60fps, find... more
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03/10/22

relative motion
A rock climber stands on top of a 60 m -high cliff overhanging a pool of water. He throws two stones vertically downward 1.0 s apart and observes that they cause a single splash. The initial speed... more
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03/08/22

Wr‎ite do‎wn an equ‎ation and determine the SI un‎it of all the propo‎rtionality constants
New‎ton’s law of unive‎rsal gravit‎ation st‎ates that two part‎icles exert a p‎ull on ‎each other wit‎hmagn‎itude 𝐹g ([kg ∙ m/s2]) that is prop‎ortional to the pro‎duct of their ma‎sses 𝑚1 ([kg])... more
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03/07/22

Calculus Physics Problem
A circular swimming pool has a diameter of 10 m. The circular side of the pool is 4 m high, and the depth of the water is 3.5 m. (The acceleration due to gravity is 9.8 m/s^2 and the density of... more
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03/06/22

Compare momentum of different moving objects
Two objects of the same volume, one is made of steel, the other is made of lead, are moving with the same velocity. Compare their momentum. The answer: the momentum of the lead object is 1.5 times... more
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03/02/22

4 1 8 4 J of energy is needed to heat 1 kg of water by 1 ∘ C ,but only 140 J is needed to heat 1 kg of mercury by 1 ∘ C .Which material has the higher specific heat capacity?
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03/02/22

Heat Problem Help
A) How many calories of heat are released when 500 grams of steam at 120°C are converted to ice at -4.0°C?B) A swimming pool is 4.0 meters wide and 10 meters long and has a depth of 1.5 meters. it... more
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