What is the most abundant element in the universe?<br> A. helium<br> B. hydrogen<br> C. carbon

A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its<br> speed?

Liula [17]

Answer:

30 mph

Explanation:

8 0

2 years ago

What is the pressure at the bottom of a tank 1-m deep? Take the density of water to be 1000-kg/m^3, and gravitational accelerati

lara31 [8.8K]

To solve this problem we will use the concepts related to hydrostatic pressure. Which determines the pressure of a body at a given depth of a liquid.

Mathematically this can be described as

$P= \rho gh$

Here

$\rho$ = Density

g = Gravity

h = Height (Depth)

If we replace the values given in the equation we will have to

$P = 1000 (9.8)(1)$

$P = 9800 Pa$

Therefore the pressure at the bottom will be 9.8kPa

4 0

3 years ago

What are the effects of pressure on liquids?

Vitek1552 [10]

Answer: Changes in pressure have very little effect on the volume of a liquid. Liquids are slightly incompressible because any increase in pressure can only slightly minimize the distance between the closely packed molecules. Hope this helps.

Explanation:

3 0

2 years ago

Read 2 more answers

15. When you cannot stop safely at a yellow traffic light before entering an intersection, ______________. A. stop in the inters

Elan Coil [88]

Answer: When you cannot stop safely at a yellow traffic light before entering an intersection, enter the intersection carefully and continue across.

Explanation: To find the correct answer, we need to know more about the traffic signal rules.

<h3>What is the traffic signal rules?</h3>

Red light- Indicator for the motorists to stop.
Green-Signal for safety and word GO.
Yellow- This signal let you know that the red signal is about to be displayed.
when it's turned on, you can start slowing down to come to a stop in anticipation of red light.
when we cannot stop safely at a yellow traffic light before entering an intersection, enter the intersection carefully and continue across.

Thus, we can conclude that, the option C is correct.

Learn more about the traffic signal rules here:

brainly.com/question/28044804

#SPJ4

4 0

2 years ago

When using a different calorimeter, and mixing 50 ml of hot water at 65 degrees c with 60 ml of water in the calorimete

Paha777 [63]

The specific heat capacity of the calorimeter used in mixing the water is determined as 21.87 J/g⁰C.

<h3>Conseervation of energy</h3>

The heat capacity of the calirometer is determined by applying the principle of conservation of energy.

Heat lost by the hot water = Heat gained by the calirometer

$Q _w = Q_c\\\\M_w C_w\Delta \theta _w = M_c C_c\Delta \theta _c$

where;

M is mass

mass = density x volume = ρV

Density of water = 1 g/ml

Mass of hot water = 1 x (50) = 50 g

Mass of water in calorimeter = 1 x (60) = 60 g

<h3>Equilibrium temperature</h3>

$\Delta T_c = 5.5\\\\T - 25 = 5.5\\\\T = 30.5 \ ^0C$

<h3>Specific heat capacity of the calirometer</h3>

$50 \times 4.184 \times (65 - 30.5) = 60 \times C_c \times (30.5 - 25)\\\\7217.4 = 330C_c\\\\C_c = \frac{7217.4}{330} \\\\C_c = 21.87 \ J/g^0C$

Thus, the specific heat capacity of the calorimeter used in mixing the water is determined as 21.87 J/g⁰C.

The complete question is below

When using a different calorimeter, and mixing 50 ml of hot water at

65 degrees C with 60 ml of water in the calorimeter at 25 degrees C, the temperature of the calorimeter increased by 5.5 degrees C.

a. Calculate the heat capacity of this calorimeter?

Learn more about heat capacity here: brainly.com/question/16559442

5 0

1 year ago

What is the most abundant element in the universe? A. helium B. hydrogen C. carbon