why do polar bears have big feet

why do polar bears have big feet

Yes, polar bears have partially webbed feet one that facilitates them in swimming longer distances. However, the polar bear feet are not even close to the penguinвs or duckвs feet. These birds have fully developed webbed feet. The polar bearвs feet are broad and heavy because the bear must run equally fast on land as it swims. The wide feet help the bear to walk on the sea ice rather efficiently. Polar bears are strong swimmers, probably the strongest of all land carnivores. A polar bear learning to swim. Do polar bears have webbed feet? Photo by DailyMail Thanks to their powerful wide paws which allow them to propel through water. Siberian tigers are also excellent swimmers but their feet are not so well adapted to swimming and so they can only swim for short distances. Polar bears, on

 why do we measure force in newtons

why do we measure force in newtons

What are forces? A force can be a push or a pull. For example, when you push open a door you have to apply a force to the door. You also have to apply a force to pull open a drawer. You cannot see a force but often you can see what it does. Forces can change the speed of something, the direction it is moving in or its shape. For example, an elastic band gets longer if you pull it. Forces can be measured using a force meter. Force meters contain a spring connected to a metal hook. ...

 why do warts turn black with apple cider vinegar

why do warts turn black with apple cider vinegar

Here's my story. I had 2 warts that I did ACV treatment with. One on my middle finger which I had for at least 10 yrs, and the other on my index finger that just started about 6 months ago. I believe the one on my index finger started from the one on my middle finger. Both were relatively small and just looked like raised bumps on my fingers. It took about 20 days, but older wart turned black, dried up and fell off. I continued with ACV until it fell off. After wart fell off I continued for another 5 days with ACV just to make sure wart virus was gone. ...

 why do we wear ppe in the workplace

why do we wear ppe in the workplace

As many workplaces are required, under WHS legislation, to engage in risk management and conduct assessments of risk, the use of PPE is often required as a safety measure. It is, however, something of a вlast resortв. All other necessary measures must be taken before implementing PPE. Under WHS laws, PCBUs are responsible for eliminating health and safety risks, and PPE is often one such control measure. While the provision of PPE can fall under either the duty of the employer, or the workers themselves, wearing PPE when instructed, in light of a risk management scheme, is required by law. Keeping aware of workplace requirements in this regard is the responsibility of everyone on site. Regulations 36, 44, and 45 of the model WHS Regulations cover the requirements of businesses relating to

 why do you poke holes in baked potatoes

why do you poke holes in baked potatoes

Out of the handful of professional cooks here at the show, not one of us had a potato explode. The above photo is simply a reenactment. At some point, we started thinking, Well, it s not like the skin of the potato isn t porous; steam should be able to escape it. So, we just started throwing unpoked potatoes into the oven at 400 degrees Fahrenheit and STILL there were no explosions. Huh. When we read through all of the thousand some-odd comments on Facebook, we discovered that many of you have had a lot of different experiences. Some Facebook fans had baked hundreds of unpoked potatoes without explosions, while others had them explode. Some have baked poked potatoes and they wound up exploding, anyway (and so on and so forth). This left us scratching our heads and saying, What gives?!

 why does my lower leg hurt after running

why does my lower leg hurt after running

If your lower right leg hurts after running, you might be suffering from shin splints, a common running injury. Shin splints is inflammation of muscles, tendons and tissue in the lower leg. The tibia bone -- large bone in the lower leg -- itself may also be involved. Shin splints cause pain along or behind the tibia. This pain often occurs after running or possibly the next day. Shin splints are especially common in beginning runners who may be training too much too soon or who may have foot placement errors. According to the Sports Injury Clinic, common causes of shin splints in runners are overpronation, or excessive turning inward of the foot during the running stride; oversupination, or excessive rolling outward; inadequate shoes; running too much too soon; running on hard surfaces;

 why does my armpit smell so bad

why does my armpit smell so bad

Those millions of bacteria have to live somewhere. Sweat and Odor There are two universally-accepted types of sweat glands. Eccrine Glands The most abundant of the sweat glands, eccrine are found on most of the body and that is: Б A sterile, dilute electrolyte solution that contains primarily sodium chloride (NaCl), potassium and bicarbonate. Б Most of us are familiar with : Б Continuous secretion. provides a mechanism for thermoregulation via evaporative heat loss [and] maintenance of electrolyte balance. Б Apocrine Glands б This type of gland is found in hairy places on the body, such as the armpits and between the legs. Near the skinБs surface, inside the hair follicle, : Б A milky fluid that most commonly [occurs] when youБre under emotional stress. This fluid is odorless. Б Despite

 why does a balloon make a noise when it pops

why does a balloon make a noise when it pops

Asked by: Marcus Rowland, Massachusetts The air in a balloon is at a higher pressure than its surroundings because the elastic tension of the balloon skin is pulling inwards. When you stick a pin in the side it creates a tiny hole. The rubber around the edge of the hole isnвt being pulled uniformly in all directions any more because there isnвt any force exerted from the centre of the hole. So the net force pulls the rubber away from the hole, which makes it bigger and the force imbalance increases. In a fraction of a second, the entire skin of the balloon has contracted all the way back to a point on the opposite side from the pin. The high-pressure air that was inside the balloon is now free to expand and this creates a pressure wave that our ears hear as a bang. If you put a piece of

 why do we keep getting back together

why do we keep getting back together

We all know that one couple with the classic on-again-off-again relationship. Sometimes you just want to send them a. But maybe those wishy-washy romantics are onto something: Approximately 50 percent of couples get back together again after breaking up, and a new study suggests that the reason is that they were ambivalent about breaking up in the first place. While the sensible thing is to stay far away from an old flame after calling it off, some people can convince themselves there are arguments for getting back together. A that found nearly half of all couples reunite also revealed that couples who got back together assumed their partner had changed for the better or that they would be better at communicating. But the newer research suggests their motivation may be more prosaic. In a

 why do we teach science in schools

why do we teach science in schools

-- Topics: Why Do We Need to Teach Science in Elementary School? What Is The Issue? JULIE CAFARELLA, AMBER MCCULLOCH PHILIP BELL -бJANUARY 2017 Scientific literacy starts in early childhood and continues through elementary school. Scientific knowledge is necessary to fully participate in human culture and democracyБespecially as it becomes more technological. The future of our nation depends on a scientifically literate public. Scientific literacy is a developmental process that takes years of concerted effort to cultivate. Science learning takes significant timeБbut that time is not being provided. shows that science instructional time is decreasing in elementary school. Only 20% of K-3 students and 35% of students in grades 4-6 have access to daily science instruction. (See this on