answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bija089
1 month ago
6

A beaker contains 450g of water at a temperature of 24C, The therman capacity of the beaker is negligible and no heat is gained

by, or lost to, the atmosphere. Calculate the mass of ice, initially at 0C, that must be mixed with the water so that the final temp of the contents of the beakers is at 8C.
Physics
1 answer:
Sav [3.1K]1 month ago
8 0
Given:

450 grams of water (Tw = 24 C) 
The beaker’s thermal capacity is negligible
Q = 0 
Tice = 0 C
Tfinal = 8 C

450g * (Tf - Tw) + m_ice * (Tice - Tw) = 0

450g * (8 - 24) + m_ice (0 - 24) = 0 

determine m_ice
 

You might be interested in
2. An airplane traveling north at 220. meters per second encounters a 50.0-meters-per-second crosswind
Yuliya22 [3333]

The speed resulting from the plane is (3) 226 m/s

Reasoning:

We can determine the plane's resultant speed using the Pythagorean Theorem because the two speeds form a right angle (creating a right triangle).

Thus, the computation is as follows:

ResultantSpeed=\sqrt{VerticalSpeed^{2}+HorizontalSpeed^{2}}\\\\ResultantSpeed=\sqrt{(220\frac{m}{s})^{2}+50\frac{m}{s})^{2}

ResulntantSpeed=\sqrt{48400\frac{m^{2} }{s^{2} }+2500\frac{m^{2} }{s^{2} } } \\\\ResultantSpeed=\sqrt{50900\frac{m^{2} }{s^{2} }}=226\frac{m}{s}

Consequently, the plane's resultant speed is (3) 226 m/s

Have a wonderful day!

5 0
3 months ago
What is the kinetic energy of a 100 kg object that is moving with a speed of 12.5m/s
Softa [3030]

The formula for the kinetic energy of any object in motion is

                           (1/2) (mass) (velocity²).

For the object you've mentioned, it translates to

                            (1/2) (100 kg) (12.5 m/s)²

                         =      (50 kg)  (156.25 m²/s²)

                         =              7,812.5 joules  
______________________________

Beware that your attachment is heavily blurred and unreadable.

7 0
2 months ago
If a person weighs 882 N on the surface of the earth, at what altitude above the earth’s surface must they be for their weight t
Sav [3153]

Para calcular el peso utilizamos la fórmula:
F=m*g=882N

Cuando tenemos dos cuerpos, empleamos la fórmula de la gravedad general:
F=G* \frac{ M_{p}*M_{E} }{ r^{2} }
Donde:
G = constante de gravedad = 6.67* 10^{-11} m^{3} kg^{-1} s^{-2}
Mp = masa de la persona = 882 / 9.81= 89.9kg
ME = masa de la Tierra = 5.97* 10^{24} kg
r = distancia entre la Tierra y la persona

A partir de estas dos fórmulas, deducimos que los lados izquierdos son equivalentes, por lo tanto, los lados derechos también deben serlo.
m*g=G* \frac{ M_{p}*M_{E} }{ r^{2} }

Resolviendo esta ecuación para r:
r= \sqrt{G* \frac{ M_{p}*M_{E}}{M_{p}*g}
r=6371116m = 6371.116km

Esta es la distancia desde el centro de la Tierra. El radio de la Tierra es 6370km y la altura sobre la superficie es 6371.116 - 6370 = 1.116km o 1116m.

3 0
3 months ago
Other questions:
  • A magnetron in a microwave oven emits electromagnetic waves with a frequency f-2450 MHz. What magnetic field strength is require
    13·1 answer
  • Reset the PhET simulation (using the button in the lower right) and set it up in the following manner: select Oscillate, select
    15·1 answer
  • A superhero swings a magic hammer over her head in a horizontal plane. The end of the hammer moves around a circular path of rad
    11·1 answer
  • A thin uniform rod of mass M and length L is bent at its center so that the two segments are now perpendicular to each other. Fi
    7·1 answer
  • Solve A and B using energy considerations.
    9·1 answer
  • A "biconvex" lens is one in which both surfaces of the lens bulge outwards. Suppose you had a biconvex lens with radii of curvat
    6·2 answers
  • The discovery and characterization of cathode rays was important in the development of the atomic theory because
    8·1 answer
  • A small glider is coasting horizontally when suddenly a very heavy piece of cargo falls out of the bottom of the plane.
    11·1 answer
  • Help..... :(
    11·2 answers
  • Two identical light springs with spring constant k3 are now individually hung vertically from the ceiling and attached at each e
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!